## MQXB06 Fabrication Report

#### TD-03-022

Kerby, Nobrega, Bossert, Rife

1.  **Introduction**

2.  **Superconducting Cable**

    1.  Cable mechanical parameters

    2.  Cable Electrical parameters

    3.  Cable test data

3.  **Coil Fabrication**

    1.  Cable and wedge insulation

    2.  Winding and Curing

    3.  Coil measurements (body, ends and longitudinal)

    4.  Coil shimming

    5.  Voltage taps

4.  **Coil Assembly**

    1.  Coil arrangement

    2.  Splices

    3.  Ground wrap system

5.  **Collaring and Keying**

    1.  Collaring

    2.  Keying

    3.  Mechanical measurements (longitudinal & collar deflection)

6.  **End Clamps**

    1.  Installation procedure

    2.  Measurements and shimming

7.  **Yoke and Skinning**

    1.  Assembly configuration

    2.  Welding

    3.  O.D. Measurements

    4.  Twist Measurements

    5.  Straightness Measurements

    6.  Axial loading

8.  **Final Assembly**

    1.  Final Electrical Measurements

    2.  Mechanical measurements

9.  **Discrepancies and Comments**

**1.0 Introduction**

MQXB06 is the sixth of eighteen production cold mass to be built in the
LHCIR Quadrupole series. Table 1.0.1 lists the previous cold masses in
the MQXB series and the numbers assigned to the fabrication reports that
describe them.

  ------------------------------- ---------------------------------------
  **Cold Mass number**            **Fabrication Report Number**

  MQXBP1 (prototype)              TD-02-009

  MQXB01                          TD-02-027

  MQXB02                          TD-02-038

  MQXB03                          TD-02-043

  MQXB04                          TD-03-004

  MQXB05                          TD-03-006
  ------------------------------- ---------------------------------------

######### Table 1.0.1 MQXB Cold Mass Fabrication Report Numbers

All the production cold masses (MQXB01-MQXB018) are essentially the same
in design. They were preceded by one prototype, MQXBP1. Like all
production cold masses, MQXB06 does not include R & D related
instrumentation, such as quench detection voltage taps, spot heaters,
strain gauges to measure coil azimuthal preload, or instrumentation on
the longitudinal preload screws (bullets).

The primary features of MQXB06 are listed below in Table 1.0.2. Changes
from the previous cold mass are highlighted in red and italicized.

+---------------------------+---+---+---+-------------------------------------+---+
| Inner Cable Strand No.    |   | 3 |   |                                     |   |
|                           |   | 7 |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inner Strand Manufacturer |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   |   |   |                                     |   |
|                           |   | A |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | m |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inner Cable lay direction |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   |   |   |                                     |   |
|                           |   | R |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   |   |   |                                     |   |
|                           |   | L |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | y |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer Cable Strand No.    |   | 4 |   |                                     |   |
|                           |   | 6 |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer Strand Manufacturer |   | A |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | m |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer Cable lay direction |   | L |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | f |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | L |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | y |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Cable Pre-baking          |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Strand Coating            |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Cable Cleaning Fluid      |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   |   |   |                                     |   |
|                           |   | A |   |                                     |   |
|                           |   | B |   |                                     |   |
|                           |   | Z |   |                                     |   |
|                           |   | O |   |                                     |   |
|                           |   | L |   |                                     |   |
|                           |   |   |   |                                     |   |
|                           |   | V |   |                                     |   |
|                           |   | G |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inner Cable Insulation    |   | 2 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | x |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | 8 |   |                                     |   |
|                           |   | % |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | v |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
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|                           |   | u |   |                                     |   |
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|                           |   | d |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | y |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | x |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | 2 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
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|                           |   | w |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | Q |   |                                     |   |
|                           |   | I |   |                                     |   |
|                           |   | X |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer Cable Insulation    |   | 2 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | x |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | % |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | v |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | r |   |                                     |   |
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|                           |   | b |   |                                     |   |
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|                           |   | 5 |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | x |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | 4 |   |                                     |   |
|                           |   | 8 |   |                                     |   |
|                           |   | % |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | v |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | Q |   |                                     |   |
|                           |   | I |   |                                     |   |
|                           |   | X |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Coil Curing temperature   |   | 1 |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | C |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 3 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | C |   |                                     |   |
|                           |   | T |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | y |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inner coil curing         |   | h |   |                                     |   |
| pressure                  |   | i |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 3 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | C |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | C |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer coil curing         |   | h |   |                                     |   |
| pressure                  |   | i |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 3 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | C |   |                                     |   |
|                           |   | / |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | C |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inner Coil target size    |   | + |   |                                     |   |
|                           |   | 3 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | ( |   |                                     |   |
|                           |   | + |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 2 |   |                                     |   |
|                           |   | ) |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inner Coil target MOE     |   | 9 |   |                                     |   |
|                           |   | G |   |                                     |   |
|                           |   | P |   |                                     |   |
|                           |   | a |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer Coil target size    |   | + |   |                                     |   |
|                           |   | 2 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | ( |   |                                     |   |
|                           |   | + |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | ) |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer Coil target MOE     |   | 9 |   |                                     |   |
|                           |   | G |   |                                     |   |
|                           |   | P |   |                                     |   |
|                           |   | a |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Target Prestress          |   | 7 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | - |   |                                     |   |
|                           |   | 8 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | P |   |                                     |   |
|                           |   | a |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Coil end azimuthal Shim   |   | S |   |                                     |   |
| System                    |   | h |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | y |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | f |   |                                     |   |
|                           |   | f |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | f |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | S |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | F |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | 3 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 4 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| End Part Material         |   | G |   |                                     |   |
|                           |   | - |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | C |   |                                     |   |
|                           |   | R |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| End Part Configuration    |   | I |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | 2 |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | k |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Splice Configuration      |   | I |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | l |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Voltage Tap Plan          |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | Q |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | z |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | v |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | T |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | ( |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | q |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | ) |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | y |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
|                           |   |   |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inter layer strip heaters |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer layer strip heaters |   | C |   |                                     |   |
|                           |   | E |   |                                     |   |
|                           |   | R |   |                                     |   |
|                           |   | N |   |                                     |   |
|                           |   | v |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | # |   |                                     |   |
|                           |   | 2 |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | M |   |                                     |   |
|                           |   | D |   |                                     |   |
|                           |   | - |   |                                     |   |
|                           |   | 3 |   |                                     |   |
|                           |   | 6 |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | 6 |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Key extension             |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Inner coil Bearing Strips |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Outer coil Bearing Strips |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Collar configuration      |   | 3 |   |                                     |   |
|                           |   | 8 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | k |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | s |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Collar key configuration  |   | 1 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | 2 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 4 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | z |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Strain Gauges             |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Spot Heaters              |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| End Radial Support        |   | C |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | A |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | x |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | G |   |                                     |   |
|                           |   | - |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | C |   |                                     |   |
|                           |   | R |   |                                     |   |
|                           |   | q |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
|                           |   |   |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Collar/Yoke Interface     |   | R |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | y |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | k |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Quadrant Lead             |   | D |   |                                     |   |
| Configuration             |   | o |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | w |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | h |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | f |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | z |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| End longitudinal loading  |   | B |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | y |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | y |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | , |   |                                     |   |
|                           |   | 8 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 9 |   |                                     |   |
|                           |   | k |   |                                     |   |
|                           |   | N |   |                                     |   |
|                           |   | ( |   |                                     |   |
|                           |   | 2 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | 0 |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | ) |   |                                     |   |
|                           |   | f |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | u |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | E |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | r |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | b |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | p |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | t |   |                                     |   |
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|                           |   | i |   |                                     |   |
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|                           |   | 7 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 6 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 1 |   |                                     |   |
|                           |   | ) |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Yoke Key Width            |   | 2 |   |                                     |   |
|                           |   | 6 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Strain Gauges on Skin     |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| End Plate Thickness       |   | 3 |   |                                     |   |
|                           |   | 5 |   |                                     |   |
|                           |   | m |   |                                     |   |
|                           |   | m |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Tuning Shims              |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | e |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Other                     |   | N |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | - |   |                                     |   |
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|                           |   | i |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | a |   |                                     |   |
|                           |   | l |   |                                     |   |
|                           |   | d |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | g |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | S |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | s |   |                                     |   |
|                           |   | e |   |                                     |   |
|                           |   | c |   |                                     |   |
|                           |   | t |   |                                     |   |
|                           |   | i |   |                                     |   |
|                           |   | o |   |                                     |   |
|                           |   | n |   |                                     |   |
|                           |   | 4 |   |                                     |   |
|                           |   | . |   |                                     |   |
|                           |   | 3 |   |                                     |   |
|                           |   | . |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Coil Fabrication Start    |   |   |   | 6/1/02                              |   |
| Date                      |   |   |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+
| Cold Mass Completion Date |   |   |   | 9/28/02                             |   |
+---------------------------+---+---+---+-------------------------------------+---+
|                           |   |   |   |                                     |   |
+---------------------------+---+---+---+-------------------------------------+---+

**Table 1.0.2** **MQXB06 features.**

**2.0 Superconducting Cable**

**2.1 Cable Mechanical Parameters**

Tables 2.1.1 and 2.1.2 summarize the cable dimensional parameters used
in MQXB06. Inner cable came from reel LHC-3-A-N0014, and was made by New
England Electric Wire Corp. using Alsthom strand. Outer cable came from
reel LHC-4-A-N0011 and LHC-4-A-N0012, and was made by New England
Electric Wire Corp. using Alsthom strand. All cable was cleaned
ultrasonically, at an elevated temperature (160C), with ABZOL VG, in a
degreaser made by Branson Inc (the same machine used for the Tevatron).
The degreaser is inserted into the cable insulating line, just before
the cable is insulated.

  ----------------------- ---------- ------------------- -------------------
  **Parameter**           **Unit**   **Inner cable**     **Outer cable**

  Radial width, bare      mm         15.4                15.4

  Minor edge, bare        mm         1.320               1.051

  Major edge, bare        mm         1.610               1.241

  Midthickness, bare      mm         1.465               1.146

  Keystone angle,         deg        1.079               0.707

  Pitch Length            mm         114                 102

  Number of strands                  37                  46

  Lay direction                      Right               Left
  ----------------------- ---------- ------------------- -------------------

**Table 2.1.1: Cable design parameters for MQXB Magnets.**

  --------------- ---------- ------------------------ ------------------------
  **Parameter**   **Unit**   **Inner cable (N0014)**  **Outer cable
                                                      (N0011/12)**

  Radial width,   mm         15.3903                  15.4064/15.4019
  bare                                                

  Minor edge,     mm         1.3222                   1.0540/1.0552
  bare                                                

  Major edge,     mm         1.6080                   1.2380/1.2372
  bare                                                

  Midthickness,   mm         1.4651                   1.1460/1.1462
  bare                                                

  Keystone angle, deg        1.064                    .684/.677

  Pitch Length    mm         114.3                    101.6/101.6

  Number of                  37                       46/46
  strands                                             

  Lay direction              Right                    Left/Left
  --------------- ---------- ------------------------ ------------------------

**Table 2.1.2: Cable actual parameters for MQXB06.**

**2.2 Cable Electrical Parameters**

Electrical Data and cable test data in sections 2.2 and 2.3 were taken
at BNL. Two tests of inner cable N0014, four tests of outer cable N0011
and two tests of outer cable N0012 were done. The ranges shown in the
cable columns represent the range of values taken from the multiple
tests.

  --------------- ---------- --------------- ----------------- -----------------
  **Parameter**   **Unit**   **Inner Cable   **Outer Cable     **Outer Cable
                             (N0014)**       (N0011)**         (N0012)**

  R(293 K)        μohms/cm   16.282-16.314   17.867-17.913     18.056-18.123

  R(10 K)         μohms/cm   0.182-0.204     0.376-0.376       0.434-0.447

  RRR                        80 - 90         48 - 48           41 - 42

  C/Sc                       1.29-1.31       2.06-2.07         1.87-1.89
  --------------- ---------- --------------- ----------------- -----------------

**Table 2.2.1: Cable electrical parameters as provided by BNL**

**2.3 Cable Test Data**

+-----+-----------+---------+-----------+--------+--------+---------+
|     | ######    |         | **oUTER   |        | #####  |         |
|     |  INNER CA |         | cABLE     |        | ### Ou |         |
|     | BLE N0014 |         | N0011**   |        | ter CA |         |
|     |           |         |           |        | ble N0 |         |
|     |           |         |           |        | 012 {# |         |
|     |           |         |           |        | outer- |         |
|     |           |         |           |        | cable- |         |
|     |           |         |           |        | n0012  |         |
|     |           |         |           |        | .unnum |         |
|     |           |         |           |        | bered} |         |
+-----+-----------+---------+-----------+--------+--------+---------+
| B,  | I~c~, KA  | J~c~,   | I~c~, KA  | J~c~,  | I~c~,  | J~c~,   |
| T   |           | A/mm^2^ |           | A      | KA     | A/mm^2^ |
|     |           |         |           | /mm^2^ |        |         |
+-----+-----------+---------+-----------+--------+--------+---------+
| 6   | 21.0      | 25      | 11.8      | 243    | 1      | 23      |
|     | 94-21.097 | 53-2565 | 22-12.191 | 5-2519 | 2.173- | 07-2359 |
|     |           |         |           |        | 12.376 |         |
+-----+-----------+---------+-----------+--------+--------+---------+
| 7   | 15.4      | 18      | 8.        | 178    | 9.002  | 17      |
|     | 58-15.510 | 71-1886 | 625-8.924 | 7-1849 | -9.030 | 06-1721 |
+-----+-----------+---------+-----------+--------+--------+---------+
| 8   | 9.        | 11      | 5.        | 110    | 5.684  | 10      |
|     | 821-9.923 | 89-1206 | 333-5.685 | 5-1178 | -5.831 | 84-1105 |
+-----+-----------+---------+-----------+--------+--------+---------+

**Table 2.3.1:** **Cable test data at 4.2K as provided by BNL**

**3.0 Coil Fabrication**

**3.1 Cable and Wedge Insulation**

Table 3.1.1 summarizes the cable insulation parameters used in MQXB06.
Note that the adhesive on the outer wrap of both inner and outer cable
is modified polymide (QIX) instead of QI. QIX had been introduced late
in the short magnet program. The wedges were insulated identically to
their respective coils.

+---------------+---------------------------+-------------------------+
| **Parameter** | **Inner cable**           | **Outer cable**         |
+---------------+---------------------------+-------------------------+
| Number of     | 2                         | 2                       |
| wraps         |                           |                         |
+---------------+---------------------------+-------------------------+
| **Inner       | Kapton tape 25 μm × 9.5   | Kapton tape 25 μm × 9.5 |
| wrap:**       | mm                        | mm                      |
|               |                           |                         |
| -material     | None                      | None                    |
|               |                           |                         |
| -adhesive     | Spiral wrap with 58%      | Spiral wrap with 50 %   |
|               | overlap                   | overlap                 |
| -wrap         |                           |                         |
| structure     |                           |                         |
+---------------+---------------------------+-------------------------+
| **Outer       | Kapton tape 50 μm × 9.5   | Kapton tape 25 μm × 9.5 |
| wrap:**       | mm                        | mm                      |
|               |                           |                         |
| -material     | Modified Polyimide (QIX)  | Modified polyimide      |
|               |                           | (QIX)                   |
| -adhesive     | Spiral wrap with 2 mm     |                         |
|               | gaps                      | Spiral wrap with 48 %   |
| -wrap         |                           | overlap                 |
| structure     |                           |                         |
+---------------+---------------------------+-------------------------+

**Table 3.1.1: MQXB06 cable insulation parameters.**

**3.2 Winding and Curing**

MQXB coils are cured using a two-step cycle (to control interstrand
resistance) with low pressure/high temperature followed by a high
pressure/low temperature step. All coils have wedge breaks staggered
such that the breaks are not coincident at any longitudinal location in
the same coil. Gaps between the wedges before curing are 2.2mm.

**3.3 Coil Measurements**

**[3.3.1 Coil Straight Section]{.underline}**

Coil azimuthal size and modulus measurements were taken over a range of
pressures, 55 to 100 MPa. The design pressure for both the inner and
outer coils at room temperature is about 75-80 MPa. Coils are measured
with a 3 inch (76mm) gauge length along the straight section of the
magnet, from lead end to non-lead end. During this process, resistance
measurements are taken to ensure that there are no turn-to-turn shorts.

The target sizes are +300 μm for inner coils and +250 μm for outer
coils, at a pressure of 83 MPa. These values represent a size "with
respect to the design size inside the cross section when the magnet is
operating". The larger sizes are necessary at room temperature to
achieve the correct sizes when the magnet is cold and powered. Table
3.3.1 lists the coils used in MQXB06 and their corresponding average
(unshimmed) size and modulus of elasticity.

+------------------+-------------+------------+------------+---------+
| **Coil Numbers** | **SIDE A    | **E(A)     | **SIDE B   | **E(B)  |
|                  | μm**        | GPa**      | μm**       | GPa**   |
+------------------+-------------+------------+------------+---------+
| ##### MQXBi-043  | 297         | 8.6        | 302        | 8.6     |
+------------------+-------------+------------+------------+---------+
| MQXBi-044        | 318         | 8.8        | 323        | 8.8     |
+------------------+-------------+------------+------------+---------+
| MQXBi-045        | 318         | 8.6        | 323        | 8.5     |
+------------------+-------------+------------+------------+---------+
| MQXBi-046        | 295         | 8.9        | 295        | 9.0     |
+------------------+-------------+------------+------------+---------+
| MQXBo-043        | 210         | 9.6        | 213        | 9.7     |
+------------------+-------------+------------+------------+---------+
| MQXBo-044        | 221         | 9.7        | 224        | 9.6     |
+------------------+-------------+------------+------------+---------+
| MQXBo-045        | 233         | 8.8        | 230        | 8.8     |
+------------------+-------------+------------+------------+---------+
| MQXBo-046        | 234         | 9.4        | 237        | 9.5     |
+------------------+-------------+------------+------------+---------+

**Table 3.3.1**: **MQXB06 coil body size and modulus.**

Variation of the size along the length of the coils is shown in Figs
3.3.1 and 3.3.2. Side A is the "first wound" side of the coil and Side B
is the side with the lead extending from the end of the saddle. The full
length of each coil is measured, encompassing 67 positions, each 76mm
long.

![](media/image1.wmf){width="2.9118055555555555in"
height="1.8368055555555556in"}![](media/image2.wmf){width="2.8916666666666666in"
height="1.8243055555555556in"}![](media/image3.wmf){width="2.8916666666666666in"
height="1.8118055555555554in"}![](media/image4.wmf){width="2.921527777777778in"
height="1.8305555555555555in"}

**Figure 3.3.1**: **Variation of size along the length of inner coils.**

![](media/image5.wmf){width="2.908333333333333in"
height="1.7597222222222222in"}![](media/image6.wmf){width="2.8993055555555554in"
height="1.7652777777777777in"}![](media/image7.wmf){width="2.908333333333333in"
height="1.7652777777777777in"}![](media/image8.wmf){width="2.890277777777778in"
height="1.7597222222222222in"}

**Figure 3.3.2**: **Variation of size along the length of outer coils.**

**[3.3.2 Coil Length Measurements]{.underline}**

MQXB coils are wound and cured using steel tooling which fixes the coil
to a specific length. When a coil is removed from the tooling after
curing, it shrinks longitudinally, relieving the stresses incurred
during the coil and cable manufacturing processes. After curing, the
straight section of each coil is measured longitudinally (back of key to
back of key). "Springback" is defined as the difference between the coil
length before curing and after being removed from the curing tooling.
Measurements in mm are shown in Table 3.3.2..

+------------------------------------+---------------------------------+
| **Coil Number**                    | **Springback**                  |
+------------------------------------+---------------------------------+
| ##### MQXBi-043                    | 4.2                             |
+------------------------------------+---------------------------------+
| MQXBi-044                          | Not Available                   |
+------------------------------------+---------------------------------+
| MQXBi-045                          | 4.1                             |
+------------------------------------+---------------------------------+
| MQXBi-046                          | 4.0                             |
+------------------------------------+---------------------------------+
| MQXBo-043                          | 8.8                             |
+------------------------------------+---------------------------------+
| MQXBo-044                          | 8.6                             |
+------------------------------------+---------------------------------+
| MQXBo-045                          | 8.6                             |
+------------------------------------+---------------------------------+
| MQXBo-046                          | 8.5                             |
+------------------------------------+---------------------------------+

**Table 3.3.2**: **"Springback", or Coil Longitudinal Shrinkage.**

**3.4 Coil Shimming**

**[3.4.1 Coil Straight Section]{.underline}**

+----+-------+-----+--------+---------+------+-----+---------------+
| I  | Qua   | C   | Coil   | Pole    | Midp | Tar | Shimmed Coil  |
| /O | drant | oil | Size   | Shim    | lane | get | Size          |
|    |       | \#  |        |         | shim |     |               |
|    |       |     | μm     | μm      |      | μm  | μm            |
|    |       |     |        |         | μm   |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 1A    | i-  | 297    | 25      | -25  | 300 | 297           |
| nn |       | 043 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 1B    | i-  | 302    | 25      | -25  | 300 | 302           |
| nn |       | 043 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 2A    | i-  | 318    | 25      | -25  | 300 | 318           |
| nn |       | 044 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 2B    | i-  | 323    | 25      | -25  | 300 | 323           |
| nn |       | 044 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 3A    | i-  | 295    | 25      | -25  | 300 | 295           |
| nn |       | 046 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 3B    | i-  | 295    | 25      | -25  | 300 | 295           |
| nn |       | 046 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 4A    | i-  | 318    | 25      | -25  | 300 | 318           |
| nn |       | 045 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| I  | 4B    | i-  | 323    | 25      | -25  | 300 | 323           |
| nn |       | 045 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 1A    | o-  | 234    | 0       | 0    | 250 | 234           |
| ut |       | 046 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 1B    | o-  | 237    | 0       | 0    | 250 | 237           |
| ut |       | 046 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 2A    | o-  | 221    | 0       | 0    | 250 | 221           |
| ut |       | 044 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 2B    | o-  | 224    | 0       | 0    | 250 | 224           |
| ut |       | 044 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 3A    | o-  | 233    | 0       | 0    | 250 | 233           |
| ut |       | 045 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 3B    | o-  | 230    | 0       | 0    | 250 | 230           |
| ut |       | 045 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 4A    | o-  | 210    | 0       | 0    | 250 | 210           |
| ut |       | 043 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+
| O  | 4B    | o-  | 213    | 0       | 0    | 250 | 213           |
| ut |       | 043 |        |         |      |     |               |
| er |       |     |        |         |      |     |               |
+----+-------+-----+--------+---------+------+-----+---------------+

**Table 3.4.1: Kapton shimming used in the coil straight section.**

If the magnet coil sizes do not meet the target, they may be azimuthally
shimmed with kapton to reach the target levels. The target pre-stress
for MQXB06 is about 75-80 MPa. This corresponds to a nominal coil size
of +300 μm for inner coils and +250 μm for outer coils. The inner coil
sizes in MQXB06 varied from 295 to 323 μm with an average of 309 μm;
whereas the outer coil size varied between 210 and 237 μm with an
average of 225 μm. Although no shimming was deemed necessary for preload
adjustment, the inner coil pole and midplane were shimmed for harmonic
purposes. See section 4.3 for a detailed explanation. Table 3.4.1 lists
the coil and shim sizes used in MQXB06, and reflects the ground
insulation changes shown in section 4.3.

**[3.4.2 Coil Ends]{.underline}**

Resistance readings were taken while compressing the ends of the MQXB06
coils to 83 MPa, both lead and non-lead end of both inner and outer
coils. Size measurements were not taken on the ends. The ends of the
MQXB06 coils were shimmed azimuthally with sheets of 125 um thick
kapton, according to a formula that was established on the last short
models (HGQ07-9), as are all long production coils. Shimming is shown in
Figure 3.4.1 and is recorded in FNAL drawings 5520-MD-369695 and
5520-MD-369696. Dimensions in Figure 3.4.1 are in mm.

![](media/image9.wmf){width="4.3069444444444445in"
height="3.8027777777777776in"}

**Figure 3.4.1: End Shimming on MQXB06.**

**3.5 Voltage Taps**

Quench characterization voltage taps and spot heaters were not used on
MQXB06, and are not used on any MQXB production magnets. As in all
production magnets, MQXB06 includes ¼ coil taps, ½ coil taps, and taps
on the leads as they exit the magnet.

**4.0 Coil Assembly**

**4.1 Coil Arrangement**

Coils in LHCIR Quadrupole magnets are arranged to obtain the most
uniform possible preload distribution between quadrants, given the coils
available. The coil arrangement is shown in Figure 4.1.1. The amount of
shim placed at each pole and parting plane is shown in red (positive
numbers indicate kapton added, negative numbers indicate kapton
removed). Red numbers are in inches (.001 in. = 25 um). Shims may be
added to (or removed from) the midplane and/or pole area to achieve the
"target" azimuthal coil size and hence the desired preload. See also
section 3.4 and 4.3 for discussions of coil shimming. The numbers in
light blue in Figure 4.1.1 shown near each midplane (e.g., 310i, 229o,
for Q1/2) show the "after arrangement and shimming" sizes of the inner
and outer "octant pairs", respectively, in microns.

The shim sizes shown in Figure 4.1.1 are "with respect to the original
design", that is, the positive and negative .001 inch (25um) shims shown
at the inner coil pole and midplane respectively, represent the shim
change for adjustment of harmonics described in section 4.3.

![](media/image10.wmf){width="5.992361111111111in"
height="3.390277777777778in"}

# Figure 4.1.1 MQXB06 Coil Arrangement

**4.2 Splices**

The pole turns of each inner/outer coil pair need to be spliced
together. Splices are 114 mm long, slightly greater than the cable
transposition pitch. Areas to be spliced are preformed, and filled with
solder before the coil is wound. The filled, or "tinned" sections are
then spliced after the coils are assembled on the mandrel. The MQXB06
splices were made at 225 degrees C with 96% tin 4% silver solder using a
Kester 135 flux.

All pole splices were insulated with two layers of Kapton tape, one
layer of 25um thick × 9.5 mm wide surrounded by one layer of 50um thick
× 9.5 mm wide. Both layers are spiral wrapped with 2 mm gaps. The second
layer is wrapped directly on top of the first layer, leaving uncovered
bare cable in the 2mm gaps. Axial and radial cooling channels were made
in the G11CR spacers, which surround the splice as well.

**4.3 Ground Wrap System**

The original design configuration for the coil ground wrap and
insulation (used on MQXB01-3) is shown in Figure 4.3.1. A complete
description of the original ground wrap system, including body and ends,
is shown in assembly drawing #5520-MC-369659, Rev. B. All layers of
kapton are .005 inch (125um) thick unless otherwise specified in the
figure.

To improve harmonics, a series of minor changes were made to the system,
beginning with MQXB04. An explanation of the purpose of the ground
insulation revision follows:

> The prototype (P1), along with the first three production magnets
> (MQXB01-MQXB03), showed a significant change in the normal dodecapole
> with respect to the model magnets, measured at the collared coil
> stage. Taking into account the systematic warm-cold shift seen in the
> model magnets and prototype, the dodecapole in these magnets is
> expected to be about ½ unit more negative at operating temperature
> than the value implied by the model magnets. As a result, the inner
> coils of magnet MQXB04 were shimmed toward the midplane by 38 um,
> reducing the normal dodecapole. This modification is shown in Figure
> 4.3.2. Dotted lines show where ground insulation pieces were cut away
> and removed. Dimensions are in inches (.001 in = 25um).

Warm measurements of MQXB04 showed the 38um shift to be slightly more
than necessary, so inner coils on later magnets, beginning with MQXB05,
are shimmed only 25um toward the midplane with respect to the original
design. This was done on MQXB05 and MQXB06 by a method similar to that
done on MQXB04, as shown in figure 4.3.3. Then, beginning with MQXB07,
the shift was incorporated permanently into the design by ordering new
parts (as shown in figure 4.3.3), so that modification of existing parts
on the assembly floor was no longer necessary. (See MQXB07 and
subsequent Fabrication Reports).

Quench protection heaters are placed radially between the outer coil and
collar laminations. The heaters have stainless steel elements, .001 inch
(25um) thick, .630 inches (16mm) wide, copper plated on one side. The
copper is etched away intermittently over 4.00 inch ( 101.6mm) lengths,
exposing the stainless, with 4.00 inch (101.6mm) lengths of copper
plated areas between them. The stainless/copper element is sandwiched
between (and bonded to) two pieces of .004 in. (100 micron) thick
kapton. They are described in detail in drawing #5520-MB-369369.

![](media/image11.wmf){width="3.6875in" height="2.1347222222222224in"}

Figure 4.3.1 Original (MQXB01-3) Body Coil and Ground Insulation System

![](media/image12.wmf){width="3.248611111111111in"
height="2.027083333333333in"}
![](media/image13.wmf){width="3.2888888888888888in"
height="2.029861111111111in"}

> Figure 4.3.2 Ground Insulation Systems of MQXB01-3 and modifications
> of MQXB04.

![](media/image14.wmf){width="3.032638888888889in"
height="1.8777777777777778in"}![](media/image15.wmf){width="3.032638888888889in"
height="1.8743055555555554in"}

Figure 4.3.3 Ground Insulation System Modifications made on MQXB05,
MQXB06 and subsequent magnets.

5.0 Collaring and Keying

**5.1 Collaring**

To ensure that the splices are aligned properly, the coils are assembled
so that the back surface of the lead end keys of all four quadrants in
both layers are coplanar. The back surfaces of the outer coil keys on
the lead end are then "cut to fit" to allow the back of all four
quadrant keys to be coplanar. On the non-lead end, the outer coil keys
are cured into the coils. Their back surface defines the coil length
after springback (springback is defined in section 3.3.2). The inner
coil keys are cut to fit at assembly to make them coplanar
(quadrant-to-quadrant variations in length created by differences in
outer coil springback are small enough to ignore).

Collars are welded into packs, each 38mm long, with "large" and "small"
alternating laminations, and shown in Figure 5.1.1. The collared coil
assembly does not include bearing strips. Each collar pack is 25
laminations long, (\~39 mm total length). Packs are made with a "large"
lamination on each end, creating a gap between each collar pack in each
quadrant, where a "small" lamination is missing. These gaps allow
passage for heat flow.

![](media/image16.png){width="3.3194444444444446in"
height="2.6881944444444446in"}

Figure 5.1.1: Collar pack.

**5.2 Keying**

MQXB06 was keyed according to procedure #TD-02-010. Collaring keys are 6
inches long. Cylinder pressures were increased slightly from the
procedure to fully seat the keys. Steps (including press pressures used
on MQXB06) are shown below. Passes are done in 6 inch increments,
aligned with the keys, unless otherwise noted.

1)  Massage at 900 pump psi main cylinder pressure

2)  Massage at 1800 pump psi main cylinder pressure

3)  Partial key insertion with main cylinder pressure 3000 pump psi/key
    cylinder pressure 700 pump psi

4)  Full key insertion pass with main cylinder pressure increased to
    4400 pump psi and key cylinder pressure increased to 2700 pump psi

5)  2^nd^ full key insertion pass with main cylinder pressure increased
    to 4700 pump psi and key cylinder pressure increased to 3300 pump
    psi

6)  3^rd^ full key insertion pass with main cylinder pressure increased
    to 5000 pump psi and key cylinder pressure increased to 3600 pump
    psi, done in 3 inch increments.

7)  4^th^ full key insertion pass with main cylinder pressure maintained
    at 5000 pump psi and key cylinder pressure increased to 4000 pump
    psi, done in 3 inch increments.

8)  Final pass straddling keys at 5000 pump psi main cylinder pressure
    and 4000 pump psi key cylinder pressure.

**5.3 Mechanical measurements**

The outside collar diameter measurement data for the collared coil
assembly is shown in Figures 5.3.2-5.3.3. The measurements are taken
from the non-lead end to the lead end of the collared area (back of key
to back of key as shown in Figure 5.3.1), approximately every 8 cm
(three inches). Diameters are displayed in the figures in mm.

![](media/image17.wmf){width="4.469444444444444in"
height="1.426388888888889in"}

**Figure 5.3.1: Collared coil assembly without end clamps installed.**

![](media/image18.wmf){width="4.889583333333333in"
height="2.9159722222222224in"}

**Figure 5.3.2: Collared coil deflections at pole region after keying.**

![](media/image19.wmf){width="4.944444444444445in"
height="3.033333333333333in"}

**Figure 5.3.3: Collared coil deflections at midplane region after
keying.**

The measurements show a mean radial deflection of 189 um at the midplane
and 202 um at the pole. When adjusted for actual collar lamination sizes
(the plots in Figures 5.3.2 and 5.3.3, above, do not reflect these
adjustments), these deflections are similar to that of the last two
short models, HGQ08 and HGQ09 and previous long magnets, as shown in
Table 5.3.1 and Figure 5.3.4, indicating a similar preload.
(Measurements for MQXB04 are unavailable).

![](media/image20.wmf){width="3.125in" height="1.4986111111111111in"}

**Table 5.3.1: Collared coil deflections of HGQ08-MQXB06.**

![](media/image21.wmf){width="3.167361111111111in"
height="2.436111111111111in"}

**Figure 5.3.4: Collared coil deflections of HGQ08-MQXB06.**

There is an inconsistency concerning the collar deflection measurements
on MQXB06. Figure 5.3.5 shows the relationship between the mean coil
size (average of mean size of all inner and outer coils within the
respective magnet) and mean collar deflection measurements (average of
pole and midplane) for magnets MQXB01-MQXB06. This relationship is
routinely monitored to cross check the accuracy of the two measurements.
For all magnets except MQXB06, this data is consistent, i.e., larger
coil sizes yield larger collar deflections. Magnet MQXB06, however,
while having the largest mean coil size, has the smallest collar
deflections. Although the preload inferred from either the coil sizes
(highest of all production magnets) or the collar deflections (lowest of
all production magnets), is within the "acceptable" range, the
inconsistencies between the two measurements are a concern.

Some attempts have been made to resolve the issue. Coils produced within
the same time period as the MQXB06 coils, as well as a "standard" used
to calibrate the measuring machine, have been re-measured. These
measurements support the accuracy of the coil measurements. Assembly
travelers have been checked to ensure that all coil insulation, ground
wrap, and shims were placed into the magnet as specified. Component size
measurements have been verified. Warm harmonic measurements have been
checked and have not identified any inconsistencies related to conductor
position within the body of MQXB06. End clamp deflection measurements
(see section 6.2) indicate a preload consistent with that derived from
the coil measurements. Unfortunately, since the magnet has been yoked,
collar deflection measurements cannot be retaken.

Therefore, at this writing, although the issue has not been completely
resolved, it is assumed that the coil size measurements are correct and
that the collar deflection measurements are erroneous.

![](media/image22.wmf){width="3.557638888888889in"
height="2.5840277777777776in"}

**Figure 5.3.5: Mean Coil Size vs. Radial Collar Deflection**

After keying is complete, the magnet body is measured longitudinally,
and the center of the magnetic length is marked on the collar surface.
This mark will be transferred to the skin surface during the yoking
process.

# 6.0 End Clamps

# 

# 6.1 Installation Procedure:

The lead end clamp on MQXB06 is 250mm (9.842 inches) long and the
non-lead end clamp is 132mm (5.197 inches) long. G-11 filler cones were
used. Longitudinal force required to close the "collet' end clamps was
460 kN (103500 lbs.) on the lead end and 227 kN (51100 lbs.) on the
non-lead end.

# 6.2 Measurements and Shimming: 

The production cold mass design allows for extra radial ground
insulation to be added around the outer coil ends, if needed, to adjust
the end preload. Based on measurements of short models and P1 (the full
size prototype), the thickness of radial ground insulation surrounding
the outer coil ends was increased by 75 microns (on the radius) at both
ends from the original design, beginning with MQXB01 (see the P1
Fabrication report, TD-02-009, for more details), and continuing through
MQXB04. Beginning with MQXB05, the shim was removed due to concerns
about the shorts in the transition area between the body and ends, and
because an acceptable deflection was achieved without it. As in MQXB05,
no shim was used on MQXB06. The deflection of the diameter of the
aluminum end cans according to micrometer measurements are shown below
in Figure 6.2.1 (target diameter change from FEA, was 250 - 300 microns
at the LE and 200-250 microns at the non-LE).

![](media/image23.wmf){width="3.454861111111111in"
height="2.1791666666666667in"}

Figure 6.2.1: Aluminum End Can Radial Deflection (Diameter)

# 7.0 Yoke and Skinning

# 7.1 Assembly Configuration:

All yoke lamination packs were fusion welded longitudinally in 7 places
(5 welds on outer surface and 2 welds on inner surface). 9 stainless
steel laminations were welded to the lead end side of the straight
section yoke, and 21 on the non-lead end. Stainless steel modified yoke
laminations were used for both lead and non-lead ends to cover the end
cans. Figure 7.1.1 shows the design length and the layout of the yoke
laminations during assembly. Actual length between end cans was 5226mm,
5mm shorter than the design, primarily due to coil shrinkage after
curing. The actual total coil length is therefore also shorter than the
design by a similar amount.

![](media/image24.wmf){width="5.908333333333333in"
height="3.7319444444444443in"}

Figure 7.1.1: Yoke Assembly Configuration Before Welding

# 

# 7.2 Welding:

The skin alignment key was 26.5 mm wide for MQXB06, as are all the long
magnets. The 26.5-mm wide skin alignment key leaves a gap of 3mm (.12
in.) between the upper yoke and the upper skin; also a 3mm (.12 in.) gap
between the lower yoke pack and skin alignment key. The total gap
allowed for weld shrinkage is 6mm (.24 in.).

The magnet was compressed in the contact tooling with a hydraulic press
pump pressure of 4MPa (600 PSI) during welding, corresponding to a force
of about 23700 kg/meter (16000 lbs./ft) of magnet length. A pressure
above 3.3MPa (500 PSI) must be applied to completely collapse the
springs in the wheel units of the bottom tooling. First a fusion pass,
then, consecutively, four filler passes were applied. After welding, the
skin was cut to length, and the end plates were welded.

7.3 Outside Diameter Measurements:

Skin outside diameter measurements were taken at different angles after
welding the end plates, at the angles shown in Figure 7.3.1. Data and
plots are shown in Table 7.3.1 and Figure 7.3.2 (values in mm).

![](media/image25.wmf){width="3.2395833333333335in"
height="2.532638888888889in"}

Figure 7.3.1: Yoke Outside Diameter Measurement Positions

![](media/image26.wmf){width="4.090277777777778in"
height="1.6236111111111111in"}

Table 7.3.1: MQXB06 yoke outer diameter according to micrometer
measurements taken at different angular positions between skin alignment
keys

![](media/image27.wmf){width="4.603472222222222in"
height="2.6395833333333334in"}

Figure 7.3.2: Yoke Outer Diameter Measurements Plotted

7.4 Twist Measurements:

The twist in the cold-mass assembly after welding the skin and the end
plates was measured on a granite table with a level and is shown in
Figure 7.4.1. The twist was measured to be 0.080 milli-radians per meter
in the straight section of the magnet (rms). The allowed twist for the
MQXB Cold Mass is less than 0.2 milli-radians per meter.

![](media/image28.wmf){width="4.195138888888889in"
height="3.1055555555555556in"}

Fig 7.4.1: MQXB06 Cold Mass Assembly Twist Measurements

# 7.5 Straightness Measurements

Straightness of the yoke in both the vertical and horizontal axis is
taken by measuring the distance between the skin surface and a stretched
wire. Measurement positions are described in Figure 7.5.1 and shown for
MQXB06 below in Table 7.5.1. The wire is stretched across the length of
the skin, touching on each end. Measurements are taken from the wire to
the skin. Positive numbers, therefore, in Table 7.5.1 represent
concavity on the surface noted. A straight or convex condition will
result in zero readings.

![](media/image29.wmf){width="2.722916666666667in"
height="2.4277777777777776in"}

###### Figure 7.5.1: Straightness Measurement Positions 

![](media/image30.wmf){width="2.915277777777778in"
height="3.7527777777777778in"}

###### 

###### Table 7.5.1: Straightness Measurements

# 7.6 Axial Loading (Bullets & Bolts):

The axial support system of the magnet is shown below in Figure 7.6.1:

![](media/image31.wmf){width="5.384722222222222in"
height="2.321527777777778in"}

# 

# Figure 7.6.1: Axial Support of the Cold Mass Assembly

End load is applied by hand tightening the bullets to the bullet preload
plate, then tightening the axial preload bolts to the specified amount.
As on all production magnets, strain gauges to read longitudinal load
were not used on MQXB06. Torque applied to bullets was established from
strain gauge readings of short models and the prototype. The complete
bullet tightening procedure is explained in FNAL document \#
5520-ES-369708, [Bullet Torque Specification for LHCIR Quad MQXB
Prototypes.]{.underline} Each of the four bolts are tightened with a
torque wrench, to 1200 inch-lbs. With that torque, each bolt applies
35.6 kN (8,000-lbs.) tension load to the magnet. As a result of the
loading of the magnet with bolts, the bullets are subjected to a
compressive load of 8.9 kN (2,000 lbs.) each. The total force applied to
the magnet is therefore 107 kN (24,000-lbs.) tension.

**8.0 Final Assembly**

# 8.1 Final Electrical Measurements

MQXB06 was hipotted coil to ground, heaters to ground and heaters to
coil at 5000 V. Coils were hipotted across midplanes at 3000V. Leakage
in all cases is required to be less than 3 μA. All tests were
successful. Hipot leakage values are shown in Table 8.1.1. In Table
8.1.1, coil to ground and quench protection heater (strip heater) to
ground measurements were taken after magnet was completed. The
quadrant-to-quadrant (midplane) measurements were taken slightly
earlier, before the quadrant splices were made, because this hipot
cannot be made after the quadrants are spliced together.

  ------------------------------------------- ---------------------------
  Hipot                                       Result

  Coil to Ground                              192nA at 5000V

  Strip heaters to Coil & Ground              140nA at 5000V

  Coils Q1 to Coils Q2 across midplane        412nA at 3000V

  Coils Q2 to Coils Q3 across midplane        73nA at 3000V

  Coils Q3 to Coils Q4 across midplane        179nA at 3000V

  Coils Q4 to Coils Q1 across midplane        355nA at 3000V
  ------------------------------------------- ---------------------------

# 

# Table 8.1.1. Cold Mass Hipotting Data

Final electrical data is shown in Table 8.1.2.

+----------------------+----------------+-------------+---------------+
|                      | Resistance     | Ls          | Q             |
|                      | ohms           |             |               |
|                      |                | mH          |               |
+----------------------+----------------+-------------+---------------+
| Q1 -- Quadrant total | 0.5715         | 3.3713      | 4.90          |
+----------------------+----------------+-------------+---------------+
| Q2 -- Quadrant total | 0.5719         | 3.3552      | 5.03          |
+----------------------+----------------+-------------+---------------+
| Q3 -- Quadrant total | 0.5756         | 3.3563      | 4.73          |
+----------------------+----------------+-------------+---------------+
| Q4 -- Quadrant total | 0.5729         | 3.3115      | 5.07          |
+----------------------+----------------+-------------+---------------+
|                      |                |             |               |
+----------------------+----------------+-------------+---------------+
|                      | Resistance     | Ls          | Q             |
|                      | ohms           |             |               |
|                      |                | mH          |               |
+----------------------+----------------+-------------+---------------+
| Magnet Total         | 2.293          | 13.2834     | 5.15          |
+----------------------+----------------+-------------+---------------+

Table 8.1.2: Magnet Resistance, L and Q measurements.

Heater resistances are shown in Table 8.1.3:

  -------------------------------------- --------------------------------
  Strip Heater                           Resistance ohm

  Circuit A                              19.97

  Circuit B                              20.19
  -------------------------------------- --------------------------------

Table 8.1.3: Quench Protection (Strip) Heater resistance measurements

# 8.2 Mechanical Measurements

Design and actual finished longitudinal dimensions of the MQXB06 cold
mass are shown in Figures 8.2.1 and 8.2.2. Figure 8.2.2 shows the
longitudinal position of the magnetic center, from the measurements
described at the end of Section 5.3.

![](media/image32.wmf){width="5.996527777777778in"
height="5.948611111111111in"}

Figure 8.2.1: Design Dimensions of MQXB06

![](media/image33.wmf){width="5.997222222222222in"
height="4.959722222222222in"}

Figure 8.2.2: As-built Measured Dimensions of MQXB06

**9.0 Discrepancies and Comments**

Through MQXB05, a specific hipot failure (coil-to-ground, outer coil
pole turn to collar laminations, where the collars end and the end
clamps begin) occurred many times. (See section 9 of the P1, MQXB01 and
MQXB02, MQXB04 and MQXB05 Fabrication Reports). The root cause of the
problem, not discovered until the fabrication of MQXB05, was that solder
had, during the cable splice perform tinning process, flowed or "wicked"
into the area that is eventually covered by collar laminations, causing
this area to short to the laminations. A detailed explanation of the
problem and solution can be found in section 9.0 of the MQXB05
Fabrication Report.

This solution (shortening the amount of tinned area), although
acceptable for magnets beginning with MQXB07, did not work for MQXB05 or
MQXB06, because the problem was not discovered after the coils for these
magnets were already fabricated. An alternate solution was needed.
Therefore, for MQXB05 and MQXB06 only, the collar lamination pack in the
area of failure was relieved on all four lead end quadrants. The area at
the end of the pack, where the lead enters, is relieved by about 1mm,
tapering down to zero at about 1 cm into the pack. With the packs
relieved, the magnets passed hipot.

An inconsistency exists between the collar deflection measurements and
the coil size measurements of MQXB06. A detailed explanation can be
found in Section 5.3 of this report.

Whenever an anomalous situation occurs during the construction of a
magnet, a discrepancy report is filed. All discrepancy reports filed
during the construction of the MQXB06 cold mass are listed in Table
9.0.1. Complete reports, with their dispositions and corrective actions,
can be obtained from the FNAL Technical Division Process Engineering
Department.

  ------------ ----------------- -----------------------------------------
  **DRNo**     **Component SN**  **Discrepancy Description**

  HGQ-0346     MQXBi-044         Coil measurement data unreadable after
                                 position 32 during the original sizing
                                 operation. Coil needs to be re-measured.

  HGQ-0348     MQXBC-006         Non-Lead End of ground wrap layer #2
                                 (MC-369624) on quadrant #2 was cut
                                 incorrectly during installation. Layer
                                 was cut to recess into non-lead end key,
                                 but the first flaps were not left to
                                 cover midplane area of coils.

  HGQ-0350     MQXB06            The Collared Coil will not fit into the
                                 Bottom Yoke Packs. Yoke packs 363588 &
                                 369828 are too long. 363588 is 3 lams
                                 larger than tolerance and 369828 is 2-3
                                 lams larger than tolerance.

  HGQ-0357     MQXB06            Lead End preload plate has to be modified
                                 so heater wires won\'t be pinched.
  ------------ ----------------- -----------------------------------------

Table 9.0.1 MQXB06 Discrepancy Reports