**[GOAL]{.underline}:** List the design features, constraints, and
reasons for LBNL's "state-of-the-art" Interaction-Region Quadrupole
magnet.

**[Contents]{.underline}:** The design features are separated according
to construction stage:

A.  Magnet Performance

B.  Winding Preparation.

C.  Winding.

D.  Reaction.

E.  Potting Preparation.

F.  Potting.

G.  Prestress.

+-----------------+-------+----------+---------------------------------+
| **A. Magnet     |       |          |                                 |
| Performance:**  |       |          |                                 |
+-----------------+-------+----------+---------------------------------+
| **Parameter**   | **Va  |          | **Reason/Remarks**              |
|                 | lue** |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 1.  Type:       | I-R   |          | "State-of-the-art" LHC I-R      |
|                 | Quadr |          | upgrade option.                 |
|                 | upole |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 2.  Bore        | 70mm  |          | LHC spec.                       |
|     Diameter:   |       |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 3.  Outer       |       |          | Match FNAL's I-R iron spec..    |
|     Diameter:   |       |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 4.  Length:     |       |          | Match FNAL's I-R iron spec..    |
+-----------------+-------+----------+---------------------------------+
| 5.  Gradient:   | 3     |          | Conductor limit.                |
|                 | 00T/m |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 6.  Multipole   | b2=   |          |                                 |
|     Limits:     |       |          |                                 |
|                 | b3=   |          |                                 |
|                 |       |          |                                 |
|                 | b4=   |          |                                 |
|                 |       |          |                                 |
|                 | b5=   |          |                                 |
+-----------------+-------+----------+---------------------------------+

+-----------------+-------+----------+---------------------------------+
| **B. Winding    |       |          |                                 |
| Preparation:**  |       |          |                                 |
+-----------------+-------+----------+---------------------------------+
| **Parameter**   | **Va  |          | **Reason/Remarks**              |
|                 | lue** |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 1.  Conductor:  | Hi Jc |          | Consistent with 16T mission.    |
|                 | NbSn  |          |                                 |
|                 |       |          | Availability, cost.             |
|                 | d =   |          |                                 |
|                 | 0     |          | Availability, cost.             |
|                 | .81mm |          |                                 |
|                 | ??    |          |                                 |
|                 |       |          |                                 |
|                 | Cu/   |          |                                 |
|                 | NonCu |          |                                 |
|                 | =     |          |                                 |
|                 | 0.8?? |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 2.  Cable:      | Angle |          | Improved stacking, without      |
|                 | = 0.5 |          | degradation.                    |
|                 | d     |          |                                 |
|                 | eg.?? |          | High modulus coil, without      |
|                 |       |          | degradation.                    |
|                 | De    |          |                                 |
|                 | nsity |          |                                 |
|                 | =     |          |                                 |
|                 | 0.    |          |                                 |
|                 | 92%?? |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 3.  Insulation: | S-G   |          | Like D20.                       |
|                 | lass. |          |                                 |
|                 |       |          | Like D20.                       |
|                 | Sh    |          |                                 |
|                 | eath. |          | Like D20.                       |
|                 |       |          |                                 |
|                 | Thk = |          | Carbon reduction, like D20.     |
|                 | 125   |          |                                 |
|                 | mmm?? |          | Boils without decomposing or    |
|                 |       |          | reacting.                       |
|                 | S     |          |                                 |
|                 | tarch |          |                                 |
|                 | Repla |          |                                 |
|                 | ced?? |          |                                 |
|                 |       |          |                                 |
|                 | Pal   |          |                                 |
|                 | matic |          |                                 |
|                 | A     |          |                                 |
|                 | cid?? |          |                                 |
+-----------------+-------+----------+---------------------------------+
| 4.  Winding     | SS    |          | Strength.                       |
|     Mandrel:    |       |          |                                 |
|                 | Glass |          | No shorts during winding or     |
|                 | wra   |          | reaction.                       |
|                 | pped. |          |                                 |
|                 |       |          | Radial breathing during         |
|                 | Azim  |          | reaction pumping.               |
|                 | uthal |          |                                 |
|                 | gro   |          |                                 |
|                 | oves. |          |                                 |
+-----------------+-------+----------+---------------------------------+

+-------------+----+------------------+------------------------------+
| **C.        |    |                  |                              |
| Winding:**  |    |                  |                              |
+-------------+----+------------------+------------------------------+
| **          |    | **Value**        | **Reason/Remarks**           |
| Parameter** |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 1.  Pole    |    | Al-Bronze??      | Tightens coil during         |
|             |    |                  | reaction.                    |
|   Material: |    |                  |                              |
|             |    |                  | Reduce Kirch'l.-voids at     |
|             |    |                  | high-stress pts.             |
|             |    |                  |                              |
|             |    |                  | Low-stress reaction          |
|             |    |                  | cool-down.                   |
+-------------+----+------------------+------------------------------+
| 2.  Pole    |    | 1??              | Strong pole support. Easy    |
|             |    |                  | alignment.                   |
|   Segments: |    | No gaps??        |                              |
|             |    |                  | Cool-down space collects at  |
|             |    | 2-Layer??        | return end.                  |
|             |    |                  |                              |
|             |    |                  | Support transition better.   |
+-------------+----+------------------+------------------------------+
| 3.  W       |    | Compressed lap?  | More axial strength (no      |
| edge/Spacer |    |                  | gaps).                       |
|             |    |                  |                              |
|    Trans'n: |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 4.  E       |    | Layer/layer      | Better end-conductor radial  |
| nd-Spacers: |    | bridging.        | placement.                   |
|             |    |                  |                              |
|             |    | 2-Piece          | Non-scuff insertion.         |
|             |    | (interlocked)    |                              |
|             |    |                  | Solid, bridged, non-slip     |
|             |    | Wcable + 0.005?? | ends.                        |
+-------------+----+------------------+------------------------------+
| 5.          |    | High-temp        | Better control of azimuthal  |
|  Pole/wedge |    | oxide??          | size.                        |
|             |    |                  |                              |
| Insulation: |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 6.          |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 7.  Heater: |    | .001" x .125" SS | Easy availability.           |
|             |    |                  |                              |
|             |    | 2-5" diagonal    | Anti-fold cable-width        |
|             |    | hairpins.        | foot-print.                  |
|             |    |                  |                              |
|             |    | 2.5 ohm/strip.   | Series, for decent match to  |
|             |    |                  | P.S.                         |
|             |    | dP/dA(50A) =     |                              |
|             |    | 410W/cm^2^       | Need more than 500W/cm^2^??  |
|             |    |                  |                              |
|             |    | 2                | Redundant heaters (safety)   |
|             |    | strips/quadrant. |                              |
|             |    |                  | Remove Kapton thermal delay. |
|             |    | Glass/epoxy      |                              |
|             |    | insulated.       | Take out both layers with    |
|             |    |                  | one heater.                  |
|             |    | Between layers.  |                              |
|             |    |                  | 2-fold redundancy.           |
|             |    | Dual @ Max.      |                              |
|             |    | Bfield           |                              |
+-------------+----+------------------+------------------------------+
| 8.          |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 9.  L       |    | 2                | Coil + prestress to fit      |
| ayers/Coil: |    |                  | within LHC Fe yoke.          |
+-------------+----+------------------+------------------------------+
| 10.         |    | No splice.       | Cheaper, more reliable than  |
| Layer-Layer |    |                  | splices.                     |
|             |    | Hard-way bend.   |                              |
| Transition: |    |                  | Cheaper, more reliable than  |
|             |    | High-pressure.   | D20.                         |
|             |    |                  |                              |
|             |    |                  | Min. rel. strain during      |
|             |    |                  | reaction-cooling.            |
+-------------+----+------------------+------------------------------+
| 11. Splice  |    | Hard + Easy.     | Like D20.                    |
|             |    |                  |                              |
| Transition: |    | No pinch!!       | Avoid D20 damage problem.    |
|             |    |                  |                              |
|             |    | Good support.    | Avoid D20 training problem.  |
+-------------+----+------------------+------------------------------+
| 12. Vtaps   |    | 32               | Good localization of         |
|     (       |    |                  | training quenches.           |
| pole-turn): |    | 4/layer          |                              |
|             |    |                  | Segments: FS,RE, RS, LE.     |
+-------------+----+------------------+------------------------------+
| 13. Vtaps   |    | 16               | Improve ramp-rate            |
|     (multi  |    |                  | quench-origins.              |
|     turn):  |    | 2/layer??        |                              |
|             |    |                  | Segments: T2, MT, MP.        |
|             |    | Lead-end.        |                              |
|             |    |                  | Easy access.                 |
+-------------+----+------------------+------------------------------+
| 14. V tap   |    | .001" x .020" SS | Tough.                       |
|     Traces: |    |                  |                              |
|             |    | Full length??    | Avoid connection problems    |
|             |    |                  | after reaction.              |
|             |    | Glass insulated. |                              |
|             |    |                  | Survive reaction.            |
+-------------+----+------------------+------------------------------+
| 15.         |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 16. Coil    |    | 2                | Fewer reaction cycles than   |
| s/Reaction: |    |                  | D20.                         |
+-------------+----+------------------+------------------------------+
| 17          |    | Solid SS.        | Accurate midplane conductor  |
| . Mid-plane |    |                  | placement.                   |
|     Spacers |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 18.         |    |                  |                              |
+-------------+----+------------------+------------------------------+
| 19.         |    |                  |                              |
+-------------+----+------------------+------------------------------+

+-------------+-------+----------------+------------------------------+
| **D.        |       |                |                              |
| Reaction:** |       |                |                              |
+-------------+-------+----------------+------------------------------+
| **          |       | **Value**      | **Reason/Remarks**           |
| Parameter** |       |                |                              |
+-------------+-------+----------------+------------------------------+
| 1.          |       | Less than D20. | Fewer insulation failures    |
|   Azimuthal |       |                | than D20.                    |
|             |       | 2000 psi ??    |                              |
|   Pressure: |       |                | As high as practical for     |
|             |       | ??             | high modulus                 |
|             |       |                |                              |
|             |       | SS wire-wrap.  | Kirchendahl void reduction   |
|             |       |                | at stress pts.               |
|             |       |                |                              |
|             |       |                | Back-off pressure after      |
|             |       |                | bronze-phases.               |
+-------------+-------+----------------+------------------------------+
| 2.  Coil    |       | Loaded to      | Dense, precise conductor     |
|     Size    |       | stops.         | placement.                   |
|             |       |                |                              |
|    Control: |       |                |                              |
+-------------+-------+----------------+------------------------------+
| 3.  Axial   |       | 1000 psi ??    | More compact ends than D20.  |
|     Coi     |       |                |                              |
| l-Pressure: |       | Relieve at     | Protect conductor.           |
|             |       | cooldn.        |                              |
+-------------+-------+----------------+------------------------------+
| 4.  D       |       | Rc, Rl, Tc,    | Obtain complete record of    |
| iagnostics: |       | To, Po, RGA    | reaction.                    |
|             |       |                |                              |
|             |       |                | Enable intelligent QA        |
|             |       |                | decisions.                   |
+-------------+-------+----------------+------------------------------+
| 5           |       | Argon,         | Same as D20.                 |
| .  Reaction |       | (Liq.Ar).      |                              |
|             |       |                |                              |
| Atmosphere: |       |                |                              |
+-------------+-------+----------------+------------------------------+
| 6.  Carbon  |       | Periodic       | Limited-duration pumping of  |
|             |       | flush??        | inner-bore.                  |
|   Reduction |       |                |                              |
|     Method: |       |                |                              |
+-------------+-------+----------------+------------------------------+
| 7.          |       | Pinned poles?? | Permanent & strong.          |
|  Inter-Ramp |       |                |                              |
|             |       | Extra          | Extra local friction.        |
| Protection: |       | Pressure??     |                              |
+-------------+-------+----------------+------------------------------+
| 8.  Pole    |       | Key/Slots      | Maintain azimuthal alignment |
|             |       |                |                              |
|  Alignment: |       | +/- 0.001"     | Allow axial slippage.        |
+-------------+-------+----------------+------------------------------+
| 9.          |       |                |                              |
+-------------+-------+----------------+------------------------------+
| 10.         |       |                |                              |
+-------------+-------+----------------+------------------------------+

+----------------------+---+-----------+------------------------------+
| **E. Potting         |   |           |                              |
| Preparation:**       |   |           |                              |
+----------------------+---+-----------+------------------------------+
| **Parameter**        | * |           | **Reason/Remarks**           |
|                      | * |           |                              |
|                      | V |           |                              |
|                      | a |           |                              |
|                      | l |           |                              |
|                      | u |           |                              |
|                      | e |           |                              |
|                      | * |           |                              |
|                      | * |           |                              |
+----------------------+---+-----------+------------------------------+
| 1.  Mid-Plane        | K |           | Rugged & stiff.              |
|     Insulation:      | a |           |                              |
|                      | p |           | Insurance.                   |
|                      | t |           |                              |
|                      | o |           | Insurance.                   |
|                      | n |           |                              |
|                      |   |           |                              |
|                      | 1 |           |                              |
|                      | 2 |           |                              |
|                      | 5 |           |                              |
|                      | m |           |                              |
|                      | m |           |                              |
|                      | m |           |                              |
|                      | ? |           |                              |
|                      | ? |           |                              |
|                      |   |           |                              |
|                      | 2 |           |                              |
|                      | - |           |                              |
|                      | l |           |                              |
|                      | a |           |                              |
|                      | y |           |                              |
|                      | e |           |                              |
|                      | r |           |                              |
|                      | s |           |                              |
|                      | ? |           |                              |
|                      | ? |           |                              |
+----------------------+---+-----------+------------------------------+
| 2.  Vtaps (splice)   | 2 |           | Good, low-noise splice       |
|     \[16\]:          | ( |           | resistance.                  |
|                      | T |           |                              |
|                      | - |           |                              |
|                      | P |           |                              |
|                      | ) |           |                              |
|                      | / |           |                              |
|                      | s |           |                              |
|                      | p |           |                              |
|                      | l |           |                              |
|                      | i |           |                              |
|                      | c |           |                              |
|                      | e |           |                              |
+----------------------+---+-----------+------------------------------+
| 3.  Vtap Traces:     | K |           | Insulation, low inductance.  |
|                      | a |           |                              |
|                      | p |           |                              |
|                      | t |           |                              |
|                      | o |           |                              |
|                      | n |           |                              |
|                      | / |           |                              |
|                      | S |           |                              |
|                      | S |           |                              |
|                      | / |           |                              |
|                      | K |           |                              |
|                      | a |           |                              |
|                      | p |           |                              |
|                      | t |           |                              |
|                      | o |           |                              |
|                      | n |           |                              |
+----------------------+---+-----------+------------------------------+
| 4.  Vtap Wires       | T |           | Low-Noise.                   |
|     \[64\]:          | w |           |                              |
|                      | i |           |                              |
|                      | s |           |                              |
|                      | t |           |                              |
|                      | e |           |                              |
|                      | d |           |                              |
|                      | - |           |                              |
|                      | p |           |                              |
|                      | a |           |                              |
|                      | i |           |                              |
|                      | r |           |                              |
+----------------------+---+-----------+------------------------------+
| 5.                   |   |           |                              |
+----------------------+---+-----------+------------------------------+
| 6.  Pole gages       | 1 |           | Advance technology.          |
|     (capacitor):     | / |           |                              |
|                      | p |           |                              |
|                      | o |           |                              |
|                      | l |           |                              |
|                      | e |           |                              |
|                      | / |           |                              |
|                      | l |           |                              |
|                      | a |           |                              |
|                      | y |           |                              |
|                      | e |           |                              |
|                      | r |           |                              |
+----------------------+---+-----------+------------------------------+
| 7.  M-P gages        | 1 |           | Advance technology.          |
|     (capacitor):     | / |           |                              |
|                      | p |           |                              |
|                      | o |           |                              |
|                      | l |           |                              |
|                      | e |           |                              |
|                      | / |           |                              |
|                      | l |           |                              |
|                      | a |           |                              |
|                      | y |           |                              |
|                      | e |           |                              |
|                      | r |           |                              |
+----------------------+---+-----------+------------------------------+
| 8.  Pole gages       | 1 |           | Cross-calibration of         |
|     (resistive):     | / |           | capacitor gauges.            |
|                      | p |           |                              |
|                      | o |           |                              |
|                      | l |           |                              |
|                      | e |           |                              |
|                      | / |           |                              |
|                      | l |           |                              |
|                      | a |           |                              |
|                      | y |           |                              |
|                      | e |           |                              |
|                      | r |           |                              |
+----------------------+---+-----------+------------------------------+
| 9.  Strain-gauge     | T |           | Low-Noise.                   |
|     Wires:           | w |           |                              |
|                      | i |           |                              |
|                      | s |           |                              |
|                      | t |           |                              |
|                      | e |           |                              |
|                      | d |           |                              |
|                      | - |           |                              |
|                      | p |           |                              |
|                      | a |           |                              |
|                      | i |           |                              |
|                      | r |           |                              |
+----------------------+---+-----------+------------------------------+
| 10. Thermometers:    | 1 |           | Splice temperatures.         |
|                      | / |           |                              |
|                      | s |           | Reliable, local              |
|                      | p |           | temperatures.                |
|                      | l |           |                              |
|                      | i |           | B-independent.               |
|                      | c |           |                              |
|                      | e |           | Low cost, calibrated during  |
|                      | . |           | cool-down.                   |
|                      |   |           |                              |
|                      | E |           |                              |
|                      | m |           |                              |
|                      | b |           |                              |
|                      | e |           |                              |
|                      | d |           |                              |
|                      | d |           |                              |
|                      | e |           |                              |
|                      | d |           |                              |
|                      | ( |           |                              |
|                      | S |           |                              |
|                      | t |           |                              |
|                      | y |           |                              |
|                      | c |           |                              |
|                      | a |           |                              |
|                      | s |           |                              |
|                      | t |           |                              |
|                      | ) |           |                              |
|                      | . |           |                              |
|                      |   |           |                              |
|                      | C |           |                              |
|                      | e |           |                              |
|                      | r |           |                              |
|                      | n |           |                              |
|                      | o |           |                              |
|                      | x |           |                              |
|                      | . |           |                              |
|                      |   |           |                              |
|                      | U |           |                              |
|                      | n |           |                              |
|                      | c |           |                              |
|                      | a |           |                              |
|                      | l |           |                              |
|                      | i |           |                              |
|                      | b |           |                              |
|                      | r |           |                              |
|                      | a |           |                              |
|                      | t |           |                              |
|                      | e |           |                              |
|                      | d |           |                              |
|                      | . |           |                              |
+----------------------+---+-----------+------------------------------+
| 11. Large Axial-Gap  | I |           | Low cool-down shrinkage,     |
|     Filler:          | n |           | strong form-fit.             |
|                      | j |           |                              |
|                      | e |           |                              |
|                      | c |           |                              |
|                      | t |           |                              |
|                      | e |           |                              |
|                      | d |           |                              |
|                      | S |           |                              |
|                      | t |           |                              |
|                      | y |           |                              |
|                      | c |           |                              |
|                      | a |           |                              |
|                      | s |           |                              |
|                      | t |           |                              |
+----------------------+---+-----------+------------------------------+
| 12. Pre-pot          | K |           | Safer insertion into Al      |
|     azimuthal        | e |           | cylinder.                    |
|     prestress:       | v |           |                              |
|                      | l |           | Fluff removal (measure       |
|                      | a |           | during application).         |
|                      | r |           |                              |
|                      | - |           |                              |
|                      | w |           |                              |
|                      | r |           |                              |
|                      | a |           |                              |
|                      | p |           |                              |
|                      |   |           |                              |
|                      | 5 |           |                              |
|                      | 0 |           |                              |
|                      | 0 |           |                              |
|                      | p |           |                              |
|                      | s |           |                              |
|                      | i |           |                              |
|                      | ( |           |                              |
|                      | a |           |                              |
|                      | z |           |                              |
|                      | i |           |                              |
|                      | m |           |                              |
|                      | u |           |                              |
|                      | t |           |                              |
|                      | h |           |                              |
|                      | a |           |                              |
|                      | l |           |                              |
|                      | ) |           |                              |
+----------------------+---+-----------+------------------------------+
| 13. Pole alignment   | 0 |           | Strong enough for alignment  |
|     radial shim:     | . |           | accuracy.                    |
|                      | 1 |           |                              |
|                      | 2 |           | Minimum shrinkage & strong.  |
|                      | 5 |           |                              |
|                      | " |           | Decrease epoxy shrinkage &   |
|                      |   |           | stiffen shell.               |
|                      | B |           |                              |
|                      | r |           |                              |
|                      | o |           |                              |
|                      | n |           |                              |
|                      | z |           |                              |
|                      | e |           |                              |
|                      | . |           |                              |
|                      |   |           |                              |
|                      | P |           |                              |
|                      | o |           |                              |
|                      | w |           |                              |
|                      | d |           |                              |
|                      | e |           |                              |
|                      | r |           |                              |
|                      | e |           |                              |
|                      | d |           |                              |
|                      | A |           |                              |
|                      | l |           |                              |
|                      | ~ |           |                              |
|                      | 2 |           |                              |
|                      | ~ |           |                              |
|                      | O |           |                              |
|                      | ~ |           |                              |
|                      | 3 |           |                              |
|                      | ~ |           |                              |
+----------------------+---+-----------+------------------------------+
| 14. Axial fluff      | E |           |                              |
|     removal:         | n |           |                              |
|                      | d |           |                              |
|                      | - |           |                              |
|                      | b |           |                              |
|                      | o |           |                              |
|                      | l |           |                              |
|                      | t |           |                              |
|                      | s |           |                              |
|                      | / |           |                              |
|                      | e |           |                              |
|                      | n |           |                              |
|                      | d |           |                              |
|                      | p |           |                              |
|                      | l |           |                              |
|                      | a |           |                              |
|                      | t |           |                              |
|                      | e |           |                              |
|                      | . |           |                              |
|                      |   |           |                              |
|                      | 5 |           |                              |
|                      | 0 |           |                              |
|                      | 0 |           |                              |
|                      | p |           |                              |
|                      | s |           |                              |
|                      | i |           |                              |
|                      | . |           |                              |
+----------------------+---+-----------+------------------------------+
| 15.                  |   |           |                              |
+----------------------+---+-----------+------------------------------+

+------------+---------+-------------+--------------------------------+
| **F.       |         |             |                                |
| Potting:** |         |             |                                |
+------------+---------+-------------+--------------------------------+
| **P        |         | **Value**   | **Reason/Remarks**             |
| arameter** |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 1.  Number |         | 4           | Fewer pottings.                |
|     of     |         |             |                                |
|     coil   |         | Monolithic  | No gaps, no fluff.             |
| s/potting: |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 2.         |         | SS, 304 ??  | Clean, clear, armoured bore of |
| Bore-Tube: |         |             | known ID.                      |
|            |         |             |                                |
|            |         |             | No release operation required. |
+------------+---------+-------------+--------------------------------+
| 3.         |         | 1mm ??      | Partially protect inner        |
|  Bore-Tube |         |             | conductor from radial          |
|            |         |             | hydrostatic pressure gradient. |
| Thickness: |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 4.         |         | Al          | Prestress (axial & azimuthal)  |
| Outer-Tube |         |             | on cool-down.                  |
|            |         |             |                                |
|  Material: |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 5.         |         | ??          | Thick enough to provide        |
| Outer-Tube |         |             | prestress.                     |
|            |         |             |                                |
| Thickness: |         |             | Thin enough to fit into        |
|            |         |             | existing iron.                 |
+------------+---------+-------------+--------------------------------+
| 6.  Outer  |         | Slip fit.   | Minimum radial fluff.          |
|            |         |             |                                |
|  Assembly: |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 7.  Epoxy  |         | 1E-5 Torr   | Clean surfaces.                |
|     pr     |         |             |                                |
| eparation: |         | Baked.      | HC & H~2~O free.               |
+------------+---------+-------------+--------------------------------+
| 8.  Epoxy  |         | Vacuum (    | Good impregnation.             |
|     Imp    |         |             |                                |
| regnation: |         | 1/10 Atm.   | Minimize bubbles.              |
+------------+---------+-------------+--------------------------------+
| 9.  Epoxy: |         | Wang        | More fluid like. Less cracking |
|            |         |             | and training.                  |
+------------+---------+-------------+--------------------------------+
| 10. Curing |         | 300 Atm     | Smaller bubbles.               |
|            |         |             |                                |
|  Pressure: |         |             | Breakdown insurance.           |
|            |         |             |                                |
|            |         |             | Initial prestress of Alum.     |
|            |         |             | shell.                         |
+------------+---------+-------------+--------------------------------+
| 11.        |         | 15mm        | Provide adequate cooling       |
|  NbSn/NbTi |         |             |                                |
|            |         |             |                                |
|  Exposure: |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 12.        |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 13.        |         |             |                                |
+------------+---------+-------------+--------------------------------+
| 14.        |         |             |                                |
+------------+---------+-------------+--------------------------------+

+--------------+-------+-------------+--------------------------------+
| **G.         |       |             |                                |
| Prestress:** |       |             |                                |
+--------------+-------+-------------+--------------------------------+
| *            |       | **Value**   | **Reason/Remarks**             |
| *Parameter** |       |             |                                |
+--------------+-------+-------------+--------------------------------+
| 1            |       | Aluminum    | Less creep when warm.          |
| .  Prestress |       |             |                                |
|     Device:  |       | 1.125"      | Maximum allowed by Fe          |
|              |       | wall.       |                                |
|              |       |             | Less clean-up after potting.   |
|              |       | Potting     |                                |
|              |       | cylinder.   |                                |
+--------------+-------+-------------+--------------------------------+
| 2            |       | 300 Atm     | Prestress Al cylinder.         |
| .  Azimuthal |       | (Cure).     |                                |
|     (warm):  |       |             |                                |
+--------------+-------+-------------+--------------------------------+
| 3.  Axial    |       | End-bolts   | Fluff-removal.                 |
|     (warm):  |       | (wrt.       |                                |
|              |       | shell).     | Prestress Al cylinder.         |
|              |       |             |                                |
|              |       | 2000psi     |                                |
|              |       | Cure.       |                                |
+--------------+-------+-------------+--------------------------------+
| 4.  Azim     |       | Thermal-Di  | High pressure applied only     |
| uthal(cold): |       | fferential. | when cold.                     |
+--------------+-------+-------------+--------------------------------+
| 5.           |       | Thermal-Di  | High pressure applied only     |
| Axial(cold): |       | fferential. | when cold.                     |
+--------------+-------+-------------+--------------------------------+
| 6.           |       |             |                                |
+--------------+-------+-------------+--------------------------------+
| 7.           |       |             |                                |
+--------------+-------+-------------+--------------------------------+
| 8.           |       |             |                                |
+--------------+-------+-------------+--------------------------------+