Main Ring Magnet system
Magnet design &Field measurements
Installa;onSurvey & alignment
K. Egawa
H.Iinuma
M. Masuzawa
Y. Ohsawa

Power supply designTes;ngTuning
Installa;on & Cabling
T. Adachi
T. OkiT. Sueno
N. Tokuda
T. Kawamoto

Re;red but s;ll ac;ve
R. Sugahara
K. Tsuchiya
2014/3/3

Eleven people
including seniormembers
Magnet Review 20141

Since last review

1. In the tunnel•Magnet installa;on to the Tsukuba sec;on.
•~60 dipoles, ~100 quadrupoles almost done.
•Sextupole magnets and steering magnets in FY2014.
•Top part of the LER magnets in the arc sec;ons removed for vacuum
chamber installa;on (and put the magnets back together again).
~500 magnets, done.
•LER horizontal steering magnet installa;on (~200) in the arc sec;on almost done.
•HER ver;cal/horizontal steering magnet installa;on (~400) in the arc sec;on almostdone.
LER
magnet in the arc sec;onExample of top part removed•Survey and 1st round alignment of the magnets in the tunnel are almost done.
⇒Tunnel temperature is 16 degree at places, ~10 degree lower than during theopera;on, which aﬀects the alignment.
•Skew winding completed for all the sextupole magnets (~200).
•Cabling work of Power supply con;nues.
2. More fabrica7on•Skew quads, IR magnets are ongoing.
•Til;ng support for 24 sextupole magnets were fabricated.
•24 KEKB sextupole magnets were modiﬁed to ﬁt in the ;l;ng support.
3. Field measurement
4. Manufacture and overhaul of Power supplies
Magnet Review 20142
5. 2014/3/3
And more.

1.In the tunnel

2014/3/3

Magnet Review 2014

3

Magnet installa;on in the Tsukuba
sec;on3/4/20132/6/2014

3/4/2013

2014/3/3

Magnet Review 2014

2/6/2014

4

Masuzawa

Magnet installa;on & alignment at the Tsukuba sec;on almost done
• ~60 dipoles, ~100 quadrupoles almost done.
• Very tough work…
• Work pace: 40minutes/Long Dipole  60m / week
• Two teams worked from the IP in clock and an;‐clockwise direc;ons.
•••

Horizontal posi;on is conﬁrmed
by Laser Tracker(LT）Slope is conﬁrmed by digital level
Height is conﬁrmed by N3 withlevel marker on the wall, and LT.

Sextupole magnets
and steering magnets
are going to beinstalled in FY2014.
2014/3/3

Magnet Review 2014

5

Alignment work is ongoing
Nikko wiggler alignment in a very ;ght space

SSC in HER

He pipe

Workers adjus;ng thebolts, in between themagnet and the pipe,
not easily seen.
2014/3/3

Magnet Review 2014

Alignment accuracy
depends on temperature!!
…However, tunnel
temperature is 16 degree
at places, ~10 degree
lower than during theopera;on, which aﬀects
the alignment.

Linear coeﬃcient ofexpansion 10‐5 (1/°C)
Iron,concrete
6

Alignment work is ongoing, but…

OhsawaDiﬃcult to coexist with the heavy duty construc;on work above ground.
Eﬀects of construc;on of the new u;lity buildings and new tunnel are clearly seen.

12M

AR new tunnel

AR new tunnel
Level Diﬀ.
from Oct.
to Dec.

1.3mm

DNA03

2014/3/3
Magnet Review 2014
Nikko
wiggler alignment in a very ;ght space

7

Consistent measurement by HLS

Kawamoto
AdachiHydrosta;c Leveling System+1.0mm1mm+0.5mmDay from
2013.6.25 to2014.2.24

0.0mm‐0.5mmS(level change by 1.5mm�omm) fr

1617
20 to00

S=1650m
Feb.24

Dec.10

Oct.13

2014/3/3

Day from2013.6.25 toMagnet Review 20142014.2.24

Sep.2

S (m) from 1620 to 1700

8

Sep. 2, 2013�

2014/3/3

2.7 mmDec. 10,2013�

Oct. 13,2013�

Feb. 24,2014�

We really worry how diﬃcult a situa;on wewill encounter withﬁnal,
Magnetthe
Review
2014ﬁne alignment.

9

Alignment work is ongoing, but…

OhsawaDiﬃcult to coexist with the heavy duty construc;on work above ground.
Eﬀects of construc;on of the new u;lity buildings and new tunnel are clearly seen.
(1)Eﬀects of new u;lity building “3M” have started toshow.
(2)Concrete blocks have been placed in the new AR tunnel,
which caused the KEKB tunnel to sink.
AR new tunnel

Level Diﬀ.
from Dec. toFeb.
6 mmTunnel level change between Dec. 2013
Nikko wiggler alignment in a very ;ght space and Feb. 2014 NEW!!! (very preliminary)
2014/3/3

Magnet Review 201410

I have this plot several hours ago.
And I do not know what to say now.
AR new tunnel
Level Diﬀ.
from Oct. toDec.

3M

Level Diﬀ.
from Dec. toFeb.

Keepwatching!!
2014/3/3

Magnet Review 201411

Cooling water pipes, power cables
Can you count how
many wigglers inthe line?

Part of the cooling water pipe lines
being installed.
(not connected to the individual
2014/3/3smagnets yet)Power cables between wiggler magnets have beenconnected in the Oho and Nikko straight sec;ons.
Wiggler polarity has been checked.
Magnet Review 201412

Power cable work for the Tsukuba
straight sec;on magnets

2014/3/3

Magnet Review 201413

2. More fabrica7on•Skew quads, IR magnets are ongoing: 60 magnets in total.
•Til;ng support for 24 sextupole magnets were fabricated.
•24 KEKB sextupole magnets were modiﬁed to ﬁt in the ;l;ng support.

2014/3/3

Magnet Review 201414

Iinuma, Masuzawa

Near IR Magnet produc;on status (BL* and QLC2*)~3.6 m long dipole

Two quadrupoles (QLC2LE/QLC2RE)

Coils are ready for assembly, which
Yoke was sent towill take place 1st week of March.
machining company.
Coils have been moldedand electrical tests areongoing.

~2.2m Dipoles
All coils have been wound.
2 magnets (out of 4) have been assembled.

6 dipole magnets and 2 quadrupole magnets will be transported by air in March.
2014/3/3

Magnet Review 201415

Near IR Magnet produc;on status (QK* and BC* and etc.)

Small dipole magnets near the IP,
BC1LP and BC1RP arrived at KEK andwai;ng for the ﬁeld measurements.
Other small dipole magnets (BC*E) and etc.
are being fabricated and scheduled to be
shipped to KEK in the end of March.

All 16 (+1spare) Skew Quads(QK*)
arrived at KEK and the magne;cmeasurements completed.
2014/3/3

Magnet Review 2014

ZV* ×25

BCE* ×8 16

Sugahara, Masuzawa

Til;ng table for sextupole magnets produc;on andmagnet modiﬁca;on are almost completed

16 tables (of 24) arrived at KEK.

2014/3/3

Magnet Review 201424 KEKB sextupole magnets have been modiﬁed to ﬁt to the ;l;ng table.

17

Alignment of the ;lt axis to the magnet center
ongoing
Using an op;cal
scope to monitor themagnet center(crossed wires) as
the magnet is ;lted+/‐ 30 degree.
0.1mm φ wire spanned to indicate the magnet center.

From “normal” sextupole
to “skew” sextupole

2014/3/3

R.MagnetSugahara
Review 2014
Oﬃcially re;red, but...

18

Special movie

2014/3/3

Magnet Review 201419

3.Field measurement

2014/3/3

Magnet Review 201420

Status of magnet fabrica7on and ﬁeld measurements
More than two thousand magnets
are now installed and alignedproperly.
We fabricate more than 500 new
magnets and measure magne;cﬁeld.
New magnets (not all)HER Qs×38

Magnet type
dipolequadruple
sextuple
wiggler
H, V Corrector
total

Number (new/reuse)
LER (e+)171 (125/46)
455 (27/428)
108 (0/108)
280 (168/112)
416(185,231)
1330 (405/925)

HER Q(1.12m)×3

Single pole wiggler×114

Half pole wiggler ×58
2014/3/3

LER Qw×20

HER Qx×9
Magnet Review 2014

Egawa

HER (e-)146 (23/123)
379 (61/318)
110 (10/100)
60 (22/38)
435(17,418)
1130 (133/997)

LER dipole (4m)×142

Skew Quads (QK*) ×1621

EgawaBrief look from ﬁeld measurement
BL [Tm]the Long‐harmonic system

6m‐long ﬂip coil system

BL histogramassuming the energy ra0o
ELER / EHER = 4 / 7

BL@center
No. of mag.
109
average1.0002983
standard
0.0001976
deviation

skbLB

reference
2014/3/3

mass‐measured
Magnet Review 2014

Good quality

22

mapping (new HER_Qs)

normal (u)twin coil probe

reverse (d)2014/3/3

Magnet Review 201423

B2[z] / B2[0]fine scalepole ends

2014/3/3

I (A)L_eﬀ_cor_u [mm]L_eﬀ_cor_d [mm]L_eﬀ_cor [mm]

500
100
200
300
400
500

566.65411
570.71851
570.66632
570.18652
569.0094
566.66705

566.64801
570.70844
570.61694
570.18695
569.00031
566.64032

566.65106
570.71344
570.64166
570.18677
569.00488
566.65369

Magnet Review 2014

es3ma3on fromharm‐coil [mm]570.72576
570.61746
570.12534
569.04067
566.91602

Good quality

24

Other new magnets to be measured. …
BLC*×6

QLC*×2

2014/3/3ZV* ×25

BCE* ×8

Magnet Review 2014

BCP*×225

4. Magnet Power Supply System

2014/3/3

Magnet Review 201426

Power supplies of SuperKEKB magnets-T. Adachi
T. OkiT. Sueno
N. Tokuda~ 2300 power supplies operated in KEKB. Most of them are reused in SuperKEKB. ~620 power supplies are overhauled.
~ 700 power supplies are manufactured for SuperKEKB asbelow.

output poweror current

FY2011FY2012FY2013

FY typical loads
20140.95 MW

2−−−

LER/HER Main Bends

0.4 - 1 MW

81−−

LER/HER Wigglers

2.4 - 50 kW

−

−102−

Local Bends, Quads, Sexts

0.5 - 0.8 kW−

29

100~100 Steering magnets, Correction coils

1.5 - 3 kW

−

−

−

~240 Solenoids against electron-cloud

800 - 2000 A−−

26Supercond. Quads

200 - 500 A−−−

4Supercond. Solenoids± 60 A−−

4~40

Supercond. Correction coils

440, 630 kW−2−−DR Main Bends

5 -2014/3/360 kW

23−

26− 2014DR Bends, Quads, Sexts
Magnet Review27

Installation of new mega-watt class power supplies

Mega-watt class power supplies are
installed with their power receiving
equipment.
Magnets being used as a test load fora running test.
2014/3/3

Magnet Review 201428

Overhaul of medium class power supplies (< 100 kW)

Most of the medium class power supplies
are being re-used in SuperKEKB. 339
power supplies has been overhauled.
Replacement of chemical capacitors, ACDC converters, circuit breakers and IGBTs
are performed. Ceramic capacitors areadded at the output terminal to reduce
switching noise.
Running test with dummy load is done atboth factory and KEK.
2014/3/3

Magnet Review 201429Overhaul of small class power supplies (< 0.8 kW)

Only 129 of new small class power supplies were/will be manufactured,
while 1,885 small class power supplies are re-used in SuperKEKB
Some of the re-used power supplies were overhauled. The number ofoverhauled power supplies was only 265, limited by budget.
Running test with dummy load, however, has been performed for all of re2014/3/3
Review30
usedsupplies. Fault was foundMagnetin 3%of2014
power supplies.

Circuit breakers replacement

279 of circuit breakers (420 V/210 V/100 V) at 8 power supply buildings
have
2014/3/3been replaced.
Magnet Review 201431

Cabling
Stored cables are carried …

…and installedfrom PS building
to KEKB tunnel.

Cabling for Nikko wigglers was heavy work: complicated, but little working
2014/3/3
Magnet Review 201432
space.

Schedule of magnets and power supplies
In the Tunnel• Sextupole magnets and steering
magnets installa;on in Tsukuba andabort sec;ons.
• Installa;on of near‐IR magnets• Cooling water pipes, power cables
installa;on and adjustment• Survey and FINAL alignment of themagnets in the tunnel

Field measurement and opera;on• More ﬁeld measurement for new66+α magnets in FY2013~EarlyFY2014• Prepare database of excita;onparameters .
‐‐ Address each magnet based onlawce‐‐ Grouping power supply “family”
2014/3/3

Power Supply• Manufacture 350+40 new power
supplies• Cabling
AC input : Feb. – March 2014
DC output : Sep. 2013 – May 2014
Interlock : Nov. 2013 – July 2014
Current monitor : May ‐ July 2014
Network: May ‐ July 2014
• Start‐up and tuning‐ Test opera;on : January 2014.
‐ Full‐scale start‐up and tuning :September 2014.

Magnet Review 201433

5. And more.

2014/3/3

Magnet Review 201434

Right side
Right sideIR mockup

ONLY 53mm
Installa;on may be tricky…
between transfer We made a mockup to study:
tube and magnet  How to install magnets, pipes such abusy area?
How to connect cooling water, power
supplies and other life lines for facility

Right side IR mockup@低真棟(building just across the street)

3D-CAD
Aoki2014/3/3

Magnet Review 201435