ATF2Power supply

Masayuki Kumadanirs

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ATF2Quad K1

Grad T/m Max NI/ coil

Max.Op.IAmps

DB/ B(ppm)

CaseII

Case I

QM16 0.3218 6.8910 6254.46 133.1 4819R RBQM15 0.4756 10.1845 6254.46 133.1 5075R RBQM14 -1.1000 -23.5554 -6254.46 -133.1 350R RBQM13 0.7649 16.3796 6254.46 133.1 7700R RBQM12 0.7445 15.9427 6254.46 133.1 632R RBQM11 0.0000 0.0000 6254.46 133.1 NAQD10 -0.3140 -6.7240 -685.79 -14.6 70P PCQD10A -0.3140 -6.7240 -685.79 -14.6 70P PCQF9 0.3741 8.0110 817.06 17.4 300R RAQF9A 0.3741 8.0110 817.06 17.4 300 R RAQD8 -0.5606 -12.0047 -1224.38 -26.1 320R RAQF7 0.6000 12.8484 1310.43 27.9 250000*R RAQD6 -0.5606 -12.0047 -1224.38 -26.1 320R RAQF5 0.3741 8.0110 817.06 17.4 300R RAQF5A 0.3741 8.0110 817.06 17.4 300R RAQD4 -0.3135 -6.7133 -684.70 -14.6 70P PCQD4A -0.3135 -6.7133 -684.70 -14.6 70P PCQD2B 0.5889 12.6107 1286.19 27.4 468R RAQF3 -0.2494 -5.3406 -544.70 -11.6 8822R RAQD2A -0.2744 -5.8760 -599.31 -12.8 2450R RAQF1 0.9140 Diff.design 43.1 65P PBQD0 -1.4940 Diff.design -70.6 20P PA

ATF2Power supply2

* to be confirmed

Case I

Group precise A

100A QD0 10ppm

Group precise B

50A QF1 30ppm

Group precise C

20A QD4,QD10

30ppm

Group rough A

30A The rest

poor

Group rough A

150 QM12-16 poor

CaseII

category

current

Magnet ID

dB/B

precise 80A QD0,QF1,QD4,QD10

10ppm

rough 150A All others

Don’t care

standardization

Standardization

Necessity of monitoring field gradient for QD0

Additional Q magnet

Harmonic coil

R and D

offline Yes. Improved harmonic coil

Yes(accuracy)

online Yes.Special vacuum chamber

Piezo driven tangential coil

Yes(accuracy and new challenge)

Maintenance and Failure recovery

Design/construction

maintenance

Failurerecovery

installation

SLAC* slac/vender

kek vender slac

KEK/nirs

nirs/vender

kek takano/td or idx

takano/td or idx

SLAC*/KEK

slac/nirs

kek vender vender

* slac: redundancy system

Need help.

Control(readout , setting, data logging, interlock)

Temperature stabilized room (local) of Precise Quad power supply and B power supply

Development of more precise magnet measurement(field gradient) as well as NMR

On the Cost reduction

Standard commercial Power supply could be used for 80% of magnet .

TakasagoManuf.DC power supplySetting/reading accuracy: 250 ppm

voltage current W*H*D mm Price inYenEX-375L2 60V 25A 94*130*405 152,000EX-750L2 60V 50A 189*130*405 242,000EX-1125L2 60V 75A 379*130*405 332,000EX-1500L2 60V 100A 379*130*405 418,000

G-IB, RS232C,/485 optional ( 50,000)

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Takasago power supply controled by laptop

precise Q 4 units

precise B 3 units

Precise power supplies are only 7 units out of 41 power supply units.

The cost of SLAC estimation of 41 power supplies are (231+440)k$=691 k$

Multiply 34/41x691=573 k$

Rough estimation: suppose cost of unit power supply of 50 A is

250,000 Yen=2.5 K$. and 34 unitsx2.5k$=85 k$.

The net saving is 691$-85k$=606 k$.

Crude estimation