偏極標的開発＠KEK偏極標的開発＠KEK

Shigeru IshimotoShigeru IshimotoKEK

偏極標的開発キックオフミーティング

2010年 6月30日-7月1日2010年 6月30日 7月1日山形大学

Cooling Power of 4He Cryostat

Cooling Power of 4He Cryostat

Cooling Power of 4He Cryostat

Merit of 4He 5T systemSuperfluid; better H.Ex.no 3He (neutron, cost) simple; pump/circulator

Demerit140Gh MW 213 MH NMR140Ghz MW, 213 MHz NMR5T; cost, beam bend

4He cryostat cooling power0.9W @1K, 6,000m3/hr

LHe～1.3 L/hr

Michigan PPT System

Michigan PPT SystemPol.(5T/1K) > Pol(2.5T/0.5K) ?

D.G. Crabb et al., Phys. Rev. Lett. 64, 2627 (1990)

Michigan PPT SystemM ch gan y t m

Michigan PPT to KEKg

KEK/J-PARC; (1) Neutron programbio-material researchbio material researchproton filter for pol-n beam

(2) Hadron program(2) Hadron program(3) Target material R&D

Proton Filterr t n F t r

Transfer the Michigan PPT System to J-PARC

R.S.Raymond

A.D. Krisch(UM)

y(UM;left)

H.M.Shimizu( E h )

K. Imai(Kyoto)

D.G. Crabb(Virginia)

(KEK;right)

KEK(Virginia)

K. Yonehara(UMFermi)

A.D. Krisch

Michigan PPT System

Michigan PPT System

Roots Pumps 3 000 m3/h x 2 set3,000 m /h x 2 set

Michigan PPT System (5T SC Mag.)

BEAMOpen Angle

SC Mag. PS

Michigan PPT System (EIO)

EIO(140GHz) and W-P.S.

Michigan PPT System (NMR & NH3)

NMR (213MHz)NMR (213MHz)

NH3 Irradiation cryostat (L Ar)cryostat (L-Ar)

Michigan PPT System (Target Holder)

Target holderD=20 L=32

Thin target holderD=20, L=32 holder

Teflon sample f NMR TE for NMR TE

test

Michigan PPT System Arrived at East Counter Hall/KEK, Nov-2007

PT Test Area at Tsukuba

East CHEast CH

North counter hall K5 area

Cold neutron exp. Hall

PT Test Areaat Tsukuba

Cold neutron exp. Hall

PT Test Area at TsukubaCold neutron exp. Hall

PT Test Area at TsukubaCold neutron exp. Hall

PT Test Area at TsukubaCold neutron exp. Hall

PT Test Area at KEK-K5(Pl nnin )(Planning)

North counter hall K5 area

Plan of 4He PumpPlan of He Pump

7,000 m3/hr

Pumping Speed of 4He &AirPumping Speed

EH4200+E2M275(50Hz) -Air EH4200+E2M275(50Hz) -He

2500

3000

( ) ( )

2000

2500

m³/

hr)

1500

ping

Spe

ed (

500

1000

Pum

p

0

10-5 10-4 10-3 10-2 10-1 100 101 10210 10 10 10 10 10 10 10Pipe End Pressure (mbar)

By BOC Edwards

Summary and Plan1) Set up at KEK north counter hall K52) Preparation2) Preparation

* Insulation vac. T.M.P. + R.P.* 1K pipe + support structure* Vacuum gauges (pirani + C C ) Vacuum gauges (pirani + C.C.)* Thermometer* DAQ (PC + datalogger)

3) T t f 1K t t d 5T t3) Test of 1K cryostat and 5T magnet---- F.Y. 2010

4) Preparation 213 MHz + PC-NMR5) Test of 213 MHz NMR (Tefron T.E. signal)6) Test of 105 MHz NMR + 70GHz MW

---- F.Y. 2011?7) Sample test (PE, NH3, …)

---- F.Y. 2012?---------------------------------------------------------------------) 140 GHz EIO + P.S. > Varian ; J-PARC/MLF(Shimizu) ?