David Kashy Hall B Lead Engineer May 26 2010 CLAS Cryogenic Components Transfer line from ESR 6 coil torroidal field magnet with s ervice module built by Oxford Instruments operating ID: 705829
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Hall B CryogenicsCLAS and CLAS12
David Kashy
Hall B Lead Engineer
May 26, 2010Slide2
CLAS
Cryogenic Components
Transfer line from ESR
6 coil torroidal field magnet with service module –built by Oxford Instruments operating since 1995500 liter liquid helium dewar – standard product with 2 liquid withdrawal bayonets and cold gas returnLiquid helium cooled cryo-target - capable of liquefying hydrogen, deuterium, He4 and He3Frost Target and 5 Tesla Polarizing Magnet5T Polarized Target – cooled with LHe4.7T Solenoid – cooled with LHe HDIce – In development also cooled with LHe Slide3
CLAS Cryogenic Hardware
CLAS OXFORD Torus
Frost Polarizing Solenoid
Cryofab
500
l
Buffer Dewar
4.7
T DVCS Solenoid
Photon Target Cell 40 x 4cm
Microwave Polarized Target
Electron Target Cell 2.5 x 1cm
30mK FROST TargetSlide4
Scheduled Experiments 2010-2012
Frost:
Torus, Buffer Dewar, Frost Target and Polarizing Magnet
HDIce/HD DVCS: Torus, Buffer Dewar and In-Beam-CryostatPrimex: No cryogenics, but keep Torus coldTwo Photon Exchange: Torus, Buffer Dewar and Standard CryotargetSlide5
CLAS Loads
Torus: 110 Watts and 0.6 g/s lead cooling
Transfer Lines and Buffer Dewar: 30 Watts
Targets and Solenoids – All are of same order of magnitude ≤ 1g/s (liquefaction loads)LN2 – 7 g/s including TLSlide6
CLAS 12
Cryogenic Components
Transfer line from ESR
500 liter liquid helium dewar – standard product with 2 liquid withdrawal bayonets and cold gas returnLiquid helium cooled cryo-target - capable of liquefying hydrogen, deuterium, He4 and He3New 6 coil torroidal field magnet with service module New 5 Tesla Solenoid MagnetNew Distribution Can for both magnets and connection of Buffer DewarNew Polarized TargetHDIce – In development also cooled with LHe Slide7
CLAS 12 New hardware
Torus – WANG NMR
Solenoid – WANG NMR
Distribution BoxSlide8
CLAS12 Loads
Torus:
100
Watts and 0.6 g/s lead cooling (per specification note: Vendor claims less)Solenoid 70 Watts and 0.6 g/s lead cooling (per specification note: Vendor claims less)Transfer Lines, Distribution Box and Buffer Dewar: 60 WattsTargets– All are of same order of magnitude ≤ 1g/s (liquefaction loads)LN2 – ~10 g/s including TLSlide9
CLAS12 Load Summary
Refrigeration load 230W
Liquefaction load 2.2 g/s
LN2 10g/sLHe Inventory 1150 literLN2 Inventory 200 literStart up date April 2013Duration 10+ yearsSlide10
Questions?