MICE collaboration meeting RAL 28 October 2004 Absorber R & D Plan by Wing Lau – Oxford University

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 1Cool down cooler and absorbers No cryogen in absorber needed at this stage; Record temperature achieved at various thermometer locations Observe time taken to reach the soak-up temperature Time lag on each component reaching its min temp Estimate time taken to reach soak up temperature of the absorber alone Determine the level of heat leak in the system Cryostat Vessel Safety system Thermometer s as per Fig.1a 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 1Cool down cooler and absorbers No cryogen in absorber needed at this stage; Record temperature achieved at various thermometer locations Observe time taken to reach the soak-up temperature Time lag on each component reaching its min temp Estimate time taken to reach soak up temperature of the absorber alone Determine the level of heat leak in the system Cryostat Vessel Safety system Thermometer s as per Fig.1a 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 1Cool down cooler and absorbers No cryogen in absorber needed at this stage; Record temperature achieved at various thermometer locations Observe time taken to reach the soak-up temperature Time lag on each component reaching its min temp Estimate time taken to reach soak up temperature of the absorber alone Determine the level of heat leak in the system Cryostat Vessel Safety system Thermometer s as per Fig.1a 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 1Cool down cooler and absorbers No cryogen in absorber needed at this stage; Record temperature achieved at various thermometer locations Observe time taken to reach the soak-up temperature Time lag on each component reaching its min temp Estimate time taken to reach soak up temperature of the absorber alone Determine the level of heat leak in the system Cryostat Vessel Safety system Thermometer s as per Fig.1a 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber Liquid Helium

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber Liquid Helium

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber Liquid Helium

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber Liquid Helium

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Thermal performance test on the Absorber – CryoCooler system R&D plan ste p ProceduresWhat to doWhy do we do itWhat is needed 1Cool down cooler and absorbers No cryogen in absorber needed at this stage; Record temperature achieved at various thermometer locations Observe time taken to reach the soak-up temperature Time lag on each component reaching its min temp Estimate time taken to reach soak up temperature of the absorber alone Determine the level of heat leak in the system Cryostat Vessel (Fig 2) Safety system Thermometer s as per Fig.1a 2Switch on the heaters sequentially at the CryoCooler 1 st & 2 nd stages and at Absorber Measure temperatures at various points Heater must have known heat input To see how the system responses to heat input at various locations Heaters as per Fig 1a 3Fill Absorber with Liquid Helium Measure T at absorber; if T < 4.8K, then OK; If T > 4.8K, then measure boil-off Evaluate how the absorber performs with Liquid Helium in it Flow meter at hydrogen vent exit Fig 1b 4Boil He away and pump out helium to about 0.1 torr Turn on Absorber heater to facilitatePrepare Absorber for H2 operationVacuum pump 5Introduce gas H2 and liquefy gas in absorber. Measure time taken to fill absorber with liquid hydrogen To measure performance of absorber when H2 has been liquefied Safety valve activated 6Shut off H2 gas supplyT will continue to drop until it reaches 15K Control system takes over to maintain the temperature at this level Test automatic control systemControl system in place 7Switch on heater at Absorber, 1 st and 2 nd stage of Cooler Measure temperature responses at various thermometer locations Evaluate response of absorber

Cost and Schedule estimate