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MICE collaboration meeting
RAL 28 October 2004
Absorber R & D Planby
Wing Lau – Oxford University
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
1 Cool down cooler and absorbers
No cryogen in absorber needed at this stage;Record temperature achieved at various thermometer locationsObserve time taken to reach the soak-up temperature
Time lag on each component reaching its min tempEstimate time taken to reach soak up temperature of the absorber aloneDetermine the level of heat leak in the system
Cryostat Vessel Safety systemThermometers as per Fig.1a
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd 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
step
Procedures What to do Why do we do it What is needed
1 Cool down cooler and absorbers
No cryogen in absorber needed at this stage;Record temperature achieved at various thermometer locationsObserve time taken to reach the soak-up temperature
Time lag on each component reaching its min tempEstimate time taken to reach soak up temperature of the absorber aloneDetermine the level of heat leak in the system
Cryostat Vessel Safety systemThermometers as per Fig.1a
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
1 Cool down cooler and absorbers
No cryogen in absorber needed at this stage;Record temperature achieved at various thermometer locationsObserve time taken to reach the soak-up temperature
Time lag on each component reaching its min tempEstimate time taken to reach soak up temperature of the absorber aloneDetermine the level of heat leak in the system
Cryostat Vessel Safety systemThermometers as per Fig.1a
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
1 Cool down cooler and absorbers
No cryogen in absorber needed at this stage;Record temperature achieved at various thermometer locationsObserve time taken to reach the soak-up temperature
Time lag on each component reaching its min tempEstimate time taken to reach soak up temperature of the absorber aloneDetermine the level of heat leak in the system
Cryostat Vessel Safety systemThermometers as per Fig.1a
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd 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
step
Procedures What to do Why do we do it What is needed
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Liquid Helium
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Liquid Helium
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Liquid Helium
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Liquid Helium
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Helium Gas (at start)
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent ValveHe Transfer Line
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Relief Valve
T2
T02nd Stage Cold Head
Condensation Plate
Absorber Vacuum Vessel
Liquid Tube (Copper)
Copper Strap
Liquid Hydrogen
Gas Tube (Copper)
Cryostat Neck 304 St St
1st Stage Cold Head
50 K Shield
304 St St H2 Fill Pipe
H2 Fill Valve
T4
T3
60 K Exhchanger
He Cool Down Pipe 304 St St
T5
LH2 Absorber
H2 Gas Vent
Small Cooler
H2 Vent Tube 304 St St
Ball Valve For He Transfer Line
T1
Seal for Transfer Tube
H
H
H
Heater
Heater
Heater
P
Liquid Fill Vent Valve
Thermal performance test on the Absorber – CryoCooler system R&D plan
step
Procedures What to do Why do we do it What is needed
1 Cool down cooler and absorbers
No cryogen in absorber needed at this stage;Record temperature achieved at various thermometer locationsObserve time taken to reach the soak-up temperature
Time lag on each component reaching its min tempEstimate time taken to reach soak up temperature of the absorber aloneDetermine the level of heat leak in the system
Cryostat Vessel (Fig 2) Safety systemThermometers as per Fig.1a
2 Switch on the heaters sequentially at the CryoCooler 1st & 2nd stages and at Absorber
Measure temperatures at various pointsHeater must have known heat input
To see how the system responses to heat input at various locations
Heaters as per Fig 1a
3 Fill 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
4 Boil He away and pump out helium to about 0.1 torr
Turn on Absorber heater to facilitate Prepare Absorber for H2 operation Vacuum pump
5 Introduce 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
6 Shut off H2 gas supply T will continue to drop until it reaches 15KControl system takes over to maintain the temperature at this level
Test automatic control system Control system in place
7 Switch on heater at Absorber, 1st and 2nd stage of Cooler
Measure temperature responses at various thermometer locations
Evaluate response of absorber
Cost and Schedule estimate