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