Test Lab Cryogenic Requirements

Kirk Davis

Director’s Review of Cryogenic Capacity

26 May, 2010

Test Lab Cryogenic Loads

• Cryomodule Test Facility (CMTF): Cryomodule cooldown, static, and RF heat loads. 4 to 6 week test cycle

• Vertical Test Area (VTA): SRF cavity testing, materials testing, component testing. 2 to 3 day test cycle

• Hall D Solenoid Testing

• Test Lab Service Supply LN2, N2, and He

12GeV Cryomodule Production Load Scheduling

1. The CTF can meet any foreseeable VTA load without a cryomodule in the CMTF.

2. The VTA runs at half-capacity on the day of a CMTF cryomodule cooldown.

3. The VTA is shut down the day of a CMTF cryomodule fill and two subsequent days are required for full CTF recovery (usually scheduled over a weekend).

4. With a cold cryomodule in the CMTF, the available CTF supply to the VTA will be 3/4 of scheduled demand.

5. To meet scheduled demand and improve efficiency, Cryo has proposed that a 10,000 L LHe dewar integrated with a properly designed sub-cooler be installed in place of the existing 3,800 L LHe Dewar.

12GeV Cryomodule Production Loads

Planned Average Busy Week in the VTA Jul 2010 - Dec 2011(Average of the busiest 3/4 of weeks)

Program Type of Test Dewar # Tests/wk 4K He/test 4K LHe/Wk

7-cell qualification 8 2 1200 2400

7-cell retest 4 1 900 900

9-cell 7 2 1200 2400

Single cell - EP 4 0.5 900 450

Misc. Instrum & materials 1 or 2 3 200 600

Single cell - matl 6 5 210 1050

WFO misc. 4 0.25 900 225FRIB (2011) 5 0.25 1800 450

Total 8475

Existing 3800 L dewar draw per wk @ 40% transfer loss 14125 L

Existing CTF weekly capacity 23520 L

CMTF Load Jan 2011 - Spring 201212 GeV/R100 8-cavity Cryomodule test CMTF 2.5 g/s sustained static load 75 L/hr

4 g/s during CM cooldown 120 L/hr

(eleven CM)*(5 wks/CM) 4 weeks cold, 1 week warm per test cycle

Existing CTF sustained capacity 140 L/hr

CMTF/VTA Overlap Period Load Jan 2011 - Dec 201112 GeV/R100 8-cavity Cryomodule test CMTF 2.5 g/s primarily static load 12600 L

VTA testing primarily dewar fills 14125 L

TOTAL 26725 L

12GeV

ILC

Hall D Solenoid Testing

1. Physics is scheduled to test a superconducting solenoid beginning around July, 2010. A total of four tests are planned, each lasting approximately 3 weeks with 2-3 months between tests.

2. Static, dynamic, and cooldown loads are expected to resemble those of a cryomodule in the CMTF.\

3. The LHe required for this testing will be supplied from CTF coldbox #3, dedicated to this load. Coldbox #2 will continue to supply VTA and CMTF as usual.

N2 Loads

1. Existing Test Lab 3000 gal dewar supplies warm gas and LN2 to the test lab.

2. Warm gas is used for test lab service distribution and EEL building.

3. LN2 is used for automated cryo-cycling or cold-shocking of production parts and for filling portable dewars.

4. LN2 is proposed for pre-cooling Hall D solenoid. Estimated load of 20 g/s for cooldown, 7 g/s static; CTF will supply this LN2.

5. Existing supply dewar must be refilled at least once per week to meet demands. Maintaining tanker truck access is important.

On The Horizon

• JLAMP, if funded, will look like an extension of the 12GeV production run

• ILC R&D should continue for the foreseeable future

• FRIB cavity production

– Proposed cavity production scale larger than 12GeV

– Quarter-wave structures may exceed the size capacity of all VTA dewars except D5

– Some cryomodules may exceed the height capacity of the CMTF

• Project X

– Spoke cavities and ILC type elliptical cavities

• Injector Test Cave upgrade