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Cooling Channel Summary Michael S. Zisman Center for Beam Physics Accelerator & Fusion Research Division Lawrence Berkeley National Laboratory MICE Collaboration.

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Presentation on theme: "Cooling Channel Summary Michael S. Zisman Center for Beam Physics Accelerator & Fusion Research Division Lawrence Berkeley National Laboratory MICE Collaboration."— Presentation transcript:

1 Cooling Channel Summary Michael S. Zisman Center for Beam Physics Accelerator & Fusion Research Division Lawrence Berkeley National Laboratory MICE Collaboration Meeting-Harbin January 16, 2009

2 Cooling Channel Summary: Zisman2 Introduction Cooling channel comprises (we hope!) —three FC modules, each with LH 2 absorber —two RFCC modules, each with one coupling coil and 4 RF cavities

3 January 16, 2009Cooling Channel Summary: Zisman3 The Main Players Focus coil module —Oxford + RAL o Wing Lau, Tom Bradshaw Absorbers —KEK + U.-Miss (LH 2 ) o Shigeru Ishimoto, Don Summers —Fermilab (LiH) o Alan Bross RFCC module —LBNL + HIT o Derun Li, Steve Virostek, Allan DeMello, Li Wang, FengYu Xu Along with a lot of RAL infrastructure support —especially the hydrogen delivery system o Mike Courthold, Matt Hills, Tom Bradshaw

4 January 16, 2009Cooling Channel Summary: Zisman4 Focus Coil Module Status (1) Contract let with Tesla Engineering —suggested design modification made at PRR o pipe cooling instead of bath cooling –avoids pressure vessel stress issues –requires Al bobbin; stainless steel unacceptable o expected to result in an overall better design Anticipated delivery date is now early 2010 for first item Main issue —STFC has committed only to Step 5 (two FC modules) o we need a third FC module to reach Step 6 —this has impact on RFCC fabrication approach as well

5 January 16, 2009Cooling Channel Summary: Zisman5 Focus Coil Module Status (2) Design update —bobbin enlarged to increase strength —vacuum vessel design strength calculation completed —cold mass support material (“S-glass”) strength measured o somewhat lower than originally assumed; accommodate in updated design —quench protection will be active o passive system found unacceptable –need to understand this; other magnets concluded differently —thermal design updated for indirect cooling; 0.3° margin (okay!) o still an issue if power supply operated at full current –need to prevent this by engineering —preparing list of instrumentation cables —developing splice procedure for testing —project plan updated (shows 39 day delay, but not optimized yet)

6 January 16, 2009Cooling Channel Summary: Zisman6 Focus Coil Module Status (3) FC module design (from Tesla)

7 January 16, 2009Cooling Channel Summary: Zisman7 Absorber Status (1) Design complete and fabrication under way in Japan —three absorbers being built o this is a commitment to Step 6! Al windows being fabricated at U.-Miss —they built the windows tested previously...and successfully! —initial batch will be used for destruction testing to validate design strength o plan is not to destruction test any of the windows used in MICE –shifters should be prepared to honor this plan! H 2 R&D system built at vendor, under RAL supervision —work lagged badly but effort now under way to reinvigorate it —the test system will become System 1 for MICE LiH disks (from ORNL) will be provided by Fermilab —safety issues minor but need to be addressed

8 January 16, 2009Cooling Channel Summary: Zisman8 Absorber Status (2) Detailed design of absorber

9 January 16, 2009Cooling Channel Summary: Zisman9 Absorber Status (3) Absorber schedule —first one at RAL in August o can this be tested at RAL?

10 January 16, 2009Cooling Channel Summary: Zisman10 Absorber Status (4) First new absorber window at U.-Mississippi (sacrificial) —will be sent to LBNL for measurement

11 January 16, 2009Cooling Channel Summary: Zisman11 RFCC Module Status (1) Design for coupling coil essentially complete at ICST —review in December uncovered no significant technical issues —large test coil fabrication now complete o testing will start in March –permission to commence with winding of first “real” magnet (for MuCool R&D program) will be based on large coil test results Large Test Coil Large Test Coil Vacuum Vessel

12 January 16, 2009Cooling Channel Summary: Zisman12 RFCC Module Status (2) Cavity design complete (DeMello, Virostek) —RFP sent out on January 12, 2009 o expect responses by end of January o requesting 9 month fabrication schedule —then, evaluate bids to select the best o several variants –buy all 10 at once –buy 5 with option for additional 5 o in principle, choice hinges on UK actions on Step 6 –dilemma: likely must decide before we get UK commitment Issues: —LN temperature operation still poses challenges (and risks) —need to make sure the RF power is available when needed for testing —safety aspects of this system need to be evaluated

13 January 16, 2009Cooling Channel Summary: Zisman13 RFCC Module Status (3) RFCC design —plan for test assembly at LBNL and then removing cavities for shipping SC coupling Coil Cavity Couplers Vacuum Pump 201-MHz cavity Curved Be window

14 January 16, 2009Cooling Channel Summary: Zisman14 RFCC Module Status (4) A number of potential bidders pre-qualified for bid list e-beam welder at Meyer Tool e-beam welder at Roark Welding & Engineering e-beam welder at Applied Fusion

15 January 16, 2009Cooling Channel Summary: Zisman15 Final Remarks Good progress is being made on the cooling channel components —thanks to the help of a skilled and dedicated engineering staff When the RF cavity contract is let, all major cooling channel components will be in production Still needed —update all WBS schedules —develop more reliable cost-to-complete estimates —operating procedures and safety manuals o cannot leave MICE unattended when magnets are on –what about off, but cold?

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