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MICE Cryostat Status

MICE Cryostat Status. Prototype cryostat Status & Plans Parts Operating data (supplemental) Four final cryostats Status & Parts left to acquire Assembly area & pictures Schedule. Prototype Cryostat Status. Status: Cold, loaded with new cassette #112 in slot 2.

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MICE Cryostat Status

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  1. MICE Cryostat Status • Prototype cryostat • Status & Plans • Parts • Operating data (supplemental) • Four final cryostats • Status & Parts left to acquire • Assembly area & pictures • Schedule Russ Rucinski, FNAL, Oct. 8, 2006

  2. Prototype Cryostat Status Status: Cold, loaded with new cassette #112 in slot 2. Temperatures and heat loads up slightly from previous operation, but within operating margin (at 60 Hz) cryocooler power. The trouble may be with cassette #112 construction, but won’t be able to confirm until we warm up and can look at it. Plans: Staying cold until characterization of #112 is completed. Russ Rucinski, FNAL, Oct. 8, 2006

  3. Nomenclature/Parts – stripped down Invar Envelopes Upper Thermal Links Clamping bars Lower Thermal Links Cryocooler with upper and lower cooling stages Russ Rucinski, FNAL, Oct. 8, 2006

  4. Nomenclature/Parts Lid Upper Thermal Link Upper intercept Cryocooler G10 stiffener panels Lower intercept Lower Thermal Links (Copper radiation shield & MLI not installed) Russ Rucinski, FNAL, Oct. 8, 2006

  5. Prototype – Recent operating info. *Heat loads up a bit. Upper CryoCooler temperature 49 K versus 47 K Lower CryoCooler temperature 5.9 K versus 5.3 K From load map; 58 W & 4.5 W versus 55 W & 4.0 W *Heat flow across the links up. Q= (K*A/L) ΔT Upper link ΔT = 8.5 K versus 7 K Lower link ΔT = 0.21 K versus 0.13 K *Cassette Temperatures up. (9.0 K req) 105: 7.8 K versus 7.5 K #112: 8.2 K versus #111: 7.1 K ΔT Russ Rucinski, FNAL, Oct. 8, 2006

  6. Prototype – Recent operating info. *Cassette 112 upper bulkhead 3 F colder – implies higher heat load down the upper part of cassette. I suspect foam is missing from upper. I think foam in lower is there. #105: 72 F #112: 69 F Lid temp = 70 F Russ Rucinski, FNAL, Oct. 8, 2006

  7. Four final Cryostats: Status All parts here except: Invar envelopes: Promised by Oct. 20th Cryo-Coolers: Have 2. Other 2 still at RAL, H2 R&D Cassettes: Have four. #105, #111, #112 & #107 (just negotiated). Eventually need eight. BackPlane structure: Need to re-order base plate, misc. parts Russ Rucinski, FNAL, Oct. 8, 2006

  8. Four final Cryostats:Assembly Area “Area 51”: D-Zero Experiment Highbay Fermilab Russ Rucinski, FNAL, Oct. 8, 2006

  9. Four final Cryostats:Assembly Areas “Solder station”: Thermal link work Russ Rucinski, FNAL, Oct. 8, 2006

  10. Four final Cryostats:Assembly Area Work done/being done: G-10 stiffener panels MLI taped. Working on lid plumbing Tinning OFHC flexible strips for thermal links Next: lid heaters, cryocooler mounting, instrumentation feed thru’s, Thermal link assembly Russ Rucinski, FNAL, Oct. 8, 2006

  11. Four final Cryostats:Draft Schedule? October 2006– Thermal link assembly, lid work, delivery of invar envelopes. November/December 2006 - First production cryostat completed, use Cassette 111 & 107. Cool down, evaluate. Warm up. January 2007 – Second production cryostat done. Load with 105 & 112? Cool down, evaluate. February - April 2007 – Third and Fourth cryostats done, tested. Note: Cassettes cannot be pulled/changed without unbolting lid, undoing MLI and loosening the clamping bars at the intercepts. So cryostats really aren’t final until loaded with final cassettes and tested. Russ Rucinski, FNAL, Oct. 8, 2006

  12. Closing Remarks Prototype: Successfully commissioned. Minimal risk of not being able to obtain operating temperature control. Use for station 5, UK or KEK – Nov/Dec.06* Four Final Cryostats: Will be ready ahead of schedule. November, 2007 – 4 cryostats, 8 cassettes (4 more need to be liberated from D-Zero with negotiation).* *revision based on input at CM16 Russ Rucinski, FNAL, Oct. 8, 2006

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