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MTA Cryogenics:Where We AreThe Work of Fermilab AD/CryoBarry Norris, Christine Darve
and a host of wonderfully talented Cryogenic Personnel
John Thompson, Mike Dinnon, John Juneau, Roger Milholland, Joe Brown
To name a few
MTA Cryogenics
MTA Solenoid Helium and Nitrogen• Dewar Fed System for Helium and Nitrogen• Two 500 liter helium dewars and 160 liter LN2
Future Closed Loop Refrigeration Plant• Use of Tevatron style compressors, refrigerator,
and controls packages• Elimates overhead of liquid helium costs and
personnel requirements• Support of Cryo for Solenoid and Hydrogen
Absorber Needs
Hurdles We’ve Jumped
• Long Safety Review Process for Cryogenics in MTA Hall– Developed engineering documentation and safety analysis as per
Fermilab ES& H section on cryogenic facilities– Creation of ODH 0 environment while maintaining positive pressure in the
Hall for cleanliness considerations– Using 2 speed fan hardwired to ODH system, monitor vent flow…failure of
ventilation system causes reclassification of facility to be an ODH classification
• Issues About Coil Forces on Quench– Safety panel wanted analysis of quench forces– Mike Green spoke at depth with panel and satisfied concerned
• Significant Flange Leak Sealed Enough to Operate– Possible o-ring damage…long-term fix necessary– Applied vacuum bag sealant radial to flange gap and applied pressure
with hose clamp
Hurdles We NEED To Jump
• Understand and implement fix for flange leaks
• We must automate the cool down procedure-Understand if we can fill the magnet while powered
-Add a throttling valve to the supply system to slow down the helium usage rate thereby making the best use of helium’s sensible heat and reducing costs
-Provide adequate instrumentation and reliability to get to 24/7 operations
- Implement automation of magnet cool down in PLC located at MTA
Future Refrigerator What’s Been Done So Far?
• Large Objects On SiteCompressors, satellite ht. exchanger, gas engine, helium gas tank, LN2 dewar
• Piping contract for helium high pressure low pressure completed in Fall of 2005
• Field Controls designed...beginning to be assembled and installed
Future Refrigerator – What Must Be Completed?
• Install Controls – 480 volt down to low level– Received 480 volt, 400 hp motor starters for compressors
• Construct and Install All Helium and Nitrogen Transfer Lines
– Establishes connection from refrigerator to MTA Hall
• Finish tie in of components to helium warm piping
• SAFETY REVIEW
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