MTA Cryogenics: Where We Are The Work of Fermilab AD/Cryo Barry Norris, Christine Darve and a host of wonderfully talented Cryogenic Personnel John Thompson,

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Presentation transcript:

MTA Cryogenics: Where We Are The Work of Fermilab AD/Cryo Barry 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 Complex

Dewar Fed Cryogenics for MTA Solenoid

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

Present Configuration – A Dewar Fed System Total MTA solenoid volume about 300 liters

Six LHe Solenoid Fills Since Feb 28

Successful Automatic LN2 Refill

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

Refrigerator Flow Scheme Supporting Solenoid and Absorber

Future Refrigerator What’s Been Done So Far? Large Objects On Site Compressors, 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

Compressors – 400 Hp Screw Machines

Tevatron Satellite Ht Exchanger 500 Watt Capacity at 15K