MTA Cryogenics Where We Are - MICE

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15 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

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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