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CRYOREFRIGERATOR DEVELOPMENT FOR MAGNETIC RESONANCE IMAGING APPLICATIONS.

Author(s) : ACKERMANN R. A.

Summary

GIFFORD MCMAHON CYCLE (GM) REFRIGERATORS ARE USED ON ALL MAGNETIC RESONANT IMAGING (MRI) SUPERCONDUCTING MAGNETS TO REDUCE LIQUID HELIUM CONSUMPTION AND SIZE. THE GE RESEARCH AND DEVELOPMENT CENTER IS ENGAGED IN SEVERAL CRYOGENIC REFRIGERATOR PROGRAMS. THIS WORK CONSISTED OF ENDURANCE TESTING AND FAILURED MODES ANALYSES ON SEVERAL GM REFRIGERATORS AND OF THE STUDY OF NEW LOW TEMPERATURE, HIGH SPECIFIC HEAT, REGENERATOR MATERIALS FOR USE AT TEMPERATURES BELOW 10 K. ONE YEAR UNATTENDED OPERATION IS READILY ACHIEVABLE WITH A GM REFRIGERATOR AND IT IS HOPED TO ACHIEVE 2 TO 3 YEARS. REGENERATOR TESTING OF HIGH HEAT CAPACITY MATERIALS PROVED VERY SUCCESSFUL. HOWEVER, EROSION OF MATERIAL FROM THE REGENERATOR WAS AN ACUTE PROBLEM ENCOUNTERED.

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Pages: 222-226

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Details

  • Original title: CRYOREFRIGERATOR DEVELOPMENT FOR MAGNETIC RESONANCE IMAGING APPLICATIONS.
  • Record ID : 1992-2017
  • Languages: English
  • Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
  • Publication date: 1991/08/10
  • Document available for consultation in the library of the IIR headquarters only.

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