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A THREE-STAGE REFRIGERATOR FOR TEMPERATURES DOWN TO 4.2 K.

Author(s) : MULLER D.

Type of article: Article

Summary

THE CRYOREFRIGERATOR CONSISTS OF A TWO-STAGE GIFFORD-MCMAHON REFRIGERATOR AND A JOULE-THOMSON STAGE. IT USES HIGH-PRESSURE HELIUM AS REFRIGERANT IN A CLOSED CYCLE. THEREFORE, IN THE NORMAL REFRIGERATION MODE A REFILLING OF HELIUM IS NOT NECESSARY. THE LOWEST AVAILABLE TEMPERATURE IS 4.0 K. AT 4.5 K THE REFRIGERATION CAPACITY IS MORE THAN 2 W. IN LIQUEFACTION MODE THE REFRIGERATOR IS ABLE TO LIQUEFY 0.5 L/H OF HELIUM. IT DOES NOT USE ANY LIQUID AGENTS (LIKE LIQUID NITROGEN) FOR COOLING DOWN. IT IS EASY TO HANDLE AND TO SERVICE, IS RELIABLE AND USEFUL FOR LONG-TIME TEST IN THE TEMPERATURE REGION OF THE LIQUID HELIUM.

Details

  • Original title: A THREE-STAGE REFRIGERATOR FOR TEMPERATURES DOWN TO 4.2 K.
  • Record ID : 1985-0393
  • Languages: English
  • Source: Vide Couches minces - suppl. n. 221
  • Publication date: 1984/03
  • Document available for consultation in the library of the IIR headquarters only.

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