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HEAT SWITCH FOR LIQUID HELIUM TEMPERATURES.

Author(s) : TORRE J. P., CHANIN G.

Type of article: Article

Summary

IN THE < ON > POSITION, THE SWITCH RELIES ON THE THERMAL PROPERTIES OF LIQUID HELIUM, ACHIEVING A THERMAL CONDUCTANCE COMPARABLE TO THAT OF THE ELECTROLYTIC COPPER OF WHICH THE CONDUCTION CELL IS CONSTRUCTED. THE SWITCHING ACTION IS ACHIEVED WITHOUT MOVING PARTS: IT IS SWITCHED < OFF > BY REMOVING THE HELIUM FROM THE CONDUCTION CELL AND < ON > BY HEATING THE CRYOPUMP TO A TEMPERATURE AT WHICH THE GAS IS DESORBED, ELIMINATING THE NEED FOR CONNECTING TUBING, EXTERNAL PUMPS, AND GAS HANDLING ACCESSORIES. THE RATIO OF < ON > TO < OFF > CONDUCTANCE IS GREATER THAN 10,000 WITH SWITCHING TIMES OF SEVERAL MINUTES OR LESS.

Details

  • Original title: HEAT SWITCH FOR LIQUID HELIUM TEMPERATURES.
  • Record ID : 1985-0020
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 55 - n. 2
  • Publication date: 1984
  • Document available for consultation in the library of the IIR headquarters only.

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