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DIRECT CURRENT ELECTRICAL BREAKDOWN OF SATURATED LIQUID HELIUM AT 0.1 MEGAPASCAL IN THE PRESENCE OF THERMALLY INDUCED BUBBLES.

Author(s) : HARA M., HONDA K., KANEKO T.

Type of article: Article

Summary

BREAKDOWN PHENOMENA INITIATED BY THERMALLY GENERATED BUBBLES IN LIQUID HELIUM ARE CONSIDERED TO BE OF IMPORTANCE FOR THE DESIGN OF ELECTRICAL INSULATION OF SUPERCONDUCTING DEVICES. THE BOILING PROCESSES ARE SIGNIFICANTLY AFFECTED BY THE APPLICATION OF AN ELECTROSTATIC FIELD AND THE BUBBLE SHAPE VARIES COMPLICATEDLY WITH THE MAGNITUDE OF ELECTRIC FIELD, HEATER POWER AND THE ARRANGEMENT OF ELECTRODE SYSTEM. THUS THE BREAKDOWN VOLTAGE OF LIQUID HELIUM IN A PARALLEL PLANE GAP DEPENDS ON THOSE EXPERIMENTAL CONDITIONS. IT IS ARGUED THAT THE BREAKDOWN STRENGTH OF SATURATED LIQUID HELIUM AT ATMOSPHERIC PRESSURE IN THE PRESENCE OF THERMAL BUBBLES BECOMES LOWER THAN THAT OF SATURATED HELIUM VAPOUR AT THE SAME PRESSURE.

Details

  • Original title: DIRECT CURRENT ELECTRICAL BREAKDOWN OF SATURATED LIQUID HELIUM AT 0.1 MEGAPASCAL IN THE PRESENCE OF THERMALLY INDUCED BUBBLES.
  • Record ID : 1988-1306
  • Languages: English
  • Source: Cryogenics - vol. 27 - n. 10
  • Publication date: 1987

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