Breakdown characteristics of cryogenic gaseous helium in uniform electric field and space charge modified non-uniform field

M. Hara, J. Suehiro, H. Matsumoto

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

D.c. breakdown characteristics of gaseous helium in uniform and non-uniform electric fields down to 4.2 K at atmospheric pressure have been investigated. Although helium is a nonelectronegative gas, a negative pulse corona is observed only near the normal boiling point due to the abrupt appearance of quasi-bubble state electrons. Positive ion space charge modifies the electric field distribution in the gap space considerably. The electric field strength on the non-corona electrode in the ion flow field is measured satisfactorily and analysed theoretically using a numerical electric field calculation technique. On the basis of experimental results, methods are proposed to give corona onset criteria and the breakdown voltage preceded by a positive glow corona.

Original languageEnglish
Pages (from-to)787-794
Number of pages8
JournalCryogenics
Volume30
Issue number9
DOIs
Publication statusPublished - Sep 1990

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

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