Breakdown characteristics of electrical discharges in high-density helium near the critical point

Hitoshi Muneoka, Keiichiro Urabe, Sven Stauss, Kazuo Terashima

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We present an investigation of the breakdown behavior of micrometer gap direct-current discharges in gaseous, supercritical, and liquid helium, which shows a critical anomaly of the breakdown voltage near the critical point. A discharge model that combines gas- and liquid-like breakdown mechanisms and takes into account the local fluid structure in a fluctuating fluid with the concept of a modified electron mean free path, allows us to reproduce the breakdown behavior. The result of the analysis suggests that the critical breakdown anomaly is caused by long acceleration paths inside low-density domains resulting from the density fluctuation.

Original languageEnglish
Article number086201
JournalApplied Physics Express
Volume6
Issue number8
DOIs
Publication statusPublished - 2013 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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