Statistical characteristics of electrical breakdown in saturated superfluid helium

Junya Suehiro, K. Ohno, T. Takahashi, M. Miyama, M. Hara

Research output: Contribution to conferencePaper

6 Citations (Scopus)

Abstract

Superfluid liquid helium (HeII) with a lower temperature than 2 K is an attractive coolant for large high field superconducting magnets because it has far better heat transfer properties and increases critical current of superconductor. This paper deals with electrical breakdown characteristics of saturated HeII at 1.85 K and the statistical analysis based on the Weibull distribution function and the Weak-link theory. A special attention is paid to the size effects on the breakdown characteristics. Comparing the obtained results with those of normal liquid helium (HeI), it is shown that the dc breakdown strength of HeII is much more sensitive to the electrode area than HeI. Consideration on the breakdown time lag under a pulsed stress reveals that the breakdown triggering electron is produced by field emission from the cathode surface as in the case of HeI.

Original languageEnglish
Pages320-323
Number of pages4
Publication statusPublished - Dec 1 1996
EventProceedings of the 1996 IEEE 12th International Conference on Conduction & Breakdown in Dielectric Liquids, ICDL'96 - Roma, Italy
Duration: Jul 15 1996Jul 19 1996

Other

OtherProceedings of the 1996 IEEE 12th International Conference on Conduction & Breakdown in Dielectric Liquids, ICDL'96
CityRoma, Italy
Period7/15/967/19/96

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

Suehiro, J., Ohno, K., Takahashi, T., Miyama, M., & Hara, M. (1996). Statistical characteristics of electrical breakdown in saturated superfluid helium. 320-323. Paper presented at Proceedings of the 1996 IEEE 12th International Conference on Conduction & Breakdown in Dielectric Liquids, ICDL'96, Roma, Italy, .