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Influence of transverse magnetic field on breakdown characteristics of vacuum, gaseous helium at low temperature and liquid helium

✍ Scribed by M. Hara; H. Shigematsu; S. Yano; K. Yamafuji; M. Takeo; K. Funaki

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 833 KB
Volume: 29
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(89)90278-6

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✦ Synopsis

The dielectric strength of coaxial cylindrical gaps in vacuum, gaseous helium at low temperature or liquid helium has been investigated under d.c. stresses in the presence of transverse magnetic field. Experimental results show that the dielectric strength in vacuum is lowered drastically by the application of transverse magnetic field. Therefore, a high voltage test under full load current is recommended to ensure the safe drive of superconducting devices with vacuum electrical insulation. A method for improvement of vacuum insulation performance is proposed on the basis of discussion on breakdown mechanism.

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