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Proceedings Paper

Vacuum-breakdown properties of oxygen-free copper electrodes machined by diamond turning for mirror finish
Author(s): Shinichi Kobayashi; Yasuyuki Hashimoto; Yoshio Saito; Yasuchika Nagai; Yoshiki Yamamoto; Kiyomatsu Takeuchi; Takeshi Sugano
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Paper Abstract

The electrodes used in this investigation to experimentally evaluate the effect of diamond turning on electrical breakdown characteristics in vacuum were first roughly machined by turning, and then machined to a mirror finish by diamond turning. Residual stresses of the electrode surfaces were measured by an X-ray diffraction method before and after the diamond turning. Several electrodes were annealed in vacuum for one hour at 400 degree(s)C or 700 degree(s)C before the diamond turning. Vacuum breakdown experiments using impulse voltages with the wave form of 64/700 microsecond(s) revealed that the diamond turning improves breakdown strength, that the conditioning of vacuum gaps is achieved by only few tens of breakdowns, and that annealed electrodes have a better hold-off voltage capability.

Paper Details

Date Published: 1 May 1994
PDF: 4 pages
Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); doi: 10.1117/12.174665
Show Author Affiliations
Shinichi Kobayashi, Saitama Univ. (Japan)
Yasuyuki Hashimoto, Saitama Univ. (Japan)
Yoshio Saito, National Lab. for High Energy Physics (Japan)
Yasuchika Nagai, Hitachi Cable, Ltd. (Japan)
Yoshiki Yamamoto, Hitachi Cable, Ltd. (Japan)
Kiyomatsu Takeuchi, Mechanical Engineering Lab. (Japan)
Takeshi Sugano, Mechanical Engineering Lab. (Japan)

Published in SPIE Proceedings Vol. 2259:
XVI International Symposium on Discharges and Electrical Insulation in Vacuum
Gennady A. Mesyats, Editor(s)

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