✦ LIBER ✦

Influence of electric field at cathode triple junction on flashover characteristics in vacuum

✍ Scribed by Osamu Yamamoto; Tadasu Takuma

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 175 KB
Volume: 131
Category: Article
ISSN: 0424-7760
DOI: 10.1002/(sici)1520-6416(200003)131:3<1::aid-eej1>3.0.co;2-c

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✦ Synopsis

Analytical and experimental investigations have been carried out to clarify the characteristic and the mechanism of surface flashover in vacuum. Various insulator profiles made of PMMA having a certain contact angle with the cathode have been investigated. Simulation of surface charging based on a secondary electron emission process is performed, which analyzes the electric field strength near the cathode triple junction considering the surface charge. It has been shown that the flashover voltage of spacers experimentally obtained significantly depends on the electric field strength near the triple junction at the cathode.

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