Triggering a radial multichannel pseudospark switch using electrons emitted from material with high dielectric constant
作者:
K. Bergmann,
R. Lebert,
J. Kiefer,
W. Neff,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 14
页码: 1936-1938
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119986
出版商: AIP
数据来源: AIP
摘要:
The electron emission from a field emission trigger unit was matched to the requirements for the simultaneous ignition of all channels in a radial multichannel pseudospark switch for a large parameter range of the pseudospark discharge. In such trigger unit the electrons are extracted from the surface of a high-&egr; material by field emission after applying a pulsed voltage. Electron emission occurs in a pressure range from 1–50 Pa, where the pseudospark discharge is operated. The access to low working gas pressures (<10 Pa) using such trigger unit allows for achieving high hold-off voltages. The ignition of the pseudospark discharge was investigated by means of high speed photography and by a parallel observation of the electron beam of a single discharge channel, which occurs in hollow-cathode phase. ©1997 American Institute of Physics.
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