Multi‐beam‐bulk model for electron transport during commutation in an optically triggered pseudospark thyratron
作者:
Hoyoung Pak,
Mark J. Kushner,
期刊:
Applied Physics Letters
(AIP Available online 1990)
卷期:
Volume 57,
issue 16
页码: 1619-1621
ISSN:0003-6951
年代: 1990
DOI:10.1063/1.104066
出版商: AIP
数据来源: AIP
摘要:
The electron energy distribution in low‐pressure pulsed power plasma switches is typically not in equilibrium with the local electric field. To simulate electron transport under these conditions a computer model has been developed and has been applied to the optically triggered pseudospark, or back‐lit‐thyratron (BLT). The model uses many groups of electrons divided into the ‘‘bulk’’ and the ‘‘beam’’. The bulk is represented by a fluid while the beam electrons are ballistic in nature and have not undergone significant energy‐loss collisions after generation. To account for beam electrons being generated at arbitrary locations in the BLT, multiple beams are employed in the model. The commutation phase of switching in the BLT is investigated and the onset of a hollow cathode effect during switching is predicted.
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