Spatially correlated breakdown events initiated by field electron emission in vacuum and high-pressure SF6
- 14 February 1986
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 19 (2) , 219-231
- https://doi.org/10.1088/0022-3727/19/2/010
Abstract
An optical imaging technique is described that compares the spatial distribution of vacuum field emission sites on a planar cathode at fields of 10-20 Mv m-1 in high-pressure (10 bar) sulphur hexafluoride. It has been established that a direct correlation exists between the two processes provided a delay of at least 18 h is introduced between the two experiments. This observation indicates that a high-pressure breakdown event is associated with the switch-on of an electron emission site when a large burst of charge is suddenly injected into the electrically stressed gas.Keywords
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