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Over recovery in low pressure sparkgaps - confirmation of pressure reduction in over recovery

Nagesh, KV and Ron, PH and Nagabhushana, GR and Nema, RS (1999) Over recovery in low pressure sparkgaps - confirmation of pressure reduction in over recovery. In: IEEE Transactions on Plasma Science, 27 (6). pp. 1559-1565.


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The over recovery in sparkgaps [1], [2] operating along the left-hand side of Paschens characteristics is due to pressure reduction in the gap after the first pulse discharge. This pressure reduction leading to over recovery in low pressure sparkgaps has been verified using a low pressure sparkgap with two sparkgaps placed one above the other in the same chamber. The breakdown voltage strength characteristics of the second gap has been determined for gap spacings of 3.5 mm to 10 mm, diffusion of plasma in the direction of vacuum pumping and opposite, at a pressure of 2.1 Pa for hydrogen gas. The vacuum pumping direction has a great influence on the breakdown strength characteristics of second gap after the first gap discharge. The breakdown voltage of the second gap can exceed its self breakdown voltage only 1) when the diffusion of plasma and vacuum pumping direction are same and 2) when the second gap spacing is greater than or equal to first gap spacing. Shorter gaps can always have breakdown voltage lower than or equal to their self breakdown voltage. The experimental setups, behavior of self breakdown voltages of second gap due to breakdown in the first gap, over recovery characteristics of sparkgaps, the results, and discussions are presented here.

Item Type: Journal Article
Publication: IEEE Transactions on Plasma Science
Publisher: Ieee
Additional Information: ©1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Gas sparkgaps;low pressure discharges;low pressure sparkgaps;over recovery;pressure reduction in overrecovery;recovery times;sparkgap recovery;sparkgaps
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited: 19 May 2005
Last Modified: 19 Sep 2010 04:18
URI: http://eprints.iisc.ac.in/id/eprint/2915

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