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Proceedings Paper

Influence of prebreakdown currents on the electric strength of vacuum gaps at large electrode areas
Author(s): Nikolai N. Koval; Yuri D. Korolev; P. M. Shchanin
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Paper Abstract

Electrode systems with electrode areas exceeding a few square meters and interelectrode gap spasings reaching several tens of centimeters are used in physical experiments for the production of large-cross-section charged-particle beams as well as for the separation and deflection of the particles. Under commercial vacuum condition, the breakdown voltage is strongly affected by the electrode size and surface condition and the electrode separation. Thus, for a 1-mm gap, increasing the electrode area a hundred times reduces the breakdown voltage by about one half, ill other conditions being the same. Large and intricately shaped electrodes make the system degasing and conditic'ning more complicated. Prebreakdown currents produce an extra load on the power supply circuits and, in pulsed accelerators, they distort the beam currents waveform and often difurb the normal operation of the accelerator. This has stimulated the study aimed at refining the factors affecting the breakdown voltage, elucidating the mechanism for the prebreakdown conductance in the electrode gap, and developing the methods for suppressing prebreakdcwn currents.

Paper Details

Date Published: 1 May 1994
PDF: 4 pages
Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); doi: 10.1117/12.174607
Show Author Affiliations
Nikolai N. Koval, Institute of High Current Electronics (Russia)
Yuri D. Korolev, Institute of High Current Electronics (Russia)
P. M. Shchanin, Institute of High Current Electronics (Russia)

Published in SPIE Proceedings Vol. 2259:
XVI International Symposium on Discharges and Electrical Insulation in Vacuum
Gennady A. Mesyats, Editor(s)

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