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Proceedings Paper

Pseudospark switches for high-power applications
Author(s): Andreas Goertler; Jens Christiansen; S. Doellinger; K. H. Frank; U. Herleb; S. Insam; T. Mehr; M. Schlaug; A. Schwandner; R. Tkotz
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Paper Abstract

Longterm tests with several electrode materials and discharge channel arrangements were performed. Two possible geometries were tested, a radial and a coaxial one. Optical fast shutter technique, and spectroscopic and interferometric methods were used to get more information about the discharge-character, the pinching of the discharge channels due to magnetic forces, and the erosion mechanism. The homogeneous ignition and the equal distribution of the current into the individual discharge channels was proved by fast photography and current measurements. At currents exceeding some kA the pseudospark transforms from a specific hollow cathode discharge into a metal-vapor-arc like behavior. Measurements of the forward voltage drop provide values of less than 100 V which are typical for metal-vapor-arcs. Also cathode spots and their traces on the electrode surface were observable. The performance of these switches in pulsed power devices will be reported.

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: 10.1117/12.174592
Show Author Affiliations
Andreas Goertler, Univ. of Erlangen-Nuremberg (Germany)
Jens Christiansen, Univ. of Erlangen-Nuremberg (Germany)
S. Doellinger, Univ. of Erlangen-Nuremberg (Germany)
K. H. Frank, Univ. of Erlangen-Nuremberg (Germany)
U. Herleb, Univ. of Erlangen-Nuremberg (Germany)
S. Insam, Univ. of Erlangen-Nuremberg (Germany)
T. Mehr, Univ. of Erlangen-Nuremberg (Germany)
M. Schlaug, Univ. of Erlangen-Nuremberg (Germany)
A. Schwandner, Univ. of Erlangen-Nuremberg (Germany)
R. Tkotz, Univ. of Erlangen-Nuremberg (Germany)

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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