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Proceedings Paper

High-repetition-rate pseudospark switches for pulsed high-power lasers
Author(s): Peter G. Bickel; Jens Christiansen; K. H. Frank; Andreas Goertler; Werner Hartmann; Claudius Kozlik; Peter Wiesneth
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Paper Abstract

The experimental results of high-repetition-rate pseudospark switch testing are reported, with particular interest in applications like high-repetition- rate, high-average power excimer lasers and pulsed TEA CO2 lasers. Typical test parameters are hold-off voltage of about 20 kV, peak currents around 15 kA, and pulse durations of less than 100 ns, discharge conditions that are typical for high average power excimer lasers. These were realized in a low inductive discharge circuit using discrete ceramic capacitors of up to 10 nF total capacitance and an impedance of about 1 (Omega) . The resulting peak currents were about 19 kA in the short-circuited, ringing discharge. A special feature of the switch is being capable to withstand severe current reversal, high rates of current rise of about 5*1011 A/s and peak currents above 20 kA. Some 107 shots have been performed with a sealed-off metal-ceramic pseudospark switch with integrated hydrogen reservoir without degradation of the switch performance. In this setup, repetition rates of up to 1.8 kHz were achieved. The switch-triggering behavior and measurements of the switch resistance in dependence of the peak current are reported.

Paper Details

Date Published: 1 September 1991
PDF: 9 pages
Proc. SPIE 1503, Excimer Lasers and Applications III, (1 September 1991); doi: 10.1117/12.46929
Show Author Affiliations
Peter G. Bickel, Friedrich-Alexander-Univ. of Erlangen/Nuernberg (Germany)
Jens Christiansen, Friedrich-Alexander-Univ. of Erlangen/Nuernberg (Germany)
K. H. Frank, Univ. Erlangen-Nuernberg (Germany)
Andreas Goertler, Friedrich-Alexander-Univ. of Erlangen/Nuernberg (Germany)
Werner Hartmann, Friedrich-Alexander-Univ. of Erlangen/Nuernberg (Germany)
Claudius Kozlik, Friedrich-Alexander-Univ. of Erlangen/Nuernberg (Germany)
Peter Wiesneth, Friedrich-Alexander-Univ. of Erlangen/Nuernberg (Germany)

Published in SPIE Proceedings Vol. 1503:
Excimer Lasers and Applications III
Tommaso Letardi; Lucien Diego Laude, Editor(s)

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