Pseudospark switches for excimer-lasers and pulsed CO2 lasers

Andreas Goertler; R. Tkotz; H. Arenz; Peter G. Bickel; Jens Christiansen; K. H. Frank; U. Herleb; T. Mehr; M. Schlaug; A. Schwandner

doi:10.1117/12.184584

16 August 1994 Pseudospark switches for excimer-lasers and pulsed CO₂ lasers

Andreas Goertler, R. Tkotz, H. Arenz, Peter G. Bickel, Jens Christiansen, K. H. Frank, U. Herleb, T. Mehr, M. Schlaug, A. Schwandner

Author Affiliations +

Proceedings Volume 2206, High-Power Gas and Solid State Lasers; (1994) https://doi.org/10.1117/12.184584
Event: Europto High Power Lasers and Laser Applications V, 1994, Vienna, Austria

Abstract

Sealed-off, metal-ceramic pseudospark switches are currently being developed as a replacement for conventional thyratrons in pulsed gas discharge lasers. In this contribution the performance of different type of pseudospark switches at different load conditions typical for pulsed gas discharge lasers is discussed. Experiments were performed at a low inductive 1 (Omega) water pulse line at holdoff voltages of up to 32 kV with a dI/dt of 6 X 10¹¹ A/s (10% - 90%) and a maximum current of 30 kA. Switch parameters were continuously recorded at repetition rates of up to 100 Hz. In a second experiment the long-term behavior of a pseudospark switch in an excimer laser test circuit was investigated. At a repetition rate of 233 Hz and a charging voltage of 22 kV a nearly unipolar current pulse of about 10 kA in amplitude with a length of 170 ns (FWHM) was obtained. Again switch parameters were on- line recorded. Further the power loss to the electrodes could be determined. Performance of those type of pseudospark switches and the application in real laser systems are discussed.

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Andreas Goertler, R. Tkotz, H. Arenz, Peter G. Bickel, Jens Christiansen, K. H. Frank, U. Herleb, T. Mehr, M. Schlaug, and A. Schwandner "Pseudospark switches for excimer-lasers and pulsed CO₂ lasers", Proc. SPIE 2206, High-Power Gas and Solid State Lasers, (16 August 1994); https://doi.org/10.1117/12.184584

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