High-current discharge pumping of ArF, F2 lasers without cathode hot spots and filament instabilities

Alexei B. Treshchalov; A. Lissovski; E. Chikeev

doi:10.1117/12.460130

26 March 2002 High-current discharge pumping of ArF, F₂ lasers without cathode hot spots and filament instabilities

Alexei B. Treshchalov, A. Lissovski, E. Chikeev

Proceedings Volume 4747, International Conference on Atomic and Molecular Pulsed Lasers IV; (2002) https://doi.org/10.1117/12.460130
Event: International Conference on Atomic and Molecular Pulsed Lasers IV, 2001, Tomsk, Russian Federation

Abstract

The aim of this work is spectroscopic diagnostics of a discharge in a new compact 'sealed-off' excimer laser. Spatial-time behaviors of the main excited atomic and ionic species, gas temperature and electron density were monitored with ns-gated ICCD camera from spontaneous emission spectra of the discharge. Ignition of cathode hot spots is detected from atomic emission lines of a cathode material. At increased current density cathode hot spots appear after the end of the pumping pulse because of delayed explosion of overheated emission centers on the cathode surface. No constrictions have been developed in the discharge from these spots because the pumping is very short. At highest pulse repetition rate discharge constriction is initiated from accumulated overheating of the boundary gas layer near the cathode surface.

Citation Download Citation

Alexei B. Treshchalov, A. Lissovski, and E. Chikeev "High-current discharge pumping of ArF, F₂ lasers without cathode hot spots and filament instabilities", Proc. SPIE 4747, International Conference on Atomic and Molecular Pulsed Lasers IV, (26 March 2002); https://doi.org/10.1117/12.460130

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