Au-II 282 nm segmented hollow-cathode laser-parametric studies and modeling

Autor:	Karoly Rozsa, Kinga Kutasi, Gregor Bánó, P. Horváth, L. Szalai, Tadeusz M. Adamowicz, Zoltan Donko
Rok vydání:	2002
Předmět:	Argon Physics::Instrumentation and Detectors Chemistry Buffer gas General Physics and Astronomy chemistry.chemical_element Laser Cathode law.invention Ion Physics::Plasma Physics Sputtering law Laser power scaling Gas-filled tube Atomic physics
Zdroj:	Journal of Applied Physics. 92:6372-6383
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1510172
Popis:	Laser operation on the Au-II 282.3 nm ultraviolet transition is obtained using a high-voltage segmented hollow-cathode discharge tube. The metal vapor is produced by means of cathode sputtering. A small amount of argon is added to the helium buffer gas in order to achieve higher sputtering yield. Measurements of the laser power and small signal gain indicate that the optimal partial concentration of argon is in the range of 0.25%–0.75%. Quasi-continuous wave output power of 100 mW is obtained from a 34-cm-long active region while the highest small-signal gain is 52% m−1. To explain the basic features of the laser operation we present a model of the segmented hollow-cathode discharge. All the discharge characteristics are calculated in a self-consistent way except the temperature of slow electrons. The trajectories of fast electrons emitted from the cathode are followed by Monte Carlo simulation. Rate equations of ion, metastable and metal atom densities are solved in the negative glow, while another Monte...
Databáze:	OpenAIRE
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