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Proceedings Paper

Improving discharge-initiated HF/DF lasers using chain reaction
Author(s): Bernard Lacour; Vincent Puech; Boris S. Alexandrov; Constantin A. Kutumov; Evgueni A. Klimuk; Georgyi A. Troshchinenko
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Paper Abstract

A few years ago, it has been demonstrated that the use of hydrocarbons such as C2H4 or C6H12 as hydrogen donor allows realizing high-volume discharges in SF6 based non-chain HF/DF gas mixture. Although high energy, short pulses and high repetition rates have been obtained, for some uses the specific output energy, the efficiency and, to a less extent, the optical quality of all these lasers remain insufficient. IT appears now that the only way to increase these values is to use chain reaction. But chain reaction is known to be delicate to control, especially when working at high repetition rate. This paper will describe recent work directed towards a better understanding of the discharge mechanisms and an increase of the efficiency and of the specific output energy of HF/DF pulsed lasers using chain reaction in discharge initiated repetitive and non-repetitive experiments. High volume discharge cells compatible with repetition rate have been realized. Discharge initiated repetitive chain reaction ash been studied up to 10Hz with large gap. Efficiencies as high as 70% have been obtained in single pulse experiments. Computer modeling allows now predicting satisfactorily the performances of discharge-initiated chain reaction HF/DF lasers as a function of electric circuit characteristics and gas composition.

Paper Details

Date Published: 23 March 2005
PDF: 8 pages
Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); doi: 10.1117/12.611146
Show Author Affiliations
Bernard Lacour, Univ. de Physique des Gaz et des Plasmas (France)
Univ. Paris-Sud (France)
CNRS (France)
Vincent Puech, Lab. de Physique des Gaz et des Plasmas (France)
Univ. Paris-Sud (France)
CNRS (France)
Boris S. Alexandrov, Russian Scientific Ctr. (Russia)
Constantin A. Kutumov, Russian Scientific Ctr. (Russia)
Evgueni A. Klimuk, Russian Scientific Ctr. (Russia)
Georgyi A. Troshchinenko, Russian Scientific Ctr. (Russia)


Published in SPIE Proceedings Vol. 5777:
XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Jarmila Kodymova, Editor(s)

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