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Proceedings Paper

Investigations of a photo-triggered HF laser
Author(s): F. Doussiet; M. Legentil; S. Pasquiers; C. Postel; Vincent Puech; Laurent Richeboeuf
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Paper Abstract

X-ray photo-triggered discharges have been used to energetize Ne/SF6/H2 and Ne/SF6/C2H6 gas mixtures. For a discharge volume of 312 cm3 an output energy as high as 3.0 J has been obtained in the ethane mixture, while the best laser performance achieved in the hydrogen mixture is only 1.8 J. The physical reasons which could explain these differences, i.e. different kinetic pathways leading to the formation of the HF molecule, or the onset of discharge instabilities, have been investigated. It is shown, experimentally and theoretically, that the production of atomic fluorine weakly depends on the gas mixture type. A time resolved imagery of the interelectrodes space emphasized that the Ne/SF6/H2 active medium degenerates into a spatially inhomogeneous plasma, whereas a very stable homogeneous discharge is obtained in the Ne/SF6/C2H6 mixture. As a result the onset of a discharge instability is responsible for the laser emission collapse at low hydrogen partial pressure and high initial applied electric field values.

Paper Details

Date Published: 29 March 1996
PDF: 12 pages
Proc. SPIE 2702, Gas and Chemical Lasers, (29 March 1996); doi: 10.1117/12.236870
Show Author Affiliations
F. Doussiet, Univ. Paris-Sud (France)
M. Legentil, Univ. Paris-Sud (France)
S. Pasquiers, Univ. Paris-Sud (France)
C. Postel, Univ. Paris-Sud (France)
Vincent Puech, Univ. Paris-Sud (France)
Laurent Richeboeuf, Univ. Paris-Sud (France)

Published in SPIE Proceedings Vol. 2702:
Gas and Chemical Lasers
Robert C. Sze, Editor(s)

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