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Proceedings Paper

Arc heater for thermal driven HF/DF chemical laser
Author(s): Andre Sontag; Jean-Marie Baronnet
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Paper Abstract

A new concept of plasma heater has been developed using water vapor as plasma gas (1). It also operates with sulfur-hexafluoride diluted with nitrogen and oxygen; it makes it possible to use it as an F-atoms generator for an arc heated supersonic diffusion HF/DF laser. The fluorine atoms are created by dissociation of SF6 injected directly into the arc heater with argon, nitrogen and oxygen as diluents. As compared with the well known arc heater (2) in which the fluorinatcd gas is mixed in an arc heated helium flow, a higher dissociation rate of this gas is obtained. The arc heater is powered by a rectifier of 500 V and 250 A. For an electrical input power of 80 kW, we obtain a thermal efficiency of above 80 % and a specific enthalpy, at the output of the arc heater, of 8.3 MJ/kg. The described F-atoms generator will be equipped in the near future with an axisymmetric nozzle array, in order to complete the entire HF/DF laser device.

Paper Details

Date Published: 1 February 1991
PDF: 4 pages
Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); doi: 10.1117/12.25913
Show Author Affiliations
Andre Sontag, French-German Research Institute of Saint-Louis (France)
Jean-Marie Baronnet, Univ. of Limoges (France)


Published in SPIE Proceedings Vol. 1397:
8th Intl Symp on Gas Flow and Chemical Lasers

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