J. Phys. Colloques
Volume 41, Numéro C9, Novembre 1980Third International Symposium on Gas-Flow and Chemical Lasers
|Page(s)||C9-471 - C9-477|
J. Phys. Colloques 41 (1980) C9-471-C9-477
THEORY OF A CW SUPERSONIC NITROGEN RECOMBINATION LASERW. Schall
Institut für Technische Physik, DFVLR, D-7000 Stuttgart 80, Fed. Rep. Germany
Quasi-two dimensional model calculations show the possibility to realize a cw atomic nitrogen laser, pumped by the recombination process in rapidly expanded plasma flows. Sufficient gain for lasing is demonstrated for stagnation conditions of 13 000 ≤ To ≤ 24 000 K and 2 ≤ Po ≤ 30 kPa. Location and size of the gain regimes in the flow direction depend on the plasma starting condition. At a wavelength of 0.91 µm values of small signal gain up to 0.6 m-1 can be attained. The model is described and some selected results are presented. The effect of the electron heat conduction is discussed.