Recombination lasing in a magnetoplasmadynamic arcjet
作者:
E. M. Campbell,
R. G. Jahn,
W. F. von Jaskowsky,
K. E. Clark,
期刊:
Journal of Applied Physics
(AIP Available online 1980)
卷期:
Volume 51,
issue 1
页码: 109-117
ISSN:0021-8979
年代: 1980
DOI:10.1063/1.327402
出版商: AIP
数据来源: AIP
摘要:
The plasmadynamic recombination laser concept is verified experimentally in a high‐power quasisteady MPD arcjet operating at 4 kA and 12 g/sec of argon. Measurements of the spatial variation of electron temperature, electron density, and population densities in the arc exhaust flow confirm that inverted populations of the 4pto 4sAr II transitions are established by collisional‐radiative recombination of the Ar III ion. Using an optical cavity aligned transversely to the flow, recombination lasing of seven such transitions, 5145, 4880, 4764, 4727, 4658, 4579, and 4545 A˚, is observed spectrophotograpically and photoelectrically over the entire 1‐msec discharge.
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