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Lasing of extreme ultraviolet light with nitrogen plasma in a recombining phase-Roles of doubly excited states

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4729172· OSTI ID:22072496
; ; ; ;  [1]
  1. Department of Energy Sciences, Tokyo Institute of Technology, Nagatsuta 4259, Midori, Yokohama, Kanagawa (Japan)
Focused are the properties of population inversion with nitrogen plasma between n = 3 and 2 of a hydrogen-like state in a recombining phase. The population inversion is calculated in the framework of population kinetics, and the gain coefficient G is estimated. The maximum plasma length L is approximated by a product of the duration of population inversion {tau}{sub e} and the speed of light c. In the calculation, dielectronic-capture ladderlike (DL) processes are considered. At the plasma ion densities of 10{sup 17-18} cm{sup -3} with a rapid cooling, the DL deexcitations make a large contribution to the population inversion, resulting in GL=5-10, and the prescription of plasma cooling is found to be definitely critical.
OSTI ID:
22072496
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
Country of Publication:
United States
Language:
English

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