Spectroscopic Plasma Diagnostics for Advanced Aerospace Vehicles.
Interim scientific rept. for 1968-70,
TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES
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A great deal of research in recent years has been directed to developing ways of generating an inverted population in order to produce lasing action. The current research programme has been concerned with using laser radiation to redistribute the atomic level population of some species in order to probe the conditions within a gas or plasma. When an atomic transition is optically pumped by an appropriately tuned beam of laser radiation the population in the upper state of the transition can be considerably enhanced along the path of the beam. This will give rise to an intensification of the spontaneous emission emanating from the overpopulated state. It is from a study of this intensified emission that information can be ascertained pertaining to the condition of the specific volume element being pumped. The authors refer to this technique as Selective Excitation Spectroscopy. Author
- Plasma Physics and Magnetohydrodynamics