Forbidden Transition in Helium for Measurement of Fluctuating Electric Fields in Plasmas with Aid of Resonant Absorption
- 1 October 1981
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 20 (10) , L761-763
- https://doi.org/10.1143/jjap.20.l761
Abstract
Possible forbidden transition in helium is suggested for the measurement of fluctuations in plasmas. Instead of the three-level system, four-level system is proposed; one of the lower levels is a metastable state 21S, from which the resonant absorption is performed by using a high-power dye-laser to populate an upper level. A result calculated quantum mechanically is presented. The advantages of this method as compared with the usual technique of the plasma satellite line are discussed.Keywords
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