第3段階非協同レーザートムソン散乱によるプラズマ計測の進展

概要

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We classify the incoherent laser Thomson scattering (LTS) diagnostics of plasmas for measurements of electron density n_e and temperature T_e (or more generally electron energy distribution functions; EEDFs) as having evolved from the first stage, in which a whole Thomson spectrum is obtained during a single laser pulse from plasmas having n_e above 10^<18>m^<-3>, through the second stage, in which data accumulation is prerequisite for n_e below 10^<18>m^<-3>, and to the third stage, in which measurements from a material surface as close as a few tens of μm is required. In this last case, a strong suppression of stray light in addition to the data accumulation is necessary, and this was first demonstrated for a PDP (plasma display panel)-like discharge in 2000. In order to further expand its applicable range, we have been pursuing a more systematic approach, taking into account factors such as laser propagation/profile control, further stray light suppression, and other aspects. In this review article, we describe these developments and discuss future plans.
社団法人プラズマ・核融合学会の論文
2004-02-25