Laser-Aided Plasma Diagnositcs

TitleLaser-Aided Plasma Diagnositcs
Publication TypeJournal Article
Year of Publication2000
AuthorsC.J Barth
JournalFusion Technology
Volume37
Number2T
Pagination344-351
Date PublishedMar
ISBN Number0748-1896
Abstract

The invention of the first laser and many others after that has led to a large amount of different plasma diagnostics using some aspect of the interaction between light and plasmas. In this paper a short review of these diagnostics is given, where the emphasis will be on Thomson scattering and Laser Induced Fluorescence. Thomson scattering is a very powerful diagnostic which is applied at nearly every magnetic confinement device. When the laser wavelength is much smaller than the plasma Debye length, the scattering spectrum is a reflection of the electron velocity distribution, from which local values for the electron temperature and density can be derived. Laser Induced Fluorescence enables to determine the neutral density of different species in the plasma.

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