TITLE

Stray light analysis for the Thomson scattering diagnostic of the ETE Tokamak

AUTHOR(S)
Berni, L. A.; Albuquerque, B. F. C.
PUB. DATE
December 2010
SOURCE
Review of Scientific Instruments;Dec2010, Vol. 81 Issue 12, p123504
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Thomson scattering is a well-established diagnostic for measuring local electron temperature and density in fusion plasma, but this technique is particularly difficult to implement due to stray light that can easily mask the scattered signal from plasma. To mitigate this problem in the multipoint Thomson scattering system implemented at the ETE (Experimento Tokamak Esférico) a detailed stray light analysis was performed. The diagnostic system was simulated in ZEMAX software and scattering profiles of the mechanical parts were measured in the laboratory in order to have near realistic results. From simulation, it was possible to identify the main points that contribute to the stray signals and changes in the dump were implemented reducing the stray light signals up to 60 times.
ACCESSION #
65091188

 

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