Development of a Compact Thomson Scattering System for the TST-2 Spherical Tokamak

Soichiro KAINAGA; Akira EJIRI; Yuichi TAKASE; Osamu WATANABE; Yuuki ADACHI; Takuya OOSAKO; Makoto SASAKI; Hiroshi TOJO; Tetsuya MASUDA; Junichi SUGIYAMA; Takashi YAMAGUCHI

doi:10.1585/pfr.3.027

Rapid Communications

Development of a Compact Thomson Scattering System for the TST-2 Spherical Tokamak

Soichiro KAINAGA, Akira EJIRI, Yuichi TAKASE, Osamu WATANABE, Yuuki ADACHI, Takuya OOSAKO, Makoto SASAKI, Hiroshi TOJO, Tetsuya MASUDA, Junichi SUGIYAMA, Takashi YAMAGUCHI

Author information

Soichiro KAINAGA
Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
Akira EJIRI
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
Yuichi TAKASE
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
Osamu WATANABE
High Temperature Plasma Center, The University of Tokyo, Kashiwa 277-8568, Japan
Yuuki ADACHI
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
Takuya OOSAKO
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
Makoto SASAKI
Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
Hiroshi TOJO
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
Tetsuya MASUDA
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
Junichi SUGIYAMA
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
Takashi YAMAGUCHI
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

Keywords: spherical tokamak, TST-2, Thomson scattering, Newtonian mirror system

JOURNAL FREE ACCESS

2008 Volume 3 Pages 027

DOI https://doi.org/10.1585/pfr.3.027

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Abstract

A compact Nd:YAG laser Thomson scattering system was constructed and applied to the TST-2 spherical tokamak in order to measure the electron temperature and the electron density. A large solid angle (∼35 msr) was achieved by use of a compact Newtonian mirror system for the collection optics. Absolute calibration was performed by Rayleigh scattering. An electron temperature increase from 140 eV to 210 eV was observed upon injection of 200 kW of RF power.

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