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

Soichiro KAINAGA, Akira EJIRI¹⁾, Yuichi TAKASE¹⁾, Osamu WATANABE²⁾, Yuuki ADACHI¹⁾, Takuya OOSAKO¹⁾, Makoto SASAKI, Hiroshi TOJO¹⁾, Tetsuya MASUDA¹⁾, Junichi SUGIYAMA¹⁾ and Takashi YAMAGUCHI¹⁾

Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan

1)

Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

2)

High Temperature Plasma Center, The University of Tokyo, Kashiwa 277-8568, Japan

(Received 21 March 2008 / Accepted 28 April 2008 / Published 5 June 2008)

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.

Copyright (c) 2008 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

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

DOI: 10.1585/pfr.3.027

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References

• [1] Y. Takase et al., Nucl. Fusion 41, 1543 (2001).
• [2] M. Ono, Phys. Plasmas 2, 4075 (1995).

This paper may be cited as follows:

Soichiro KAINAGA, Akira EJIRI, Yuichi TAKASE, Osamu WATANABE, Yuuki ADACHI, Takuya OOSAKO, Makoto SASAKI, Hiroshi TOJO, Tetsuya MASUDA, Junichi SUGIYAMA and Takashi YAMAGUCHI, Plasma Fusion Res. 3, 027 (2008).