Plasma and Fusion Research

Volume 7, 2402092 (2012)

Regular Articles

Off-Axis Temperature Anisotropy Measurement by Double-Pass Thomson Scattering Diagnostic System on TST-2
Junichi HIRATSUKA, Akira EJIRI, Makoto HASEGAWA1), Yoshihiko NAGASHIMA1), Yuichi TAKASE, Hiroshi TOJO2), Takashi YAMAGUCHI, Takanori AMBO, Hirokazu FURUI, Takahiro HASHIMOTO, Hidetoshi KAKUDA, Kunihiko KATO, Takuya OOSAKO, Takuya SAKAMOTO, Ryota SHINO, Takahiro SHINYA, Masateru SONEHARA, Takuma WAKATSUKI and Osamu WATANABE
The University of Tokyo, Kashiwa 277-8561, Japan
1)
Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
2)
Japan Atomic Energy Agency, 801-1 Mukoyama, Naka-shi, Ibaraki 311-0193, Japan
(Received 2 December 2011 / Accepted 24 April 2012 / Published 26 July 2012)

Abstract

We have developed a multi-point Thomson scattering system with double-pass configuration for the TST-2 device and have installed new collection optics for the same. Temperature and density can now be measured simultaneously at four points by using four fibers and four polychromators. Herein, we present results of off-axis temperature anisotropy measurements performed with this system, in which no temperature anisotropy beyond the error bar was observed for ohmic plasmas.

Keywords

Thomson scattering, double-pass configuration, temperature anisotropy, multi-point diagnostics, TST-2

DOI: 10.1585/pfr.7.2402092

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References

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This paper may be cited as follows:

Junichi HIRATSUKA, Akira EJIRI, Makoto HASEGAWA, Yoshihiko NAGASHIMA, Yuichi TAKASE, Hiroshi TOJO, Takashi YAMAGUCHI, Takanori AMBO, Hirokazu FURUI, Takahiro HASHIMOTO, Hidetoshi KAKUDA, Kunihiko KATO, Takuya OOSAKO, Takuya SAKAMOTO, Ryota SHINO, Takahiro SHINYA, Masateru SONEHARA, Takuma WAKATSUKI and Osamu WATANABE, Plasma Fusion Res. 7, 2402092 (2012).