Demonstration of in-situ relative calibration method for a Thomson scattering diagnostic on TST-2

TST-2装置でのトムソン散乱計測におけるその場相対較正法の実証

Tojo, Hiroshi; Ejiri, Akira*; Hiratsuka, Junichi*; Yamaguchi, Takashi*; Takase, Yuichi*; Itami, Kiyoshi

This paper presents experimental demonstrations of an in-situ calibration method for Thomson scattering diagnostics in the TST-2 spherical tokamak. Electron temperature $T_{rm e,c}$ from this new method shows a good agreement with $T_{rm e,2}$ from the single (second) pass within $langle |T_{rm e,c}-T_{rm e,2}|/T_{rm e,2}rangle = 3.7%$ for a wide $T_{rm e}$ range (100-400 eV). Relative sensitivities among spectral channels can be then obtained from $T_{rm e,c}$ without accessing to the machines. Although some deviations are observed in a spectral channel, the sensitivities from this new method tend to correspond to the true (directly measured) values within 5%, providing a feasibility of application to Thomson scattering diagnostics in severe radiation condition.

使用言語	:	English
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発表会議名	:	21st International Toki Conference on Integration of Fusion Science and Technology for Steady State Operation (ITC-21)
開催年月	:	2011/11
開催都市	:	Toki
開催国	:	Japan
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使用施設	:	JT-60(臨界プラズマ試験装置)
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受委託・共同研究相手機関	:	東京大学

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