Electron Temperature Measurement on QUEST Spherical Tokamak by Thomson Scattering System
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概要
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On QUEST, we are carrying out the steady state operation by RF current drive. A Thomson scattering (TS) system has been constructed to measure the plasma electron temperature. This system consists of a Nd:YAG laser of energy 1.65 J, a spherical mirror for collection of the scattering light, and a polychromator for spectroscopy. Because the Thomson scattering signal is weak for the low-density RF-sustained plasma, many scattering pulse signals were accumulated from steady-state plasmas. Electron temperature profiles were obtained for the steadystate spherical tokamak (ST) plasma for the first time. Six spatial points were measured by moving the fiber position, and the plasma electron temperature was in the range 10-500 eV.
著者
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NARIHARA Kazumichi
National Insitute for Fusion Science
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Takase Yuichi
Graduate School Of Frontier Sciences The Univ. Of Tokyo
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Ejiri Akira
Graduate School Of Frontier Science University Of Tokyo
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HASEGAWA Makoto
Research Institute for Applied Mechanics, Kyushu University
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ZUSHI Hideki
Research Institute for Applied Mechanics, Kyushu University
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Nagashima Yoshihiko
Research Institute For Applied Mechanics Kyushu University
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Yamaguchi Takashi
Graduate School Of Engineering Dept. Of Metallurgy University Of Tokyo
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HIRATSUKA Junichi
Graduate School of Science, The University of Tokyo
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QUEST group
Research Institute for Applied Mechanics, Kyushu University
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TAKASE Yuichi
Graduate School of Frontier Science, University Tokyo, Kashiwa 277-8561, Japan
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HIRATSUKA Junichi
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
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