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Fast charge exchange spectroscopy using a Fabry-Perot spectrometer in the JIPP TII-U tokamak

K Ida, J Xu, K.N Sato, H Sakakita1997年Fusion Engineering and DesignIF 1.7出版社

AbstractA new charge exchange spectroscopic technique using a Fabry-Port spectrometer has been developed to increase the photon flux at the detector, and to improve the time resolution of ion temperature and plasma rotation velocity measurements. The spectral resolution is obtained by arranging two-dimensional fiber-optics and a two-dimensional detector at the focal plane of a coupled lens located on both sides of a Fabry-Perot spectrometer. The effective finesse (the ratio of the spectral resolution to the free spectral range) of the Fabry-Perot interferometer in this system is 14. The time evolution of the ion temperature is obtained with a time resolution of 125 gs and with a spatial resolution of 3 cm (eight channels).

日本語訳

新しい電荷交換分光技術が、ファブリ・ペロー分光計を用いて開発され、検出器での光子束を増加させ、イオン温度およびプラズマ速度測定の時間分解能を向上させた。スペクトル分解能は、ファブリ・ペロー分光計の両側に配置された結合レンズの焦点面に二次元光ファイバーアレイと二次元検出器を配置することによって得られる。このシステムにおけるファブリ・ペロー干渉計の実効フィネス(スペクトル分解能と自由スペクトル領域の比)は14である。イオン温度の時間変化は、時間分解能125gs、空間分解能3cm(8チャンネル)で取得される。

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