Visible Fluctuation Measurements on the TST-2 Spherical Tokamak

被引：0
|
作者：
Ejiri, Akira [1 ]
Shiraiwa, Syun'ichi [1 ]
Takase, Yuichi [1 ]
Nagashima, Yoshihiko [2 ]
Kasahara, Hiroshi [1 ]
Yamada, Takuma [2 ]
Ushigome, Masayasu [2 ]
Iijima, Daisuke [1 ]
Kobori, Yousuke [1 ]
Nishi, Tomoichirou [1 ]
Taniguchi, Tomokazu [2 ]
Yamagishi, Kenichi [2 ]
机构：
[1] Graduate School of Frontier Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
[2] Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
来源：
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 2003年 / 42卷 / 12期
关键词：
Correlation methods - Frequency response - High pass filters - Magnetic fields - Optical resolving power - Particulate emissions - Plasma probes;
D O I：
10.1143/jjap.42.7557
中图分类号：
学科分类号：
摘要：
The four-beam correlation method has a potential of measuring fine-scale fluctuations locally. In the method, many lines of sight are measured and the coherences among them are calculated. As a proof of principle experiment, a visible fluctuation measurement system has been fabricated and applied to the TST-2 spherical tokamak plasma. Using this system, fluctuations were measured and high-frequency components (100 ± 12.5kHz) were analyzed. Because of a long parallel correlation length, local information was not obtained directly. However, comparison of the experimental results and those of a model calculation suggests that (i) the fluctuating emission is relatively localized in the peripheral region of the plasma, (ii) the perpendicular correlation length is of the order of 1 cm, while the parallel one is much longer than it and (iii) the magnetic field angle in the peripheral region agrees with that estimated from magnetic measurements.
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页码：7557 / 7563
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