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.

引用

页码：7557 / 7563

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