Visible Fluctuation Measurements on the TST-2 Spherical Tokamak

Akira Ejiri, Syun'ichi Shiraiwa, Yuichi Takase, Yoshihiko Nagashima, Hiroshi Kasahara, Takuma Yamada, Masayasu Ushigome, Daisuke Iijima, Yousuke Kobori, Tomoichirou Nishi, Tomokazu Taniguchi, Kenichi Yamagishi

研究成果: ジャーナルへの寄稿学術誌査読


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.

ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
出版ステータス出版済み - 12月 2003

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)
  • 物理学および天文学(全般)


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