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Magnetic fluctuations in the range of ion cyclotron frequency in ULQ and RFP plasmas

S Takeji, Y Hirano, N Inoue, J Miyazawa, J Morikawa, Y Ogawa, K Sasaki, M Watanabe, Z Yoshida1995年Plasma Physics and Controlled FusionIF 2.2出版社

Magnetic fluctuations in the range of the ion cyclotron frequency ( omega ci) are excited in the start-up and relaxation phases of ULQ and RFP plasmas. The fluctuations have high coherence in the omega ci range, and have the wavenumber vector k directed almost perpendicular with respect to the ambient magnetic field. The parallel component of k is in the direction of the electron drift (opposite to the plasma current), while the perpendicular component is in the direction of the ion diamagnetic drift. These fluctuations are considered to be excited by the micro-instability of ion cyclotron waves induced by fast electrons.

日本語訳

イオンサイクロトロン周波数(ω_ci)の範囲における磁気揺動は、ULQおよびRFPプラズマの立ち上げ期と緩和期に励起される。この揺動はω_ciの範囲で高いコヒーレンスを有し、その波数ベクトルkは周囲の磁場に対してほぼ垂直方向を向いている。kの平行成分は電子のドリフト方向(プラズマ電流と逆方向)であり、垂直成分はイオンの反磁性ドリフト方向である。これらの揺動は、高速電子によって誘起されるイオンサイクロトロン波の微視的不安定性によって励起されると考えられる。

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Reversed field pinchMagnetic fluctuations
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