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Excitation and propagation of low frequency wave in a FRC plasma

S. Okada, K. Yamanaka, S. Yamamoto, T. Masumoto, K. Kitano, T. Asai, F. Kodera, M. Inomoto, S. Yoshimura, M. Okubo2003年被引用 10Nuclear FusionIF 3出版社

Low frequency f = ⅕ − ⅓fci, (fci: ion gyro frequency in the external field Bw) waves are excited with an antenna which is compatible with a reactor in a plasma with field reversed configuration (FRC). Near and outside the separatrix rs of the FRC plasma, though the applied wave is mainly in compressional mode, azimuthal and radial components are observed in the magnetic field disturbance of the excited wave, which propagate with the dispersion relation consistent with the shear Alfvén wave. These disturbances penetrate deep into the FRC plasma across the surface where the wave frequency exceeds local ion gyro frequency and propagate along magnetic lines of force with sound velocity, which behaviour is consistent with the shear Alfvén wave with finite temperature correction. Axial magnetic disturbance propagates axially and radially from the antenna across the plasma column.

日本語訳

低周波数 f = ⅕ − ⅓fci(fci:外部磁場 Bw におけるイオンジャイロ周波数)の波は、磁場反転配位(FRC)プラズマにおいて、リアクターと互換性のあるアンテナによって励起される。FRCプラズマのセパラトリックスrsの近傍および外部では、印加波は主に圧縮モードであるが、励起された波の磁場擾乱において方位角成分と動径成分が観測され、それらはせん断アルフヴェン波と一致する分散関係で伝播する。これらの擾乱は、波の周波数が局所イオンジャイロ周波数を超える表面を横切ってFRCプラズマの深部に浸透し、磁力線に沿って音速で伝播する。この挙動は、有限温度補正を伴うせん断アルフヴェン波と一致する。軸方向磁場擾乱は、アンテナからプラズマ柱を横切って軸方向および動径方向に伝播する。

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Field-Reversed Configuration
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