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Dynamics of particle flux in a cylindrical magnetized plasma

S Oldenbürger, S Inagaki, T Kobayashi, H Arakawa, N Ohyama, K Kawashima, Y Tobimatsu, A Fujisawa, K Itoh, S-I Itoh2012年Plasma Physics and Controlled FusionIF 2.2出版社

Fluctuation-induced cross-field convective particle flux is studied in the cylindrical magnetized plasma assembly for non-linear turbulence analysis (PANTA). The plasma presents a wave turbulence characterized by a limited number of developing modes. To study the link between mode dynamics and particle transport, frequency-dependent time evolution of transport is obtained by applying complex continuous wavelet decomposition on spatio-temporal data from electrostatic probes. The method is shown to recover transport description consistent with other analysis methods for a weakly turbulent state. For a plasma state featuring a large non-sinusoidal structure, the time evolution of transport on the second harmonic of the main fluctuation shows a slow modulation of azimuthal mode number m = 0 with similarities to a zonal perturbation.

日本語訳

揺動誘起の横断方向対流粒子フラックスが、非線形乱流解析用円筒磁化プラズマ装置(PANTA)において研究された。当該プラズマは、限られた数の発展モードによって特徴づけられる波動乱流を示す。モード動力学と粒子輸送の関連を研究するため、静電プローブからの時空間データに複素連続ウェーブレット分解を適用し、周波数依存の輸送時間発展を得た。この手法は、弱い乱流状態において、他の解析手法と整合する輸送記述を再現することが示された。大きな非正弦波構造を特徴とするプラズマ状態では、主揺動の第二高調波における輸送の時間発展が、帯状擾乱に類似した方位角モード数m=0の緩やかな変調を示した。

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Magnetized plasma
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