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Laboratory evidence for stationary inertial Alfvén waves

M E Koepke, S M Finnegan, S Vincena, D J Knudsen, S H Nogami, D Vassiliadis2016年Plasma Physics and Controlled FusionIF 2.2出版社

Azimuthal convective flow and density-depleted magnetic field-aligned current co-located in the helium plasma produced in the large plasma device (LAPD-U) at UCLA (Gekelman et al 2016 Rev. Sci. Instrum. 87025105) support an Alfvénic perturbation that is static in the laboratory frame. Electrostatic probes measure the flow and static density perturbations in the 72 cm-diameter, 12 m-long, afterglow plasma, wherein a radially segmented electrode creates the convective flow and an off-cylindrical-axis planar-mesh electrode draws current in a channel parallel to the background magnetic field. This stationary 'wave' is measured as a fixed (in the laboratory frame) ion density structure.

日本語訳

方位角対流と密度が減少した磁場平行電流チャネルは、UCLAの大型プラズマ装置(LAPD-U)において(Gekelmanら 2016 Rev. Sci. Instrum. 87025105)、静的な枠組みにおけるアルフヴェン擾乱を支持する。静電プローブは、直径72cm、長さ12mの余韻プラズマ中の流れと静的な密度擾乱を測定し、ここでは径方向に分割された電極が対流を生成し、円筒軸から外れた平面メッシュ電極が背景磁場に平行なチャネル内に電流を引き込む。この定常的な「波」は、実験室の枠組みにおいて固定されたイオン密度構造として測定される。

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