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Understanding the spatial structure of RF-induced SOL modifications

L Colas, A Ekedahl, M Goniche, J P Gunn, B Nold, Y Corre, V Bobkov, R Dux, F Braun, J-M Noterdaeme2007年Plasma Physics and Controlled FusionIF 2.2出版社

This paper summarizes recent experimental characterization of radio frequency (RF)-induced scrape-off layer (SOL) modifications in ASDEX-Upgrade (AUG), JET and Tore Supra (TS). Geometrical aspects are emphasized: complex SOL patterns are observed by several indicators visualized in one or two dimensions transverse to the magnetic field lines. Results are ascribed to inhomogeneous RF-induced SOL biasing around powered ion cyclotron range of frequencies antennas and associated E × B0 density convection (D'Ippolito et al 1993 Phys. Fluids B 5 3603). Within a simple RF sheath model (Perkins 1989 Nucl. Fusion29 583), the shape of convective cells on TS can be interpreted in terms of RF-sheath generation by parallel RF currents. Some lessons are drawn for future machines.

日本語訳

本論文は、ASDEX-Upgrade(AUG)、JET、およびTore Supra(TS)における高周波(RF)誘起スクレイプオフ層(SOL)変調の最近の実験的特徴付けをまとめたものである。幾何学的側面が強調される:複雑なSOLパターンは、磁場線に横断する1次元または2次元で可視化された複数の指標によって観測される。結果は、通電中のイオンサイクロトロン周波数帯(ICRF)アンテナ周辺における不均一なRF誘起SOLバイアスと、それに伴うE×B₀密度対流に帰属される(D'Ippolitoら 1993 Phys. Fluids B 5 3603)。単純なRFシースモデル(Perkins 1989 Nucl. Fusion 29 583)内では、TS上の対流セルの形状は、平行RF電流によるRFシース生成の観点から解釈できる。将来の装置に向けていくつかの教訓が導出される。

装置

asdex-upgrade低精度(概要文一致)jet低精度(概要文一致)

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Scrape-off layer
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