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Overview of TFTR transport studies

R J Hawryluk, V Arunasalam, C W Barnes, M Beer, M Bell, R Bell, H Biglari, M Bitter, R Boivin, N L Bretz1991年Plasma Physics and Controlled FusionIF 2.2出版社

A review of TFTR plasma transport studies is presented. Parallel transport and the confinement of suprathermal ions are found to be relatively well described by theory. Cross-field transport of the thermal plasma, however, is anomalous with the momentum diffusivity being comparable to the ion thermal diffusivity and larger than the electron thermal diffusivity in neutral beam heated discharges. Perturbative experiments have studied nonlinear dependencies in the transport coefficients and examined the role of possible nonlocal phenomena. The underlying turbulence has been studied using microwave scattering, beam emission spectroscopy and microwave reflectometry over a much broader range in k perpendicular to than previously possible. Results indicate the existence of large-wavelength fluctuations correlated with enhanced transport.

日本語訳

TFTRプラズマ輸送研究のレビューを提示する。平行輸送および超熱イオンの閉じ込めは、理論によって比較的良好に記述されることがわかっている。しかし、熱プラズマの横断輸送は異常であり、運動量拡散係数がイオン熱拡散係数に匹敵し、中性粒子ビーム加熱放電における電子熱拡散係数よりも大きい。摂動実験により、輸送係数における非線形依存性が研究され、可能な非局所現象の役割が検討された。基礎となる乱流は、マイクロ波散乱、ビーム放射分光法、およびマイクロ波反射計を用いて、従来可能であったよりもはるかに広いk⊥(垂直波数)範囲にわたって研究された。結果は、増強された輸送と相関する大波長のゆらぎの存在を示している。

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