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Alfvén heating of a plasma with an axial homogeneous current

A.G. Elfimov, S.N. Lozovskij, V.V. Dorokhov Jr1984年被引用 4Nuclear FusionIF 3出版社

The problem of RF field excitation and absorption in an inhomogeneous plasma cylinder with axial uniform direct current is investigated. The RF power absorption is connected with the conversion of the incident wave generated by a helical antenna in the slow Alfvén (kinetic) mode in the vicinity of the point of 'local Alfvén resonance' r = rA. Effects of the plasma gyrotropic properties are included. Analytical expressions for RF field amplitudes and absorbed RF power, W, are obtained in terms of series expansions. If the axial current is large enough, sharp resonance curves, W(rA), are possible, with the maxima near the plasma centre. These maxima virtually coincide with the kink mode frequencies of the plasma column.

日本語訳

軸方向に一様な直流電流を有する不均一プラズマ円柱におけるRF場の励起と吸収について調査する。RF電力吸収は、らせんアンテナによって生成された入射波が、『局所アルフヴェン共鳴』r = rAの近傍において、遅いアルフヴェン(運動論的)モードへ変換されることと関連している。プラズマのジャイロトロピック特性の影響が考慮されている。RF場の振幅と吸収RF電力Wに対する解析的表現が、級数展開の形で得られる。軸方向電流が十分に大きい場合、鋭い共鳴曲線W(rA)が可能となり、その極大値はプラズマ柱の中心付近に現れる。これらの極大値は、プラズマ柱のキンクモード周波数と実質的に一致する。

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Alfvén wave
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