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Control of the motion of the ions in rotating magnetic field current drive: 2. Transient analysis

D C Visentin, W N Hugrass2003年Plasma Physics and Controlled FusionIF 2.2出版社

The time-dependent equations describing current drive in an infinitely long plasma cylinder by means of two counter-rotating magnetic fields are solved numerically neglecting the second and higher harmonics. The accessibility of steady state solutions where both rotating magnetic fields (RMFs) penetrate into the plasma much farther than the classical skin depth, the electrons being entrained by the (−) RMF and the ions by the (+) RMF, is demonstrated. The slip of the ions with respect to the (+) RMF is required to be initially negative, with a suitable radial profile. It is also shown that the use of two counter-rotating RMFs is possible only when the frequency of the (+) RMF is larger than the electron–ion momentum-transfer collision frequency (ω+>νei).

日本語訳

時間依存方程式は、2つの逆回転磁場による無限長プラズマ円筒内の電流駆動を記述するものであり、第2高調波およびそれ以上の高調波を無視して数値的に解かれる。両方の回転磁場(RMF)が古典的な表皮深さよりもはるかに深くプラズマ中に浸透し、電子が(−)RMFによって、イオンが(+)RMFによって引きずられる定常解の到達可能性が実証される。(+)RMFに対するイオンのすべりは、適切な動径分布を伴って、初期には負であることが要求される。また、2つの逆回転RMFの使用は、(+)RMFの周波数が電子-イオン運動量輸送衝突周波数よりも大きい場合(ω+>νei)にのみ可能であることも示されている。

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