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Contributions of the cross phase to the plasma transport

Chan-Yong An, Byunghoon Min, Chang-Bae Kim2017年Plasma Physics and Controlled FusionIF 2.2出版社

Numerical simulations of the resistive-drift plasma turbulence are performed in order to look into the effects of the E × B fluxes on the cross phase between the electric potential and the particle density. As the electrons become more adiabatic, it is found that the spectrum of the particle transport shifts away from the spectra of the energies. It is because the cross phases of the larger-scale () fluctuations, being the ion gyro-radius defined by the electron temperature instead of the ion temperature, where most energies reside come to be vanishingly small in correspondence to the level of adiabaticity. The cross phase in the scale is predominantly determined by the electron diamagnetic drift and the resistive current as the plasma is closer to be adiabatic. Advective parts of the E × B fluxes are found to reduce the cross phase and their effect is more pronounced as .

日本語訳

抵抗性ドリフトプラズマ乱流の数値シミュレーションを実施し、E×Bフラックスが電位と粒子密度の間のクロス位相に及ぼす影響を調べた。電子がより断熱的になるにつれて、粒子輸送のスペクトルがエネルギーのスペクトルからずれることが見出された。これは、より大きなスケールの()ゆらぎ、すなわちイオン温度ではなく電子温度によって定義されるイオンジャイロ半径のゆらぎのクロス位相が、エネルギーの大部分が存在する領域において、断熱性の程度に対応して極めて小さくなるためである。スケール()におけるクロス位相は、プラズマがより断熱的になるにつれて、主に電子反磁性ドリフトと抵抗性電流によって決定される。E×Bフラックスの対流部分はクロス位相を減少させることが見出され、その効果は()が大きくなるにつれてより顕著になる。

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