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A wave-particle interaction model for tail ion acceleration in reversed field pinch plasmas

S Costa, R Paccagnella, F Pegoraro, M Viterbo1999年Plasma Physics and Controlled FusionIF 2.2出版社

In the reversed field pinch plasmas produced by the reversed field experiment (RFX), neutral particle measurements reveal the presence in the radial direction of a small population of non-thermal energetic ions (E = 103 eV to 8 × 103 eV). In this work supra-thermal electrons at the plasma edge are considered to be the free-energy source for the ion acceleration. Fast electrons, moving in the same direction of the main magnetic field, excite an ~pi electrostatic wave which gives energy to the ions which are accelerated in the direction perpendicular to the local equilibrium magnetic field. The theoretical predictions for the neutral particle fluxes are in agreement with the experimental measurements. Moreover, a correlation between the experimental fast-ion and fast-electron energy densities has been found.

日本語訳

反転磁場ピンチ実験(RFX)で生成された反転磁場ピンチプラズマにおいて、中性粒子測定により、径方向に少数の非熱的高エネルギーイオン(E = 10³ eV から 8 × 10³ eV)の存在が明らかにされた。本研究では、プラズマ端部の超熱電子がイオン加速の自由エネルギー源であると考えられる。高速電子は、主磁場と同方向に移動しながら、局所平衡磁場に垂直な方向に加速されるイオンにエネルギーを与える約πの静電波を励起する。中性粒子フラックスに関する理論的予測は、実験測定と一致する。さらに、高速イオンと高速電子のエネルギー密度の間に相関関係が見出された。

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Reversed field pinchPinch plasmaIon acceleration
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