Characteristics of Wave--Particle Interaction in a Hydrogen Plasma
HE Hui-Yong1,2, CHEN Liang-Xu1, LI Jiang-Fan1
1School of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 4100762State Key Laboratory of Space Weather, PO Box 8701, Beijing 100080
Characteristics of Wave--Particle Interaction in a Hydrogen Plasma
HE Hui-Yong1,2, CHEN Liang-Xu1, LI Jiang-Fan1
1School of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 4100762State Key Laboratory of Space Weather, PO Box 8701, Beijing 100080
摘要We study the characteristics of cyclotron wave--particle interaction in a typical hydrogen plasma. The numerical calculations of minimum resonant energy Emin, resonant wave frequency ω$, and pitch angle diffusion coefficient Dαα for interactions between R-mode/L-mode and electrons/protons are presented. It is found that Emin decreases with ω for R-mode/electron, L-mode/proton and L-mode/electron interactions, but increase with ω for R-mode/proton interaction. It is shown that both R-mode and L-mode waves can efficiently scatter energetic (10keV~100keV) electrons and protons and cause precipitation loss at L=4, indicating that perhaps wave--particle interaction is a serious candidate for the ring current decay.
Abstract：We study the characteristics of cyclotron wave--particle interaction in a typical hydrogen plasma. The numerical calculations of minimum resonant energy Emin, resonant wave frequency ω$, and pitch angle diffusion coefficient Dαα for interactions between R-mode/L-mode and electrons/protons are presented. It is found that Emin decreases with ω for R-mode/electron, L-mode/proton and L-mode/electron interactions, but increase with ω for R-mode/proton interaction. It is shown that both R-mode and L-mode waves can efficiently scatter energetic (10keV~100keV) electrons and protons and cause precipitation loss at L=4, indicating that perhaps wave--particle interaction is a serious candidate for the ring current decay.
HE Hui-Yong;CHEN Liang-Xu;LI Jiang-Fan. Characteristics of Wave--Particle Interaction in a Hydrogen Plasma[J]. 中国物理快报, 2008, 25(9): 3511-3514.
HE Hui-Yong, CHEN Liang-Xu, LI Jiang-Fan. Characteristics of Wave--Particle Interaction in a Hydrogen Plasma. Chin. Phys. Lett., 2008, 25(9): 3511-3514.
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