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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 |
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| Cite this article: |
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HE Hui-Yong, CHEN Liang-Xu, LI Jiang-Fan 2008 Chin. Phys. Lett. 25 3511-3514 |
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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.
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| Keywords:
94.20.Rr
52.35.Hr
94.30.Lr
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Received: 17 April 2008
Published: 29 August 2008
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| PACS: |
94.20.Rr
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52.35.Hr
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(Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid))
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94.30.Lr
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(Magnetic storms, substorms)
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