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Particle Simulations for Electron Beam-Plasma Interactions |
| ZHOU Guo-cheng;LI Yang;CAO Jin-bin;WANG Xue-yi |
| Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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ZHOU Guo-cheng, LI Yang, CAO Jin-bin et al 1998 Chin. Phys. Lett. 15 895-897 |
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Abstract The computer simulations of high-frequency instabilities excited by the high density electron beam and their nonlinear effect are presented. One-dimensional electromagnetic particle simulations are performed with different values of the electron beam-to-plasma density ratio. The results show that for the high electron beam-to-background plasma density ratio, all the Langmuir waves and two electromagnetic waves with left-hand and right-hand circular polarizations (i.e., the “L-O mode” and the “R-X mode”) propagating parallel to the magnetic field can be generated and the maximum values of wave electric fields are nearly the same. The electron beam and background plasma are diffused and a part of energetic background electrons are obviously accelerated by the wave-particle interactions. The heating of the beam and background plasma is mainly due to the electrostatic (Langmuir) wave-particle interactions, but the accelerations of a part of energetic background electrons may be mainly due to the electromagnetic wave-particle interactions.
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| Keywords:
52.40.Mj
52.35.Fp
52.35.Hr
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Published: 01 December 1998
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| PACS: |
52.40.Mj
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(Particle beam interactions in plasmas)
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52.35.Fp
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(Electrostatic waves and oscillations (e.g., ion-acoustic waves))
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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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