Effect of Guiding Magnetic Field on Weibel Instability |
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作者姓名: | 李纪伟 裴文兵 |
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作者单位: | [1]GraduateSchool,ChinaAcademyofEngineeringPhysics,POBox2101,Beijing100088 [2]InstituteofAppliedPhysicsandComputationalMathematics,POBox8009,Beijing100088 |
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摘 要: | We derive a linear dispersion relation in the presence of a constant uniform guiding magnetic field parallel to the beam velocity direction, which shows a strong background magnetic field suppresses or even stabilizes the Weibel instability produced by two counter streams in electron-ion plasmas. The simulation results are in good agreement with the analytical ones. Also observed in the simulations are the suppression of electrostatic field, a higher level of saturation of self-generated magnetic field, and the apparent difference in phase space compared with those in the absence of guiding magnetic field.
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关 键 词: | 导象磁场 不稳定性 差量关系 电离子 仿真技术 |
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