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arXiv 1602.07892physics.plasm-ph
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冷等离子体中相对论强波包的相位混合

Phase Mixing of Relativistically Intense Longitudinal Wave Packets in a Cold Plasma

Arghya Mukherjee, Sudip Sengupta

摘要:

本文用解析和数值方法研究了均匀非磁化冷等离子体中相对论强波包的时空演化和破缺。导出了相位混合时间尺度与波包振幅和谱宽的一般关系式。结果与文献中已有的公式进行了比较。结果表明,相位混合时间尺度主要取决于波包的振幅和无量纲谱宽的相对大小。最后,我们利用基于Dawson片模型的数值模拟,从波包的振幅和谱宽两个方面验证了我们的结果。

英文摘要:

The spatio-temporal evolution and breaking of relativistically intense wave packets in a cold homogeneous unmagnetized plasma has been studied analytically and numerically. A general expression for phase mixing time scale as a function of amplitude of the wave packet and width of the spectrum has been derived. Results have been compared with the existing formulae in literature. It is shown that phase mixing time scale crucially depends on the relative magnitude of the amplitude and dimensionless spectral width of the wave packet. Finally we have verified our results with respect to both the amplitude of the wave packet and width of the spectral using numerical simulations based on Dawson Sheet Model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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