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arXiv 1611.09596physics.plasm-phnlin.CDphysics.class-ph
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相位混合对朗道不稳定性和阻尼的重要性

Phase mixing importance for both Landau instability and damping

Daniel Santos, Yves Elskens

摘要:

利用哈密顿方法讨论了$N$近共振电子与单朗缪尔波相互作用系统的等离子体自洽动力学。与弗拉索夫描述的连接重新通过数值计算的范坎彭一样的本征频率的线性化动力学的多个自由度。这两个指数状增长以及阻尼的朗缪尔波出现从光束模式之间的相位混合效应,揭示了意想不到的相似性之间的稳定和不稳定的制度。

英文摘要:

We discuss the self-consistent dynamics of plasmas by means of hamiltonian formalism for a system of $N$ near-resonant electrons interacting with a single Langmuir wave. The connection with the Vlasov description is revisited through the numerical calculation of the van Kampen-like eigenfrequencies of the linearized dynamics for many degrees of freedom. Both the exponential-like growth as well as damping of the Langmuir wave are shown to emerge from a phase mixing effect among beam modes, revealing unexpected similarities between the stable and unstable regimes.

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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