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Langmuir condensation by spontaneous scattering off electrons in two dimensions

L F Ziebell, P H Yoon, R Gaelzer, J Pavan2012年Plasma Physics and Controlled FusionIF 2.2出版社

In a pair of recent papers (Ziebell et al 2008 Phys. Plasmas15 032303, 2008 Plasma Phys. Control. Fusion50 085011) it was shown, within the context of weak turbulence theory, that the Langmuir turbulence generated by the bump-in-tail instability does not lead to Langmuir condensation (or accumulation of wave energy and momentum in the long-wavelength regime) in two dimensions. The present analysis finds that it is important to include the spontaneous scattering off Langmuir turbulence of the electrons, which is ignored in the customary literature when compared with a similar process involving ions, in order to recover the condensation of Langmuir waves in two dimensions.

日本語訳

最近の2つの論文(Ziebell et al 2008 Phys. Plasmas15 032303, 2008 Plasma Phys. Control. Fusion50 085011)において、弱乱流理論の文脈で、バンプ・イン・テール不安定性によって生成されたラングミュア乱流が、2次元においてラングミュア凝縮(すなわち、長波長領域における波動エネルギーと運動量の蓄積)を引き起こさないことが示された。本解析では、2次元におけるラングミュア波の凝縮を再現するためには、イオンが関与する類似の過程と比較した場合に従来の文献では無視されている、ラングミュア乱流による電子の自発散乱を含めることが重要であることが見出された。

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