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arXiv 1601.02747physics.plasm-ph
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冷等离子体中相对论电子束驱动的纵向尾波破缺

Relativistic electron beam driven longitudinal wake-wave breaking in a cold plasma

Ratan Kumar Bera, Arghya Mukherjee, Sudip Sengupta, Amita Das

摘要:

利用一维流体模拟技术研究了均匀冷等离子体中相对论电子束驱动尾流场的时空演化。观察到尾波逐渐发展并最终破裂,在密度分布中表现出尖锐的尖峰,在电场分布中表现出类似锯齿的特征[1]。本文表明,激发尾场是一种双曲Akhiezer-Polovin模[2],它的陡化(破缺)可以用相对论质量变化效应引起的该模的相位混合来理解。进一步研究了相混合时间(破碎时间)作为束流密度和束流速度的函数,发现它遵循文献[1]中提出的公知的标度。[3]。

英文摘要:

Space-time evolution of relativistic electron beam driven wake-field in a cold, homogeneous plasma, is studied using 1D-fluid simulation techniques. It is observed that the wake wave gradu- ally evolves and eventually breaks, exhibiting sharp spikes in the density profile and sawtooth like features in the electric field profile [1]. It is shown here that the excited wakefield is a longitudi- nal Akhiezer-Polovin mode [2] and its steepening (breaking) can be understood in terms of phase mixing of this mode, which arises because of relativistic mass variation effects. Further the phase mixing time (breaking time) is studied as a function of beam density and beam velocity and is found to follow the well known scaling presented in ref.[3].

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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