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arXiv 1712.03099physics.plasm-ph
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产生磁场的新有限束等离子体不稳定性的证据

Evidence of new finite beam plasma instability for magnetic field generation

Amita Das, Atul Kumar, Chandrasekhar Shukla, Ratan Kumar Bera, Deepa Verma, Bhavesh Patel, Y. Hayashi, K. A. Tanaka, Amit D. Lad, G. R. Kumar, Predhiman Kaw

摘要:

我们证明了计算机模拟,激光等离子体实验,和分析理论,迄今未知的不稳定性激发在束等离子体系统具有有限的横向尺寸。这种不稳定性是产生磁场的原因,其尺度与横向束尺寸相当,横向束尺寸可以比电子趋肤深度尺度长得多。这一违反直觉的结果是由于辐射泄漏与有限的光束边界,这是不存在的,在传统的无限周期性系统中考虑在早期的模拟以及理论分析,并可能引发一个迄今流行的想法重新审视。

英文摘要:

We demonstrate by computer simulations, laser plasma experiments, and analytic theory that a hitherto unknown instability is excited in the beam plasma system with finite transverse size. This instability is responsible for the generation of magnetic fields at scales comparable to the transverse beam dimension which can be much longer than the electron skin depth scale. This counterintuitive result arises due to radiative leakage associated with finite beam boundaries which are absent in conventional infinite periodic systems considered in earlier simulations as well as theoretical analyses and may trigger a reexamination of a hitherto prevalent idea.

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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