The theory of laser self-resonant wake field excitation
The theory of laser self-resonant wake field excitation
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激光自谐振尾场激发理论
DOI：
10.1088/0031-8949/49/1/014
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发表时间：
1994
期刊：
影响因子：
2.9
通讯作者：
R. Ramazashvili
中科院分区：
文献类型：
--
作者：
N. Andreev;L. Gorbunov;V. Kirsanov;A. Pogosova;R. Ramazashvili
研究了短激光脉冲的三维演化过程。进行了考虑散射光对流的线性稳定性分析，并预测了电子等离子体频率下脉冲调制的发展。结果表明，提供脉冲相对论自聚焦所需的功率高于或接近临界值的激光脉冲在自洽脉冲演化过程中经历压缩和自调制，从而产生极强的等离子体波的共振激发。结果表明，对于适当的初始脉冲和等离子体参数，有可能在相当长的时间内获得极高强度的尾迹场，这为激光加速器概念提供了一个新的前景。研究了等离子体不均匀性和脉冲初始聚焦对所考虑的自共振等离子体波激励的影响。
The three-dimensional evolution of a short laser pulse is considered. The linear stability analysis that takes account of the scattered light convection and predicts a development of pulse modulation at the electron plasma frequency, is carried out. It is demonstrated that a laser pulse with a power above or close to the critical, which is required to provide a pulse relativistic self-focusing, undergoes compression and self-modulation in the course of self-consistent pulse evolution and, as a result, resonant excitation of an extremely strong plasma wave occurs. It is shown that for a properly taken initial pulse and plasma parameters it is possible to obtain a wake field of an extremely high intensity for a fairly long time to provide a new promising outlook for the laser accelerator concept. The influence of plasma inhomogeneity and pulse initial focusing on the considered self-resonant plasma wave excitation is studied.