Charged Particle Acceleration by Lasers in Plasmas
Charged Particle Acceleration by Lasers in Plasmas
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DOI：
10.1063/1.2756773
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发表时间：
2007-07
期刊：
影响因子：
--
通讯作者：
C. Liu;V. Tripathi
中科院分区：
文献类型：
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作者：
C. Liu;V. Tripathi
重新审视等离子体中激光电子加速的几个物理过程。激光束可以驱动等离子体波，而等离子体波又可以加速谐振电子。如果这些等离子体波可以达到仅受波破碎限制的振幅，则等离子体波中相应的加速梯度是每等离子体趋肤深度的电子静止质量能量的数量级，通常约为每厘米GEV。这比传统的射频场梯度高出几个数量级，从而使高能物理研究以及医疗和其他应用所需的紧凑型加速器成为可能。啁啾短脉冲激光的强度超过相对论自聚焦的阈值，可以通过驱逐电子在其尾迹中产生离子泡。气泡边界处的电子涌向停滞点并在那里堆积。当堆达到临界尺寸时，这些电子被注入气泡中并被离子组合场加速......
Several physical processes of laser electron acceleration in plasmas are revisited. A laser beam can drive plasma waves which in turn can accelerate resonant electrons. If these plasma waves can reach amplitude limited only by wave breaking alone, then the corresponding accelerating gradient in the plasma wave is of the order of electron rest mass energy per plasma skin depth, typically about GEV per centimeter. This is several orders of magnitudes higher than the conventional RF field gradient, giving rise to the possibility of compact accelerators needed for high energy physics research as well as medical and other applications. The chirped short pulse laser, with intensity exceeding the threshold for relativistic self focusing, can generate ion bubble in its wake by expelling electrons. The electrons at the bubble boundary, surge toward the stagnation point and pile up there. As the pile acquires a critical size, these electrons are injected into the bubble and accelerated by the combined fields of ion...