Novel aspects of direct laser acceleration of relativistic electrons
Novel aspects of direct laser acceleration of relativistic electrons
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DOI：
10.1017/s0022377815000434
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发表时间：
2015-08-01
影响因子：
2.5
通讯作者：
Khudik, V. N.
中科院分区：
文献类型：
--
作者：
Arefiev, A. V.;Robinson, A. P. L.;Khudik, V. N.
我们研究了几个因素对激光脉冲加速电子的影响以及由此产生的电子能量增益。具体地说，我们考虑的作用：（1）静态纵向电场，（2）静态横向电场，（3）电子注入到激光脉冲，（4）静态纵向磁场。结果表明，所有这些因素导致，在一定条件下，从激光脉冲相当大的电子能量增益。与其他机制如韦克菲尔德加速不同，静电场在这种情况下并不直接将大量的能量传递给电子，而是减少电子和激光束之间的纵向失相，从而使电子从激光束中获得额外的能量。这里讨论的机制是相关的实验与下致密气体射流，以及涉及扩展的预等离子体的固体密度目标的实验。
We examine the impact of several factors on electron acceleration by a laser pulse and the resulting electron energy gain. Specifically, we consider the role played by: (1) static longitudinal electric field, (2) static transverse electric field, (3) electron injection into the laser pulse, and (4) static longitudinal magnetic field. It is shown that all of these factors lead, under certain conditions, to a considerable electron energy gain from the laser pulse. In contrast with other mechanisms such as wakefield acceleration, the static electric fields in this case do not directly transfer substantial energy to the electron. Instead, they reduce the longitudinal dephasing between the electron and the laser beam, which then allows the electron to gain extra energy from the beam. The mechanisms discussed here are relevant to experiments with under-dense gas jets, as well as to experiments with solid-density targets involving an extended pre-plasma.