Ionization injection in a laser wakefield accelerator subject to a transverse magnetic field

Ionization injection in a laser wakefield accelerator subject to a transverse magnetic field
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受到横向磁场影响的激光尾场加速器中的电离注入

DOI:
10.1088/1367-2630/aac926
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发表时间:
2018-02
影响因子:
3.3
通讯作者:
Zhang J
Zhang J
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhao Q;Weng S M;Sheng Z M;Chen M;Zhang G B;Mori W B;Hidding B;Jaroszynski D A;Zhang J

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通过理论分析和粒子模拟研究了外加横向磁场对激光尾波场加速器(LWFA)中电子电离注入的影响。在几十特斯拉磁场的作用下,电子捕获条件和尾场结构都发生了显著的变化,从而使注入发生在更短的距离和更快的速度。此外,由于注入电子的本征梯形纵向电荷密度分布,束流负载得到了补偿。非线性电离注入和随之而来的束流加载补偿导致电子束在磁场中的能散减小,电荷和最终峰值能量增加。
The effect of an external transverse magnetic field on ionization injection of electrons in a laser wakefield accelerator (LWFA) is investigated by theoretical analysis and particle-in-cell simulations. On application of a few tens of Tesla magnetic field, both the electron trapping condition and the wakefield structure changes significantly such that injection occurs over a shorter distance and at an enhanced rate. Furthermore, beam loading is compensated for, as a result of the intrinsic trapezoidal-shaped longitudinal charge density profile of injected electrons. The nonlinear ionization injection and consequent compensation of beam loading lead to a reduction in the energy spread and an enhancement of both the charge and final peak energy of the electron beam from a LWFA immersed in the magnetic field.
DOI: 10.1103/physrevlett.76.2073
发表时间: 1996-03
影响因子: 8.6
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