Simulation study of an LWFA-based electron injector for AWAKE Run 2

Simulation study of an LWFA-based electron injector for AWAKE Run 2
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基于 LWFA 的 AWAKE Run 2 电子注入器的仿真研究

DOI:
10.1016/j.nima.2018.02.005
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发表时间:
2018
期刊:
Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Williamson B
Williamson B
中科院分区:
--
文献类型:
--
作者:
Williamson B

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AWAKE实验旨在证明质子驱动等离子体波加速过程中注入电子束质量的保持。在给定可用于束线的空间的情况下,正确加载韦克菲尔德所需的短聚束持续时间对于满足当前电子注入器系统是具有挑战性的。一个LWFA容易提供短时间的电子束与足够的电荷从一个紧凑的设计,并提供了一个可扩展的选择,为未来的电子加速实验在AWAKE。冲击波前注入LWFA的模拟表明,43 TW激光系统将足以产生超过100兆电子伏的能量范围内所需的电荷。LWFA光束通常具有高峰电流和大的发散在退出其原生等离子体,和聚束参数的优化注入到质子驱动的尾场之前是必需的。紧凑的光束传输的解决方案进行了讨论。
The AWAKE experiment aims to demonstrate preservation of injected electron beam quality during acceleration in proton-driven plasma waves. The short bunch duration required to correctly load the wakefield is challenging to meet with the current electron injector system, given the space available to the beamline. An LWFA readily provides short-duration electron beams with sufficient charge from a compact design, and provides a scalable option for future electron acceleration experiments at AWAKE. Simulations of a shock-front injected LWFA demonstrate a 43 TW laser system would be sufficient to produce the required charge over a range of energies beyond 100 MeV. LWFA beams typically have high peak current and large divergence on exiting their native plasmas, and optimisation of bunch parameters before injection into the proton-driven wakefields is required. Compact beam transport solutions are discussed.
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