在米尺度多GeV激光唤醒场加速器中引导模式演变和电离注入.
J E Shrock1, E Rockafellow1, B Miao1
1Institute for Research in Electronics and Applied Physics and Department of Physics, <a href="https://ror.org/047s2c258">University of Maryland</a>, College Park, Maryland 20742, USA.
Physical review letters
|August 9, 2024
概括
激光唤醒场电子加速器在等离子波导中表现出一种新的非线性传播模式. 这种模式增强了电子注入,并产生具有可调节能光谱的多GeV电子束.
科学领域:
- 等离子体物理学的物理学
- 加速器物理学的物理学
- 非线性光学是非线性光学.
背景情况:
- 激光唤醒场加速 (LWFA) 是小型电子加速器的一个有前途的技术.
- 在LWFA中控制电子束特性仍然是一个挑战.
- 等离子波导被用来指导强烈的激光脉冲在很长的距离.
研究的目的:
- 为了研究强烈的激光脉冲在米尺度等离子体波导中的非线性传播动态.
- 了解激光-等离子相互作用对电子注入和加速的影响.
- 为了描述由此产生的电子束特性.
主要方法:
- 在米尺度,低密度的水力动力等离子波导中对多GeV激光唤醒场电子加速器的实验研究.
- 使用连续和局部杂的气体喷射来产生等离子体.
- 驱动激光脉冲演变和电离注射的三阶段模型的开发.
主要成果:
- 发现了一种新的非线性传播模式,其主导模式是沉重运动修饰等离子体通道中的持续模式跳动.
- 新兴模式的敲击导致轴向调节的电离注射.
- 根据气体兴奋剂,生成多GeV电子能量光谱,具有多个近似能量峰值或单个峰值,能量分布<10%,这取决于气体兴奋剂.
结论:
- 等离子体波导中的持续模式跳动是控制LWFA性能的一个关键因素.
- 开发的三阶段模型准确地描述了观察到的现象和实验结果.
- 这项工作为在LWFA系统中加强对电子束生成的控制铺平了道路.
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