在激光-等离子加速中定制电子束质量:在可变等离子密度几何学下对贝塞尔-高斯和高斯激光配置进行比较研究
R Khooniki1, R Fallah2, S M Khorashadizadeh1
1Department of Physics, University of Birjand, Birjand, Iran.
Scientific reports
|February 12, 2026
概括
在激光唤醒场加速 (LWFA) 中调整等离子体密度和激光脉冲形状来控制电子注入. 研究人员发现,等离子体密度高原的长度是优化LWFA电子束电荷和能量的一个关键参数.
科学领域:
- 等离子体物理学的物理学
- 粒子加速 粒子加速
- 激光与等离子体相互作用
背景情况:
- 在激光唤醒场加速 (LWFA) 中控制电子注入和光束质量对于先进的应用至关重要.
- 这需要对驱动激光结构和等离子体密度配置文件进行协调操作.
研究的目的:
- 系统地研究如何纵向等离子体密度调整与激光脉冲成型相互作用,以调节电子注入和最终束特性.
- 在相同的总激光能量条件下比较高斯式 (G) 和零级贝塞尔-高斯式 (BG) 激光脉冲.
主要方法:
- 进行了一项系统的粒子在细胞 (PIC) 研究.
- 模拟使用了具有不同高密度平原长度的多段血密度配置文件 ([公式:见文本]).
- 将高斯式和零级贝塞尔-高斯式激光脉冲进行了比较.
主要成果:
- 贝塞尔-高斯脉冲促进扩展注入,导致更高的被困电荷,但增加了光束负载,限制了峰值能量.
- 高斯脉冲有利于局部注入,电荷较低,但峰值能量更高,光谱质量更好,特别是没有密度平原.
- [公式:见文本]被确定为调整注入和平衡电荷-能量权衡的强有力的控制参数.
结论:
- 纵向等离子体密度量身定制是优化LWFA中的电子束参数的实用方法.
- 适度的激光脉冲塑造和等离子体密度量身定制为光束优化提供了互补的途径.
- 发射剂的演变是由注射时间和定位决定的,而不是从根本上由激光脉冲形状差异决定的.
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