通过接近临界质量的有限目标有效激光等离子加速质子
Johannes Gebhard1, Peter Hilz2,3, Felix Balling1
1Ludwig-Maximilians-Universität München, Fakultät für Physik, Am Coulombwall 1, Garching 85748, Germany.
Physical review. E
|October 21, 2025
概括
孤立的微目标使得高性能激光驱动的粒子加速成为可能. 实验使用0.4 J激光能量从1微米球体中获得27 MeV质子,模拟预测100 MeV质子.
科学领域:
- 等离子体物理学的物理学
- 激光驱动的粒子加速器
- 核聚变是一种核聚变.
背景情况:
- 孤立的微型目标可以有效地限制激光能量.
- 这使得高性能激光驱动的质子和离子加速成为可能.
研究的目的:
- 为了研究悬浮的塑料微球的质子发射.
- 探索微目标在先进粒子加速方面的潜力.
主要方法:
- 来自1微米塑料微球的质子辐射的实验测量.
- 激光与等离子体相互作用的三维粒子在细胞 (PIC) 模拟.
主要成果:
- 在接近临界密度的微球上,观察到高达27 MeV的质子能量与0.4 J的激光能量.
- 在PIC的模拟中,研究人员发现了重力推进的"钻孔"和热电子加速机制.
- 模拟显示与实验数据有很好的一致性.
结论:
- 微型目标对于高能质子生成是有效的.
- 建议采用54 MeV/J^{1/2} 的缩放定律.
- 预计100 MeV质子具有4 J激光能量.
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