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激光质子加速从一个接近临界的爆炸气体目标

Omri Seemann¹, Yang Wan², Sheroy Tata¹

¹Department of Physics of Complex Systems, <a href="https://ror.org/0316ej306">Weizmann Institute of Science</a>, Rehovot 7610001, Israel.

Physical review letters

|July 29, 2024

概括

研究人员开发了一种使用气体目标激光驱动质子加速的新方法. 这种技术可以实现具有精确梯度的临界等离子体密度,使稳定,单能质子束用于先进的应用.

科学领域:

等离子体物理学的物理学
激光诱导的加速
高能粒子束 (High-Energy Particle Beams) 是一种高能粒子束.

背景情况:

高效的激光-等离子能量合对于激光驱动的质子加速至关重要.
在高重复率的应用中,在气体目标中实现微米级梯度的临界等离子体密度是具有挑战性的.

研究的目的:

提出一种用于控制气体目标密度配置文件的新方案,以加强激光-等离子体相互作用.
通过使用有形气体目标,证明稳定高效的激光驱动质子加速.

主要方法:

使用光学激光脉冲横向塑造气体目标并产生碰撞的冲击波.
在平面和圆柱体几何形状的实验中,使用1.5 J的目标激光脉冲.

主要成果:

证明了稳定的质子加速,单能分布高达5 MeV.
获得的粒子数量超过10^8 Sr^{-1} MeV^{-1}.
成功完成了200次连续射击,证明了这种方法的稳定性.

结论:

这种新方案有效地满足了激光驱动的质子加速的严格气体目标密度要求.
证明的稳定性和效率为多倍瓦的激光系统和先进应用铺平了道路.

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