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基于激光驱动的无碰撞冲击加速的高流量中子子发生器

Y L Yao¹, S K He², Z Lei¹

¹Center for Applied Physics and Technology, HEDPS and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.

Physical review letters

|July 28, 2023

概括

使用无碰撞冲击加速 (CSA) 的新型激光驱动中子发生器产生了比以前的方法更高的中子产量. 这种紧的高流量源为中子生成应用提供了显著的优势.

科学领域:

等离子体物理学的物理学
核聚变是一种核聚变.
粒子加速粒子加速

背景情况:

传统的中子源往往面临着流量和纯度的限制.
激光驱动加速技术为紧中子生成提供了新的途径.
无碰撞冲击加速 (CSA) 为目标正常加速 (TNSA) 提供了替代方案.

研究的目的:

提出和实验验证一种新的紧型高流量中子发生器.
研究CSA与TNSA在子加速和中子产生方面的优势.
用CSA方法证明中子产量的显著增加.

主要方法:

使用投手-捕手配置进行激光驱动的无碰撞冲击加速.
实验测量了子能量光谱和前置中子流量.
采用自我一致的模拟来验证实验结果,并预测在更高激光强度的性能.

主要成果:

观察到Deuteron能量谱 (26 MeV) 中一个特有的CSA高原.
从一个 LiF 捕获目标获得了 6.6×10^7 n/sr 的前向中子流.
与TNSA方法相比,在1019W/cm2激光强度下显示出一个数量级更高的中子产量.

结论:

CSA是一种高效的机制,用于产生高流量,高能量子,从而提高中子产量.
拟议的基于CSA的中子发生器显示了对紧,高性能中子源的巨大潜力.
模拟预测在更高激光强度 (10^21 W/cm^2) 下,可实现的中子产量高达5×10^10 n/sr.

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