在一个由超强激光脉冲激光器启动的自组织光子碰撞器中产生和加速正子子子
K Sugimoto1,2, Y He3, N Iwata2,4
1Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikanecho, Toyonaka, Osaka 560-0043, Japan.
Physical review letters
|August 25, 2023
概括
研究人员发现了一种使用激光和等离子体创造和加速正子子的新方法. 这种基于线性Breit-Wheeler过程的方法可能会导致对正子束的新实验和应用.
科学领域:
- 等离子体物理学的物理学
- 高能物理 高能物理
- 激光与等离子体相互作用
背景情况:
- 对基础物理研究和技术应用而言,正子子生成和加速至关重要.
- 现有的生成正电子的方法往往需要复杂的设施或是低效的.
研究的目的:
- 在激光照射等离子体中发现一种简单的自我组织的正子子生成和加速机制.
- 为了研究等离子电场在正子加速中的作用.
- 为了能够对线性布雷特-惠勒过程进行实验观测.
主要方法:
- 使用一种能够通过光子对光子碰撞生成粒子对的首次动态模拟.
- 模拟一个接近临界的等离子体,被一个实验可用的强度 (10^22 W/cm^2) 的激光照射.
主要成果:
- 研究人员发现了一种新模式,激光照射等离子体自我组织,产生正子.
- 质子是通过线性布雷特-惠勒过程 (两个马射线创建一个电子-质子对) 生成的.
- 等离子体自身的电场将正子加速到超相对论能量,从而达到具有0.1 pC电荷和10°分歧角度的GeV正子束.
结论:
- 发现的模式为高效的正子子生成和加速提供了一条途径.
- 这项工作有助于对线性Breit-Wheeler过程进行实验验证.
- 这些发现为需要高质量的正子子束的应用开辟了道路.
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