数字全息干扰测量用于诊断激光产生的无碰撞冲击的密度特征
Hua-Chong Si1, Hui-Bo Tang2,3,4, Wei Liu1
1School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China.
The Review of scientific instruments
|December 8, 2023
概括
一种新的数字全息干扰测量技术准确地测量了激光产生的无碰撞冲击中的电子密度. 这种方法克服了不连续冲击表面的挑战,提供了详细的等离子体密度概况.
科学领域:
- 等离子体物理学的物理学
- 光学诊断器 视觉诊断器 视觉诊断器
- 激光引起的现象 激光引起的现象
背景情况:
- 无碰撞冲击在天体物理学和实验室等离子体中至关重要.
- 精确测量电子密度概况对于理解冲击动态至关重要.
- 传统的干扰测量方法与不连续的等离子体接口作斗争.
研究的目的:
- 开发和验证数字全息干扰测量技术,用于测量激光产生的无碰撞冲击中的电子密度.
- 解决常规阶段解封算法在不连续冲击结构上应用时的局限性.
- 为了实现实验室等离子体的高分辨率电子密度分析.
主要方法:
- 基于弗雷内尔双晶体的数字全息干扰测量系统的开发.
- 应用最小平方法用于相提取,以克服边缘不连续性.
- 使用福里埃变换方法来解决初始阶段问题.
- 与暗场施莱伦方法和冲击跳跃条件的比较.
主要成果:
- 成功获得了用于无碰撞冲击的细电子密度配置文件.
- 在直线集成密度区域中获得了3.38 × 10^16 cm^-2的密度分辨率,大约为10^18 cm^-2.
- 展示了全息测量,schlieren成像和理论预测之间的一致性.
- 使用合成全息图验证了算法的稳定性,即使有部分光折射.
结论:
- 开发的数字全息干扰测量方法是有效的诊断电子密度在复杂的等离子体结构,如无碰撞冲击.
- 最小平方相提取算法成功处理边缘不连续性,使得精确的等离子体重建.
- 这种技术为推进激光-等离子体相互作用和冲击物理学的研究提供了宝贵的工具.
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