基于双焦方案的 Petawatt激光焦点热循环优化
光学
2026-05-21 v1 等离子体物理
摘要
实现高功率激光脉冲的衍射极限聚焦，以生成超高强度，对开发紧凑型激光驱动粒子加速器和探索强场量子电动力学至关重要。然而，对Petawatt（PW）激光脉冲焦点进行精准诊断和优化仍是一个重大挑战。本文提出了一种实验方法，利用双焦方案精确表征PW亚秒激光脉冲的强度分布和波前，并阐明其功率依赖的演化。进一步，通过本文提出的原位波前校正方法（称为HotLoop）优化了满功率下的焦点，实现了1 PW激光脉冲的0.80的Strehl比。因此，激光质子加速实验中的截止质子能 significantly 提升。该方法的成功强调了在超高强度激光-物质相互作用中进行原位高能波前校正的必要性。
引用
@article{arxiv.2605.20647,
title = {HotLoop Optimization of Petawatt Laser Focal Spot via a Twin-Focus Scheme},
author = {Qingfan Wu and Ying Gao and Minjian Wu and Jiarui Zhao and Shiyou Chen and Tianhao Liang and Haoran Chen and Tan Song and Zhongshuai Zhang and Zhangyi Wu and Shirui Xu and Ziyang Peng and Tianqi Xu and Zhuo Pan and Yujia Zhang and Qihang Han and Ke Chen and Chenghao Hua and Pengcheng Fan and Yuntian Xie and Yifei Shen and Shengxuan Xu and Liyong Ma and Yixing Geng and Chen Lin and Yanying Zhao and Xueqing Yan and Wenjun Ma},
journal= {arXiv preprint arXiv:2605.20647},
year = {2026}
}
备注
Accepted by Matter and Radiation at Extremes (MRE)