Matter and Radiation at Extremes (Mar 2025)
Diagnosis of focal spots at relativistic intensity utilizing coherent radiation from laser-driven flying electron sheets
- Shirui Xu,
- Zhuo Pan,
- Ying Gao,
- Jiarui Zhao,
- Shiyou Chen,
- Zhusong Mei,
- Xun Chen,
- Ziyang Peng,
- Xuan Liu,
- Yulan Liang,
- Tianqi Xu,
- Tan Song,
- Qingfan Wu,
- Yujia Zhang,
- Zhipeng Liu,
- Zihao Zhang,
- Haoran Chen,
- Qihang Han,
- Jundong Shen,
- Chenghao Hua,
- Kun Zhu,
- Yanying Zhao,
- Chen Lin,
- Xueqing Yan,
- Wenjun Ma
Affiliations
- Shirui Xu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Zhuo Pan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Ying Gao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Jiarui Zhao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Shiyou Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Zhusong Mei
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Xun Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Ziyang Peng
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Xuan Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Yulan Liang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Tianqi Xu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Tan Song
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Qingfan Wu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Yujia Zhang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Zhipeng Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Zihao Zhang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Haoran Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Qihang Han
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Jundong Shen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Chenghao Hua
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Kun Zhu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Yanying Zhao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Chen Lin
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Xueqing Yan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Wenjun Ma
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- DOI
- https://doi.org/10.1063/5.0255211
- Journal volume & issue
-
Vol. 10,
no. 2
pp. 027202 – 027202-8
Abstract
Experimental validation of laser intensity is particularly important for the study of fundamental physics at extremely high intensities. However, reliable diagnosis of the focal spot and peak intensity faces huge challenges. In this work, we demonstrate for the first time that the coherent radiation farfield patterns from laser–foil interactions can serve as an in situ, real-time, and easy-to-implement diagnostic for an ultraintense laser focus. The laser-driven electron sheets, curved by the spatially varying laser field and leaving the targets at nearly the speed of light, produce doughnut-shaped patterns depending on the shapes of the focal spot and the absolute laser intensities. Assisted by particle-in-cell simulations, we can achieve measurements of the intensity and the focal spot, and provide immediate feedback to optimize the focal spots for extremely high intensity.
