Two-dimensional monitoring of a laser– solid x-ray source spot via penumbral coded aperture imaging technique

• Date:2025-04-30
• Title of Paper:Two-dimensional monitoring of a laser– solid x-ray source spot via penumbral coded aperture imaging technique
• Journal:Review of Scientific Instruments
• Summary:The uncertainties of spot size and position need to be clarified for x-ray sources as they can affect the detecting precision of the x-ray probe
  beam in applications such as radiography. In particular, for laser-driven x-ray sources, they would be more significant as they influence the
  inevitable fluctuation of the driving laser pulses. Here, we have employed the penumberal coded aperture imaging technique to diagnose the
  two-dimensional spatial distribution of an x-ray emission source spot generated from a Cu solid target irradiated by an intense laser pulse.
  Taking advantage of the high detection efficiency and high spatial resolution of this technique, the x-ray source spot is characterized with
  a relative error of ∼5% in the full width at half maximum of the intensity profile in a single-shot mode for general laser parameters, which
  makes it possible to reveal the information of the unfixed spot size and position precisely. Our results show the necessity and feasibility of
  monitoring the spot of these novel laser-driven x-ray sources via the penumbral coded aperture imaging technique.
• Co-author:Xue-Jie Bai, Yi-Hong Yan, Hong-Yi Lei, Fang-Zheng Sun, Tian-Ze Wang, Chang-Qing Zhu, Jun-Hao Tan, Guang Hu, Yan-Fei Li, Jing-Long Ma, Guo-Qian Liao, Zhe Zhang, Hua-Si Hu, and Yu-Tong Li
• Volume:93
• Page Number:043104
• Translation or Not:No
• Date of Publication:2022-04-19