High-brightness betatron X-ray source driven by the SULF-1 PW laser

作者：Hong Zhang, Zhigang Deng, Hai Jiang, Shaoyi Wang, Jianmeng Wei, Yanjie Ge, Genbai Chu, Xizhuan Chen, Hao Wang, Yonghong Yan, Ke Feng, Kangnan Jiang, Runshu Hu, Fang Tan, Guangjuan Zeng, Hang Guo, Xintao Yang, Jiayi Qian, Jiacheng Zhu, Zongxin Zhang, Y. Xu, Yuxin Leng, Weimin Zhou, Song Li, Wentao Wang, Ruxin Li Ruxin Li · 发表于：High Power Laser Science and Engineering · 年份：2025 · DOI：10.1017/hpl.2025.17 · 被引用次数：6 · 研究领域：Laser Design and Applications、Advanced X-ray Imaging Techniques、Diamond and Carbon-based Materials Research

Abstract The betatron radiation source features a micrometer-scale source size, a femtosecond-scale pulse duration, milliradian-level divergence angles and a broad spectrum exceeding tens of keV. It is conducive to the high-contrast imaging of minute structures and for investigating interdisciplinary ultrafast processes. In this study, we present a betatron X-ray source derived from a high-charge, high-energy electron beam through a laser wakefield accelerator driven by the 1 PW/0.1 Hz laser system at the Shanghai Superintense Ultrafast Laser Facility (SULF). The critical energy of the betatron X-ray source is 22 ± 5 keV. The maximum X-ray flux reaches up to 4 × 10 9 photons for each shot in the spectral range of 5–30 keV. Correspondingly, the experiment demonstrates a peak brightness of 1.0 × 10 23 photons·s −1 ·mm −2 ·mrad −2 ·0.1%BW −1 , comparable to those demonstrated by third-generation synchrotron light sources. In addition, the imaging capability of the betatron X-ray source is validated. This study lays the foundation for future imaging applications.