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The SLEGS beamline of SSRF

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Abstract

The Shanghai Laser Electron Gamma Source (SLEGS, located in BL03SSID) beamline at the Shanghai Synchrotron Radiation Facility (SSRF) is a Laser Compton Scattering (LCS) gamma source used for the investigation of nuclear structure, which is in extensive demand in fields such as nuclear astrophysics, nuclear cluster structure, polarization physics, and nuclear energy. The beamline is based on the inverse Compton scattering of 10640 nm photons on 3.5 GeV electrons and a gamma source with variable energy by changing the scattering angle from 20\(^\circ\) to 160\(^\circ\). \(\gamma\) rays of 0.25\(-\)21.1 MeV can be extracted by the scheme consisting of the interaction chamber, coarse collimator, fine collimator, and attenuator. The maximum photon flux for 180\(^\circ\) is approximately \(10^{7}\) photons/s at the target at 21.7 MeV, with a 3-mm-diameter beam. The beamline was equipped with four types of spectrometers for experiments in (\(\gamma\),\(\gamma\)’), (\(\gamma\),n), (\(\gamma\),p), and (\(\gamma,\!\alpha\)). At present, Nuclear Resonance Fluorescence (NRF) spectrometry, Flat-Efficiency neutron Detector (FED) spectrometry, neutron Time-Of-Flight (TOF) spectrometry, and Light-Charged Particle (LCP) spectrometry methods have been developed.

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Data availibility

The data that support the findings of this study are openly available in Science Data Bank at https://cstr.cn/31253.11.sciencedb.07246 and https://www.doi.org/10.57760/sciencedb.07246.

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Acknowledgements

We acknowledge the beamline engineers from the SSRF Optics and Control Department and the Mechanics and Vacuum Department for their hard work on beamline design, construction, and online testing. We are grateful to Zhen-Tang Zhao, Ren-Zhong Tai, Jie Wang, Yu-Ying Huang and Song Xue, who discussed the detector techniques and the beamline design. We thank Researcher Gui-Lin Zhang for his assistance with detector testing. We thank Researcher Gen-Ming ** of the Institute of Modern Physics for his guidance on the experimental methods. We thank Professor Wan-** the gamma beam spot measurement device. We appreciate the support of Bing Guo, Chuang-Ye He, Fu-Long Liu, Zhi-Qiang Wang, Yi-Na Liu, and Ming-Zhe Song from the Chinese Academy of Atomic Energy Sciences in calibrating the LaBr3 detectors. We would like to express our gratitude to Professor Hiroaki Utsunomiya for his guidance on gamma spectroscopy measurements. The authors are grateful to Wen-Qing Shen and Yu-Gang Ma for their guidance in constructing the SLEGS beamline. This study was supported by the Shanghai Light Source Line Station Project.

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Authors and Affiliations

  1. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China

    Long-**ang Liu, Hong-Wei Wang, Gong-Tao Fan, Hang-Hua Xu, Yue Zhang, Zi-Rui Hao & Ai-Guo Li

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  1. Long-**ang Liu
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  2. Hong-Wei Wang
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  3. Gong-Tao Fan
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  4. Hang-Hua Xu
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  5. Yue Zhang
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  7. Ai-Guo Li
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Long-**ang Liu, Hong-Wei Wang, Gong-Tao Fan, Hang-Hua Xu, Yue Zhang, and Zi-Rui Hao. The first draft of the manuscript was written by Long-**ang Liu and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Hong-Wei Wang, Gong-Tao Fan or Ai-Guo Li.

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The authors declare that they have no Conflict of interest.

Additional information

This work was supported by the Shanghai Light Source Line Station Project.

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Liu, LX., Wang, HW., Fan, GT. et al. The SLEGS beamline of SSRF. NUCL SCI TECH 35, 111 (2024). https://doi.org/10.1007/s41365-024-01469-3

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