Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (12): 120201-120201.doi: 10.11889/j.0253-3219.2019.hjs.42.120201


Study on polarized γ beam properties of a new LCS light source based on SXFEL

Junwen WANG1,3,4,Gongtao FAN1,2(),Hongwei WANG1,2,3(),Yugang MA1,3,4(),Guilin ZHANG1,Longxiang LIU1,2,Yue ZHANG1,3,Xinrong HU1,3,Xinxiang LI1,3,Zirui HAO1,3   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
    4. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
  • Received:2019-08-21 Revised:2019-10-06 Online:2019-12-10 Published:2019-12-18
  • Contact: Gongtao FAN,Hongwei WANG,Yugang MA;;
  • About author:WANG Junwen, male, born in 1995, graduated from Sichuan Normal University in 2017, master student of ShanghaiTech University, major in particle physics and nuclear physics
  • Supported by:
    National Natural Science Foundation of China(11875311);Shanghai Light Source Beam Line Station Project(1173SRCZ01)

Abstract: Background

Back Compton scattering (BCS) as a photon acceleration mechanism, has gained more attention and application in recent years.


This study aims to investiage the polarized gamma beam characteristics of laser Compton scattering (LCS) gamma source based on the soft X-ray free electron laser (SXFEL).


The numerical simulation method was employed to study the beam properties of LCS source based on SXFEL. Characteristics of its energy, flux, polarization and quasi single energy were analysed in details.


The results show that the LCS gamma source has the advantages of high energy, high flux, high polarization and monoenergetic beam. The gamma ray energy can be changed continuously between 1 MeV and 80 MeV by adjusting the electron energy and the laser wavelength. With a collimator gamma energy resolution will reach ≤4%. Most importantly, the gamma rays are nearly 100% polarized and the polarized gamma beam spot is affected by the laser polarization properties.


The calculation shows that the LCS gamma source at SXFEL will be a high quality gamma facility with high energy resolution and high degree of polarization.

Key words: LCS gamma source, Polarized gamma ray beam, Beam spot

CLC Number: 

  • O572.21+3,O571.42+4,O571.32+3