Hao, Z. R.; Fan, G. T.; Xu, H. H.; Liu, L. X.; Zhang, Y.; Wang, H. W.; Yang, Y. X.; Jin, S.; Chen, K. J.; Sun, Q. K.; Wang, Z. W.

RADIATION MEASUREMENTS

2024, 174, 1879-0925

Hao, Z. R.; Fan, G. T.; Xu, H. H.; Liu, L. X.; Zhang, Y.; Wang, H. W.; Yang, Y. X.; Jin, S.; Chen, K. J.; Sun, Q. K.; Wang, Z. W.

Basing on the slant Compton scattering of 10640 nm photons from a 100 W CO2 2 laser on 3.5 GeV electrons from the Shanghai Light Source, the Shanghai Laser Electron Gamma Source (SLEGS) produces gamma-ray in the energy range of 0.66 MeV-21.7 MeV and flux of 105-107 5 -10 7 photons/s. A Gamma Modulation System (GMS) composed of the collimators, attenuator, beam spot imaging(MiniPIX) and flux monitor(LaBr3 3 detector) was developed to ensure producing bandwidth-variable quasi-monochromatic gamma-ray with a variable-flux at same time. Using the GMS, variable-flux quasi-monochromatic gamma-ray beams with a best bandwidth of 10% in the 90 degrees degrees slant-scattering and 4% in back-scattering were obtained respectively. We report on the performance of the GMS and results of gamma-ray beam modulating measurement with GMS at SLEGS.