1. Collimator system of SLEGS beamline at Shanghai Light Source.
- Author
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Hao, Z.R., Fan, G.T., Wang, H.W., Liu, L.X., Xu, H.H., Utsunomiya, H., Cao, X.G., Xu, B.J., Song, L.L., Hu, X.R., Li, X.X., Yang, Y.X., and Kuang, P.
- Subjects
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COLLIMATORS , *LIGHT sources , *GAMMA ray sources , *COMPTON scattering , *ELECTRON sources , *CARBON dioxide - Abstract
Shanghai laser electron gamma source (SLEGS) is an energy-variable gamma-ray source developed based on the inverse Compton scattering of 10640 nm photons from a 100 W CO 2 laser on 3.5 GeV electrons from the Shanghai Light Source. It produces gamma-rays in the energy range of 0.4–21.7 MeV with a flux of 10 5 –10 7 photons/s. A collimator system was designed to produce quasimonochromatic gamma-ray beams with a best possible bandwidth of 1.1%–4.4% and filter out the substandard gamma-rays. The collimator system composed of coarse and fine collimators, constitutes a critical component of the SLEGS. By Geant4 simulations, we show that the collimator system is effective in tuning beam bandwidths and regular dodecagonal beam spots at the target position. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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