An Intense $\gamma$-ray Beam Line of 10 MeV Order Based on Compton   Backscattering
  Shanghai Laser Electron Gamma Source, a $\gamma$-ray beam line of 10MeV order was proposed recently. The beam line is expected to generate $\gamma$-ray with maximum energy of 22MeV by backward Compton scattering between CO$_2$ laser and electron in the 3.5GeV storage ring of future Shanghai Synchrotron Radiation Facility. The flux of non-collimated $\gamma$-ray can be 10$^9$ $\sim$ 10$^{10}$s$^{-1}$ if a commercial CO$_2$ laser of 100W order output power is employed and injected with optimized settings. 
W. Guo, W. Xu, J.G. Chen, Y.G. Ma, X.Z. Cai, H.W.Wang, Y. Xu,   C.B.Wang, G.C. Lu, R.Y. Yuan, J.Q. Xu, Z.Y.Wei, Z. Yan, W.Q....