A high intensity beam line of gamma-rays up to 22 MeV energy based on Compton backscattering

Shanghai Laser Electron Gamma Source, a high intensity beam line of gamma-ray, has been proposed recently. The beam line is expected to generate gamma-rays up to the maximum energy of 22 MeV by Compton backscattering between a CO2 laser and electrons in the 3.5 GeV storage ring of the Shanghai Synchrotron Radiation Facility. The flux of non-collimated,gamma-rays is estimated to be 10(9)-10(10) s(-1) when a CO2 laser of several hundred Wait power is employed. We will discuss physics issues in the design and optimization of the beam line. (C) 2007 Elsevier B.V. All rights reserved.