Design study of the KAERI Compton X-ray source depending on the laser intensity in the linear or non-linear regime

Quasi-monochromatic X-rays can be generated via Compton backscattering at the KAERI superconducting (SC) radio-frequency (RF) Linac system. The KAERI SC RF Linac with one 352 MHz cryomodule is now operating at 10 MeV. For a few keV Compton X-rays, an electron beamline is designed at the straight section, just after the SC linac, while an optical beamline is designed and fabricated based on the fiber laser delivery. Both will be installed in fall, 2006. In this paper, we estimate the parameters of Compton X-rays at a given system using three different commercial lasers and suggest the scheme to generate higher harmonics using an intense ultra-short laser.