A quasi-monochromatic x-ray pulse has been generated via laser Compton scattering (LCS) with an electron bunch and a laser pulse. The LCS hard x-ray source consisted in a compact S-band 40 MeV linac and a Ti: Sa laser system has been developed at AIST and it has been applied to biological uses. The refraction contrast imaging of a biological specimen has been successfully demonstrated with the LCS hard x-ray. We describe the details of our LCS x-ray source, its applications to biological imaging study, together with a future upgrade plan.
