Abstract
A quasi-monochromatic X-ray source has been developed via laser Compton scattering (LCS) between a
high power laser and a high charge electron beam on the basis of an S-band compact electron linac at
AIST. The LCS X-ray source consists of the 42 MeV electron linac with a laser photocathode rf gun and
a Ti:Sapphire chirped pulse amplifi cation (CPA) laser system. The LCS X-ray has been generated with
arbitrary center energy of 10 – 40 keV with narrow bandwidth by changing electron energy and collision
angle. The in-line phase-contrast (refraction contrast) imaging and the K-shell absorption edge imaging
with biological specimens have been successfully demonstrated using the LCS X-ray for future medical
applications. We describe details of the LCS X-ray source and these imaging results.
