Development of Technology and Application of Laser Compton Scattering Gamma-Ray Beam

A laser Compton gamma-ray beam is unique photon source that can supply polarized, tunable, quasimonochromatic high energy photon beam. This gamma-ray source has possibilities to apply to the maintenances, the conservation, the decommissioning and the security of atomic power plants. Present status of gamma-ray beamline on a synchrotron light facility NewSUBARU are reported. Quasimonochromatic gamma-ray beams from 1 MeV to 73 MeV photon energy are achieved. Photo-nuclear reactions using 17 MeV photon energy were tested. Fast neutrons were measured by a time-of-fl ight technique. A dependence of neutron emission distribution on the polarization of gamma-ray was demonstrated. Nuclear transmutation for a disposal of radioactive nuclear waste and a generation of useful radioactive nuclei are tested.