Author: Shizuma, T.
Paper Title Page
THPPR065 High Flux Laser-Compton Scattered Gamma-ray Source by Compressed Nd:YAG Laser Pulse. 4124
  • I. Daito, R. Hajima, T. Hayakawa, Y. Hayashi, M. Kando, H. Kotaki, T. Shizuma
    JAEA, Ibaraki-ken, Japan
  • H. Ohgaki
    Kyoto University, Institute for Advanced Energy, Kyoto, Japan
  A non-destructive detection system of nuclear materials hidden in cargo containers is under development in Japan Atomic Energy Agency and Kyoto University. The system is able to be used for the identification of isotopes of special nuclear material in a container by employing Nuclear Resonance Fluorescence triggered by mono-energetic Laser Compton Scattered (LCS) gamma-ray tuned at the energy of the nuclear resonance. One of the most important technologies for such system is generation of gamma-rays at a flux of 3 x105 photon/s. In order to achieve this gamma-ray flux with a compact system, a pulse compression system for Nd:YAG laser based on Stimulated Brillouin Scattering (SBS) has been developed. The laser pulse with a duration of 10 ns (FWHM) from a commercially available Nd:YAG laser is compressed down to a few hundreds ps. As a feasibility study of the proposed system, 400 keV gamma-ray generation is performed at Kansai Photon Science Institute by using 150 MeV electron beam from microtron accelerator and compressed Nd:YAG laser. Experimental results of laser pulse compression and gamma-ray generation are presented.