• K. Lee, S. Hirai, M. Uesaka
  The University of Tokyo, Nuclear Professional School, Ibaraki-ken
• E. Hashimoto
  JAEA, Ibaraki-ken
• T. Natsui
  UTNL, Ibaraki

950 keV X-band Linac has the merits of compact system, and it does not need the radiation safety manager on-site in the public space. Therefore the system we have developed is suitable for the more safe circumstance in airport. Dual energy X-ray concept is introduced for material recognition with Linac these days, because it produce high energy X-ray which is available in case the target is thick and high atomic number material. We suggest two fold scintillator detector concept to induce dual energy X-ray effect. The design of two fold scintillator is decided by MCNP simulation with two scintillator code, CsI and CdWO4. The material recognition is confirmed using aluminium, iron and lead metal in conditions such as various thicknesses and containers.