Study of the epithermal neutron source for BNCT by bombardment of 400MeV proton

Tahara, Yoshihisa*; Abe, Shinji*; Sasa, Toshinobu   ; Yonai, Shunsuke*; Baba, Mamoru*; Yokobori, Hitoshi*

Conceptual study of the epithermal neutron source for BNCT by the bomberdment of 400 MeV proton which is planned to supply at Japan proton accelerator research complex, J-PARC. The neutron source, which has two neutron extraction port, is designed to obtain epithermal neutron source by the moderation of spallation neutron source from tungsten target using iron and fluental moderator. By the analytical result of the radiation dose in human phantom located at the exit of exposure port, about 60 minutes of irradiation time is obtained by the injection of 5 micro ampere protons. It is shown that this spallation neutron source is applicable to the epithermal neutron source for BNCT.