Design of Neutron Targets with the 4 MeV Cyclotron for BNCT

Abstract

For more than 40 years Boron neutron capture therapy(BNCT) has been studied by thermal neutrons at nuclear reactor facilities. There are many advantages in using accelerator for BNCT as safety, adjustment of both energy and beams. In this paper the development of thin neutron target with cooling fin for 4 MeV proton beams and target with water cooling system was carried out. For testing new target system, we have used not only FLUKA based MCNP for the determination of target thickness but also CFD and CTA for thermal analysis. The R & D has been undertaken to enhance the use of the high current solid targets for p-n reaction. Wide distribution and variation of the incident angle is required to obtain higher yields of neutrons comparable to previous one. The goal of this research aims to improve the target technology to intensify the production capability of epithermal neutrons. The commercial code, ANSYS, was used for the thermal dynamic simulation. The expected irradiating beam current is 2 mA at 2.5 MeV. The application of this neutron source has prominent significance in nuclear technology research, biology, physics, chemistry and industries including neutron radiography.