Design of Compact Polarized Neutron Imaging System for Accelerator Based Small Neutron Sources

Recently, compact neutron sources have been developed consisting of a small proton accelerator, a Be-target and a moderator, which can be installed in an experimental room. These sources have a possibility of various industrial applications because of their compactness. One of the applications is the polarized neutron imaging system. The system consists of neutron bender, polarizer, spin rotator, sample table, second spin rotator, spin analyzer and 2D-position sensitive detector. Since the neutron source is small and the imaging system should be installed near the moderator, the bender and polarizer have to be properly designed to have relatively wide acceptance angle for the incident beam. In the present study, the design and estimated results of such imaging system for will be presented.