Improvement of vacuum tube type neutron image intensifier for accelerator-based neutron imaging

A neutron time-of-flight imaging device, which is composed by a neutron image intensifier and a high speed digital camera, was developed in our group. It successes to obtain the neutron spectrum under the 50 Hz repetition of the compact accelerator. The remained subject is on the focusing procedure for the camera. In this study we apply the improved optical system used the fiber optics plate for easy focusing and evaluate the total system.