Feasibility study on visualization of transient phenomena using high resolution on-line neutron imaging system at J-PARC

A neutron energy resolved imaging system with a time-of-flight technique has been newly installed at Japan Proton Accelerator Research Complex (J-PARC) with the aim to investigate more preciously spatial distribution of several elements and crystals including various kinds of materials or substances on transient phenomena. A camera (CMOS, 48 frame/sec) equipped the system allows to obtain one TOF image resolved into narrow energy ranges with an each single pulsed neutron consecutively in the energy region from 0.01 to a few keV. Qualities of the images obtained with the system, such as spatial resolution (defined by modulation transfer function, 1.8 at En~ 0.01 eV), neutron energy selectivity of the system, and capability for visualization of transient phenomena, were examined experimentally. The results obtained in the experiments show that the system can visualize the real-time neutron energy resolved images with a good spatial resolution even at transient phenomena.