Sans-Planell, O.; Shinohara, T.; Grazzi, F.; Cantini, F.; Su, Y.; Matsumoto, Y.; Parker, J.D.; Manke, I.: Redifining RADEN's high-resolution neutron imaging capabilities. Review of Scientific Instruments 95 (2024), p. 113702/1-5
10.1063/5.0235243
Open Access Version
Abstract:
This study presents a significant development in the Energy-Resolved Neutron Imaging System RADEN, in J-PARC, Japan. Through a systematic study, the collimation power of the facility was reevaluated. What was initially considered to be values of 230, 420 and 760, have been proven to be much higher. To perform the calculation of the L/D factor of the beam, a state-of-the-art method has been used, along with a standard reference sample to measure the resolution of neutron images. To add robustness to the results, the study compares 5 different scintillators of different composition and thickness (6LiF:ZnS(Ag) of 50μm, 100μm, 200μm and 300μm and Gd2O2S of 50μm). The calculated collimating power of the beam ranges between 470 and 1520. These results place a spotlight on an existing discrepancy between the geometrically calculated L/D and the actual measurable quantity, as well as highlight the superior performance of the RADEN beamline.