[21a-B103-1~6] コロナ禍における放射線計測技術の最新動向

▲ [21a-B103-6] Commissioning and Deployment of the BµNID for Energy-Resolved Neutron Imaging at J-PARC

〇Joseph Don Parker¹、Hirotoshi Hayashida¹、Tetsuya Kai²、Yoshihiro Matsumoto¹、Takenao Shinohara²、Yuhua Su²、Atsushi Takada³、Yusuke Tsuchikawa²、Toru Tanimori³、Yoshiaki Kiyanagi⁴ (1.CROSS、2.JAEA、3.Kyoto Univ.、4.Hokkaido Univ.)

キーワード：neutron imaging, micropattern detector

Energy-resolved neutron imaging employs detailed analysis of the energy-dependent neutron transmission to extract quantitative information on the macroscopic distribution of microscopic features of a sample. To carry out such measurements at the RADEN instrument of J-PARC, we utilize a pulsed neutron beam and time-resolved neutron imaging detectors to record the spatial distribution of the neutron transmission with neutron energy determined via time-of-flight. To better cope with the high-rate environment at J-PARC, we have developed the BµNID (micro-pixel-chamber-based neutron imaging detector with ¹⁰B converter). Built on our existing µNID platform, the BµNID consists of a gaseous time-projection-chamber with a Micro-Pixel Chamber (µPIC) two-dimensional, 400-µm pitch micropattern strip readout, coupled to FPGA-based readout electronics. In this presentation, we will discuss the commissioning of the BµNID, carried out from 2021, and lessons learned under real usage conditions.