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Two-dimensional neutron gas detector using micro-pixel detector head and individual readout method

To, Kentaro  ; Yamagishi, Hideshi*; Sakasai, Kaoru  ; Nakamura, Tatsuya  ; Soyama, Kazuhiko  ; Ochi, Atsuhiko*; Tanimori, Toru*

Neutron scattering experiments involving high-intensity and wide-energy pulsed neutrons are expected to be conducted at the MLF in the J-PARC. These experiments require neutron detectors with features such as a two-dimensional detection area, good spatial resolution, high detection efficiency, and a fast response time. In this study, a gas-based neutron detection system with individual readout method and consisting of a micro-pixel detector head was developed, and preliminary experiments were conducted under neutrons irradiation. To examine the operation of the detector system, the total projection ranges of the secondary particles emitted by the nuclear reaction between neutrons and $$^{3}$$He nuclei are measured and compared with the values obtained from a Monte Carlo simulation. Since the measured projection ranges of the secondary particles agree with the ranges obtained from the Monte Carlo simulation, it is concluded that the operation of the developed system is satisfactory.

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