Simulation program for multiwire-type two-dimensional neutron detector with individual readout

Yamagishi, Hideshi*; To, Kentaro  ; Nakamura, Tatsuya  ; Sakasai, Kaoru  ; Soyama, Kazuhiko  

We are currently developing a multiwire-type two-dimensional neutron detector system for use at the Materials and Life Science Experimental Facility at J-PARC. This system can attain high response time and high spatial resolution by using the individual line readout method. The performance parameters of a gas-based two-dimensional neutron detector, such as spatial resolution and detection efficiency, strongly depend on the mixture gas condition. We developed a simulation program for our multiwire-type two-dimensional neutron detector system to determine the gas condition. Further, a small test system was fabricated to evaluate the simulation program. Experimental results obtained using the small test system agreed well with the simulation results, thus, it was confirmed that the simulation program can be effectively used to determine the gas condition when the required spatial resolution and detection efficiency are known.