Development of event-type neutron imaging detectors at the energy-resolved neutron imaging system RADEN at J-PARC

Parker, J. D.*; Harada, Masahide   ; Hayashida, Hirotoshi*; Hiroi, Kosuke  ; Kai, Tetsuya   ; Matsumoto, Yoshihiro*; Nakatani, Takeshi ; Oikawa, Kenichi   ; Segawa, Mariko   ; Shinohara, Takenao   ; Su, Y. H.  ; Takada, Atsushi*; Tanimori, Toru*; Kiyanagi, Yoshiaki*

At the RADEN instrument, we take advantage of the accurate measurement of neutron energy by time-of-flight to perform energy-resolved neutron imaging using event-type neutron imaging detectors. We are continually working to improve these detectors for better spatial resolution and shorter measurement times and, as a user facility, to improve the ease-of-use of their control and analysis software. In particular, we are actively developing a He-based gaseous micropattern detector known as the Micro-pixel chamber based Neutron Imaging Detector ( NID). We have recently redesigned the NID control software to allow full integration into the automated experiment control system at RADEN, and we are carrying out optimization of the analysis algorithms for improved image quality and rate performance.