Position-sensitive scintillation detector for neutron diffractometers in J-PARC; A Time-of-flight neutron image detector with a sub 100-micron spatial resolution

Nakamura, Tatsuya  ; To, Kentaro  ; Honda, Katsunori; Ebine, Masumi ; Birumachi, Atsushi; Sakasai, Kaoru  ; Soyama, Kazuhiko  ; Katagiri, Masaki*

We have developed a time-of-flight neutron imager based on the two-dimensional scintillator neutron detector technology for applications in the J-PARC/MLF. The detector is comprised of a thin ZnS scintillator with crossed wavelength-shifting-fibers arrays equipped with the fiber optic taper. The developed detector based on a neutron counting method has a high spatial resolution of less than 100 um in full width at half maximum with a -ray sensitivity of less than 1010. The detector design and basic detector performances are presented.