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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 $$gamma$$-ray sensitivity of less than 1010$$^{-7}$$. The detector design and basic detector performances are presented.

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