Development of position-sensitive scintillation neutron detector using wavelength shifting fiber at J-PARC MLF

Nakamura, Tatsuya  ; To, Kentaro  ; Kawasaki, Takuro   ; Kiyanagi, Ryoji  ; Ohara, Takashi   ; Koizumi, Tomokatsu; Ebine, Masumi ; Sakasai, Kaoru  

Position-sensitive scintillation neutron detectors developed using wavelength-shifting (WLS) fiber read out in the Materials and Life Science Experimental Facility of the Japanese Proton Accelerator Research Complex (J-PARC MLF) are briefly reviewed. Several tens of two-dimensional scintillator / WLS fiber detectors have been developed for the single crystal diffractometers. They are implemented to the beam lines of BL03 and BL18. The scintillator / WLS fiber read out technology has many advantages over conventional clear fiber coupled detectors, such as its simple detector structure, flexibility to a pixel size design, and manufacturing cost. In this paper, several examples of the WLS fiber detectors developed at J-PARC MLF are presented together with a recent detector development for the additional detector bank of the BL18. Moreover, a possibility to produce a larger area detector with this technology will be discussed.