Development of two-dimensional scintillation neutron detectors at J-PARC

J-PARCでの2次元シンチレータ中性子検出器の開発

中村 龍也  ; 藤 健太郎  ; 坂佐井 馨  

Nakamura, Tatsuya; To, Kentaro; Sakasai, Kaoru

シンチレータと波長シフトファイバを用いた2次元中性子検出器の開発を行っている。当該検出器には検出器のデザインに柔軟性を有するのが利点であり、この積極的活用によりMLFの装置ニーズに特化した検出器を開発できる。本発表では、現在進行中のTAKUMI回折計用の2次元検出器、SENJU用の大面積検出器、さらにはBIX-P2大型たんぱく装置用の高分解能検出器の開発について紹介する。

We have developed scintillator-based neutron detectors by using wavelength-shifting (WLS) fiber technology for the MLF. The two-dimensional scintillator detectors we involved in the development were for single crystal neutron diffractometers iBIX and SENJU, where the pixel sizes of the detectors were optimized depending on the requirements, from 0.50.5 to 44 mm. Based on this fiber technology we have enlarged a neutron-sensitive with a required pixel size for engineering materials diffractometer, TAKUMI. The WLS fiber technology has given us flexibility to design the pixel size to 55 mm with a neutron-sensitive area of 320320 mm. With the extension of this technique we plan to develop a larger area detector for SENJU, which has a neutron-sensitive area of 512512 mm. In this paper details and recent progress of the detector development will be presented.