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Nakamura, Tatsuya; Kawasaki, Takuro; To, Kentaro; Harjo, S.; Sakasai, Kaoru; Aizawa, Kazuya
JPS Conference Proceedings (Internet), 33, p.011097_1 - 011097_6, 2021/03
A large area, two-dimensional scintillation neutron detector was developed for Takumi diffractometer in the J-PARC MLF. The detector is made based on a scintillator/wavelength shifting fiber technology. The detector has a neutron-sensitive area of 32 
32 cm with a pixel size of 5 5 mm, which is about 1.5-fold larger than the SENJU detector TAKUMI is one of the neutron diffractometers in the MLF dedicated to use for engineering material research. The developed detector array adds new capabilities to the instrument to measure two-dimensional data collection at the back-scattering angles with a better time-of-flight resolution.
64 cm
area position-sensitive scintillation neutron detector as an alternative to helium-3 gas based detectorNakamura, Tatsuya; To, Kentaro; Honda, Katsunori; Ebine, Masumi; Birumachi, Atsushi; Sakasai, Kaoru
Proceedings of 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2015), Vol.1, p.680 - 683, 2016/11
A two-dimensional scintillation neutron detector that has neutron-sensitive area of 64 64 cm was developed for neutron scattering instruments by using wavelength shifting fibers technology. We designed the detector to have a pixel size of 20 20 mm. In order to compensate light attenuation occurred travelling along the wavelength-shifting fiber the scintillation light was read out from both sides of the fiber. The prototype detector exhibited a detection efficiency of 40% for 1.8
neutrons, which was similar to previously developed detector with a smaller size of 32 32 cm. The detailed detector design and experimental results measured by using the pulsed neutrons at the J-PARC/MLF are presented.
JAERI-M 8327, 55 Pages, 1979/07
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JAERI-M 4964, 205 Pages, 1972/09
no abstracts in English
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JAERI-M 4648, 21 Pages, 1971/11
no abstracts in English
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Nuclear Instruments and Methods, 91(1), p.57 - 60, 1971/00
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Journal of Nuclear Science and Technology, 7(6), p.285 - 290, 1970/06
Times Cited Count：5no abstracts in English
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Proc.1st Intern.Cong.of Radiation Protection,Rome,Sept., p.1003 - 1009, 1966/00
no abstracts in English
Hoshi, Katsuya; Nishino, Sho; Yoshida, Tadayoshi; Tsuchiko, Yasuhiro*; Suto, Yudai*
no journal, ,
no abstracts in English
Nakamura, Tatsuya; To, Kentaro; Tsutsui, Noriaki; Ebine, Masumi; Birumachi, Atsushi
no journal, ,
A position-sensitive scintillation detector module for a new protein neutron diffractometer was developed by using a scintillator / wavelength shifting (WLS) fiber technology. The detector module has a spatial resolution of 2.5 mm with a neutron-sensitive area of 320 320 mm. The WLS fibers are arranged in a regular pitch of 2.5 mm in x and y direction and those arrays are placed diagonally. The light reflecting grid is inserted in between the fibers in order for optical isolation and for mechanical support of the fiber. The detector implemented flat 
Li/ZnS screens up and downstream of the WLF fiber arrays. The detector exhibited a detection efficiency of 30-50% for thermal neutron (depending on 
-ray sensitivities) and a count uniformity of ~13%. In this paper detailed detector design and experimental results obtained using a pulsed neutron beam are presented.
Lee, H.-J.; Rodriguez, D.; Rossi, F.; Koizumi, Mitsuo; Takahashi, Tone
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