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Nakamura, Tatsuya; To, Kentaro; Koizumi, Tomokatsu; Kiyanagi, Ryoji; Ohara, Takashi; Ebine, Masumi; Sakasai, Kaoru
Proceedings of 2022 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room Temperature Semiconductor Detector Conference (2022 IEEE NSS MIC RTSD) (Internet), 2 Pages, 2022/11
A new thin position-sensitive scintillation neutron detectors have been developed to replace present scintillation detectors in SENJU diffractometer at J-PARC MLF. The SENJU diffractometer originally composed of 37 position-sensitive detectors, where each detector has neutron sensitive area of 256 
256 mm with a pixel size of 4 4 mm. To renew some original detectors the new detectors have been developed based on ZnS scintillator and wavelength-shifting fibers technology. The developed replacement detectors were designed with a thin thickness of 12 cm, which is 40% of the original detector. The new detectors have also improved detector performances to the original ones in terms of detection efficiency (
60% for 2-A neutrons) and count uniformity (5-8%). The produced six detector modules have been implemented to the beamline after checking their detector performances in the lab.
Terasaka, Yuta; Watanabe, Kenichi*; Uritani, Akira*
Hoshasen (Internet), 47(3), p.89 - 96, 2022/10
Nakamura, Tatsuya; To, Kentaro; Sakasai, Kaoru
Hamon, 27(1), p.4 - 7, 2017/01
Development of scintillation neutron detectors using wavelength-shifting fiber (WLSF) technology at J-PARC MLF is briefly reviewed. The neutron-detecting head of this type detector comprises neutron-sensitive scintillator screens and WLSFs for light read out. The light collection using WLSFs enables us to design a detector with great flexibility. Detector specifications such as pixel size, spatial resolution, and neutron-sensitive area can be optimized to requirements in specific applications. We have intensively developed these detectors since 2005. A large number of detector modules have been produced and delivered to the neutron scattering instruments in the MLF. In this paper the design of SENJU detector is presented in detail together with recent development effort for detector technology alternative to helium-3 gas detectors.
Nishimura, Akihiko; Takenaka, Yusuke*; Furuyama, Takehiro*; Shimomura, Takuya; Terada, Takaya; Daido, Hiroyuki
Journal of Laser Micro/Nanoengineering, 9(3), p.221 - 224, 2014/11
Times Cited Count：0 Percentile：0(Nanoscience & Nanotechnology)Heat resistant FBG sensors were developed by femtosecond laser processing to apply them to high temperature operated piping system of nuclear power plants. The FBG sensor was installed on the surface of a steel blade and a vibration test was conducted to detect the resonant vibration frequency of the vibrating blade. The FBG sensor had the heatproof performance at 600
C. A frequency stabilized sensing system using a tunable laser was tested for structural health monitoring in daily operation of nuclear power plants. The FBG sensor was installed on the surface of a steel blade for vibration induced strain measurements. Welding, brazing, soldering and noble metal powder adhesive were discussed for molding the FBG sensors.
Katagiri, Masaki; Matsubayashi, Masahito; Sakasai, Kaoru; Nakamura, Tatsuya; Ebine, Masumi; Birumachi, Atsushi; Rhodes, N.*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.313 - 316, 2004/08
Times Cited Count：13 Percentile：63.86(Instruments & Instrumentation)no abstracts in English
Yamakawa, Koichi; Barty, C. P. J.*
Optics Letters, 28(23), p.2402 - 2404, 2003/12
Times Cited Count：32 Percentile：76.13(Optics)no abstracts in English
Katagiri, Masaki; Sakasai, Kaoru; Matsubayashi, Masahito; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
Nuclear Instruments and Methods in Physics Research A, 513(1-2), p.374 - 378, 2003/11
Times Cited Count：3 Percentile：27.66(Instruments & Instrumentation)no abstracts in English
Yamakawa, Koichi
JAERI-Research 2003-017, 9 Pages, 2003/09
JAERI-Research-2003-017.pdf:0.93MB
We have developed a high-energy, ultrabroadband Ti:sapphire ring regenerative amplifier capable of producing in excess of 20mJ output at a 10Hz repetition rate. The technique of chirped-pulse amplification is used to generate two-color, time-synchronized pulses, with central wavelength separations up to 120nm and with a total energy of 10mJ by using a regenerative pulse shaping technique.
Moribayashi, Kengo
Nuclear Instruments and Methods in Physics Research B, 205, p.346 - 349, 2003/05
Times Cited Count：2 Percentile：21.23(Instruments & Instrumentation)no abstracts in English
To, Kentaro; Katagiri, Masaki; Sakasai, Kaoru; Matsubayashi, Masahito; Birumachi, Atsushi; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
Applied Physics A, 74(Suppl.1), p.S1601 - S1603, 2002/12
Times Cited Count：6 Percentile：28.31(Materials Science, Multidisciplinary)no abstracts in English
Katagiri, Masaki; To, Kentaro; Sakasai, Kaoru; Matsubayashi, Masahito; Birumachi, Atsushi; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
Applied Physics A, 74(Suppl.1), p.S1604 - S1606, 2002/12
Times Cited Count：6 Percentile：28.31(Materials Science, Multidisciplinary)no abstracts in English
O
crystalsKiriyama, Hiromitsu; Inoue, Norihiro*; Yamakawa, Koichi
Optics Express (Internet), 10(19), p.1028 - 1032, 2002/09
Times Cited Count：5 Percentile：28.69(Optics)no abstracts in English
O crystalsKiriyama, Hiromitsu; Nakano, Fumihiko*; Yamakawa, Koichi
Journal of the Optical Society of America B, 19(8), p.1857 - 1864, 2002/08
Times Cited Count：7 Percentile：36.27(Optics)no abstracts in English
Katagiri, Masaki; Sakasai, Kaoru; Kishimoto, Maki; Nakamura, Tatsuya; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
Nuclear Instruments and Methods in Physics Research A, 477(1-3), p.179 - 183, 2002/03
Times Cited Count：4 Percentile：29.34(Instruments & Instrumentation)no abstracts in English
Sakasai, Kaoru; Katagiri, Masaki; Nakamura, Tatsuya; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
IEEE Transactions on Nuclear Science, 49(1), p.156 - 159, 2002/02
Times Cited Count：0 Percentile：0.01(Engineering, Electrical & Electronic)no abstracts in English
Oba, Masaki; Maruyama, Yoichiro
JAERI-Research 2001-040, 24 Pages, 2001/08
JAERI-Research-2001-040.pdf:2.35MB
no abstracts in English
Sakasai, Kaoru; Katagiri, Masaki; To, Kentaro; Nakamura, Tatsuya; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
Journal of the Physical Society of Japan, Vol.70, Supplement A, p.468 - 470, 2001/05
Times Cited Count：11 Percentile：56.42(Physics, Multidisciplinary)no abstracts in English
Katagiri, Masaki; Sakasai, Kaoru; Nakamura, Tatsuya; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
Nuclear Instruments and Methods in Physics Research A, 461(1-3), p.207 - 209, 2001/04
Times Cited Count：3 Percentile：28.26(Instruments & Instrumentation)no abstracts in English
To, Kentaro; Katagiri, Masaki; Sakasai, Kaoru; Nakamura, Tatsuya; Matsubayashi, Masahito; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
JAERI-Conf 2001-002, p.627 - 638, 2001/03
no abstracts in English
Maruyama, Yoichiro; Kato, Masaaki; Ozu, Akira
Optical Pulse and Beam Propagation III (Proceedings of SPIE Vol.4271), p.335 - 338, 2001/01
no abstracts in English
