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Journal Articles

Investigation of the brightness enhancement using brightness enhancement films on a scintillator

Iikura, Hiroshi; Tsutsui, Noriaki*; Saito, Yasushi*; Nojima, Takehiro; Yasuda, Ryo; Sakai, Takuro; Matsubayashi, Masahito

Physics Procedia, 43, p.161 - 168, 2013/00

 Times Cited Count:4 Percentile:81.12

Journal Articles

Evaluations of the new LiF-scintillator and optional brightness enhancement films for neutron imaging

Iikura, Hiroshi; Tsutsui, Noriaki*; Nakamura, Tatsuya; Katagiri, Masaki*; Kureta, Masatoshi; Kubo, Jun*; Matsubayashi, Masahito

Nuclear Instruments and Methods in Physics Research A, 651(1), p.100 - 104, 2011/09

 Times Cited Count:7 Percentile:53.57(Instruments & Instrumentation)

Japan Atomic Energy Agency has developed the neutron scintillator jointly with Chichibu Fuji Co., Ltd. In this study, we evaluated the new ZnS(Ag):Al/$$^{6}$$LiF scintillator developed for neutron imaging. It was confirmed that the brightness increased by about double while maintaining equal performance for the spatial resolution as compared with a conventional scintillator. High frame-rate imaging using a high-speed video camera system and this new scintillator made it possible to image beyond 10000 frames per second while still having enough brightness. This technique allowed us to obtain a high-frame-rate visualization of oil flow in a running car engine. Furthermore, we devised a technique to increase the light intensity of reception for a camera by adding brightness enhancement films on the output surface of the scintillator. It was confirmed that the spatial resolution degraded more than double, but the brightness increased by about three times.

JAEA Reports

Development for upgrading Japanese ENGIN-X type linear scintillation neutron detectors; Development of new ZnS scintillator, light reflector and digital signal processing module

Nakamura, Tatsuya; Katagiri, Masaki; Birumachi, Atsushi; Ebine, Masumi; Tsutsui, Noriaki*; Soyama, Kazuhiko; Schooneveld, E. M.*; Rhodes, N. J.*

JAEA-Research 2008-116, 26 Pages, 2009/03

JAEA-Research-2008-116.pdf:4.25MB

New ZnS scintillator, light reflector and digital signal processing modules were developed to upgrade the Japanese ENGIN-X type linear scintillation neutron detector. The developed ZnS/$$^{10}$$B$$_{2}$$O$$_{3}$$ scintillator improved detector efficiency by a factor 1.2 for neutrons with a wavelength of 1 ${AA}$ whilst the detector maintained similar $$gamma$$ sensitivity and multi-count ratio compared to the present AST (4:1) scintillator. The paint coating less light reflector was developed with an aluminum reflector with etched surface. The detector implemented with this reflector exhibited similar detector performances with paint coating reflectors, confirming feasibility of the reflector with long-term stability. The digital signal-processing module incorporating photon-counting method was successfully developed. The fully digitalized photon counting system improved a temperature stability of neutron counts significantly comparing to the present analogue system.

Journal Articles

Neutron scintillators with high detection efficiency

Kojima, Takahiro*; Katagiri, Masaki; Tsutsui, Noriaki*; Imai, Koji*; Matsubayashi, Masahito; Sakasai, Kaoru

Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.325 - 328, 2004/08

 Times Cited Count:33 Percentile:89.3(Instruments & Instrumentation)

no abstracts in English

Journal Articles

$$^{238}$$U M$"o$ssbauer study of UPt$$_{3}$$

Tsutsui, Satoshi; Nakada, Masami; Nasu, Saburo*; Haga, Yoshinori; Yamamoto, Etsuji; Kimura, Noriaki*; Onuki, Yoshichika

Journal of Magnetism and Magnetic Materials, 226-230(Part.1), p.87 - 88, 2001/05

no abstracts in English

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 14; Development of ZnS/$$^{10}$$B$$_{2}$$O$$_{3}$$ ceramic scintillator

Katagiri, Masaki; Tsutsui, Noriaki*; Kojima, Takahiro*; Schooneveld, E.*; Rhodes, N.*; To, Kentaro; Sakasai, Kaoru; Soyama, Kazuhiko; Nakamura, Tatsuya

no journal, , 

ZnS/$$^{10}$$B$$_{2}$$O$$_{3}$$ ceramic scintillator was developed to improve a detector efficiency of the fibre-coded position sensitive neutron detector. The developed scintillator improved the detector efficiency by a factor 1.2 for neutrons with a wavelength of 1 ${AA}$.

Oral presentation

High detector efficiency neutron sensitive ZnS scintillator for TAKUMI instrument in J-PARC/MLF

Nakamura, Tatsuya; Sakasai, Kaoru; To, Kentaro; Katagiri, Masaki; Soyama, Kazuhiko; Rhodes, N.*; Schooneveld, E. M.*; Tsutsui, Noriaki*

no journal, , 

no abstracts in English

Oral presentation

A Large area position-sensitive scintillator neutron detector using wavelength-shifting fibers

Nakamura, Tatsuya; Tsutsui, Noriaki*; Katagiri, Masaki*; To, Kentaro; Sakasai, Kaoru; Birumachi, Atsushi; Ebine, Masumi; Soyama, Kazuhiko

no journal, , 

JP, 2010-003182   Patent publication (In Japanese)

A position-sensitive neutron detector that can be alternative to a conventional helium-3 gas detector is vital to address emerging helium-3 shortage problem. We have proposed a new position-sensitive scintillator detector that employs wavelength-shifting fibers for light read out. The small prototype detector that has pixels of 7 $$times$$ 8 with a pixel size of 5 $$times$$5 mm exhibited a spatial resolution of 5 mm, $$gamma$$ sensitivity of about $$10^{-6}$$ and a detector efficiency of about 30% for thermal neutrons. This type of detector is one of the promising candidates for the helium-3 detector alternatives.

Oral presentation

Evaluation of the new Li-scintillator used thermal neutron radiography and the optional brightness-up sheet

Iikura, Hiroshi; Tsutsui, Noriaki*; Nakamura, Tatsuya; Katagiri, Masaki*; Kureta, Masatoshi; Kubo, Jun*; Matsubayashi, Masahito

no journal, , 

Japan Atomic Energy Agency has developed the neutron scintillator jointly with Chichibu Fuji Co., Ltd. In this study, we evaluated the new $$^{6}$$LiF/ZnS scintillator developed for neutron imaging. It was confirmed that brightness becomes light about 3 times while maintaining the equal performance for the spatial resolution compared with the conventional product. When high frame rate imaging was performed using high-speed-imaging system and this scintillator, it became possible to image beyond 10,000 frames per second while having enough brightness. This technique enabled us to get real-time imaging of behavior of oil in automobile engine accurately.

Oral presentation

A Large area position-sensitive scintillator neutron detector using wavelength-shifting fibers, 2; Detector performances of prototype detector

Nakamura, Tatsuya; Sakasai, Kaoru; To, Kentaro; Birumachi, Atsushi; Ebine, Masumi; Soyama, Kazuhiko; Katagiri, Masaki*; Tsutsui, Noriaki*

no journal, , 

A position-sensitive neutron detector that can be alternative to a conventional helium-3 gas detector is vital to address emerging helium-3 shortage problem. We have proposed a new position-sensitive scintillator detector that employs wavelength-shifting fibers for light read out. The prototype detector that has pixels of 64 $$times$$ 64 with a pixel size of 5 $$times$$5 mm was prepared. The detector exhibited a spatial resolution of 5 mm, $$gamma$$ sensitivity of about 10$$^{-6}$$ and a detector efficiency of about 20% for thermal neutrons, confirming the feasibility as a beam line detector for the single crystal diffractometer.

Oral presentation

A Large area position-sensitive scintillator neutron detector using wavelength-shifting fibers, 3; Design and evaluation of detector performance for beam line detector

Nakamura, Tatsuya; Kawasaki, Takuro; Sakasai, Kaoru; To, Kentaro; Birumachi, Atsushi; Ebine, Masumi; Soyama, Kazuhiko; Katagiri, Masaki*; Tsutsui, Noriaki*

no journal, , 

A position-sensitive neutron detector that can be alternative to a conventional $$^{3}$$He gas detector is vital to address emerging $$^{3}$$He shortage problem. We have developed a new position-sensitive scintillator detector that employs wavelength-shifting fibers for light read out for the beam line of 17 and 18 in J-PARC/MLF. The detector that has 64$$times$$64 pixels with a each size of 4$$times$$4 mm exhibited a spatial resolution of 4 mm, $$gamma$$ sensitivity of about 10$$^{-6}$$ and a detector efficiency of 30-40% for thermal neutrons. These detector performances surely satisfied the detector specifications required to the beam line of 17 and 18.

Oral presentation

Development of scintillation neutron detector J-PARC MLF

Nakamura, Tatsuya; To, Kentaro; Tsutsui, Noriaki; Sakasai, Kaoru

no journal, , 

We have developed various types of two-dimensional scintillation neutron detectors for neutron scattering instruments in the J-PARC MLF. Particularly the detector type using neutron-sensitive scintillation screen coupled with wavelength-shifting fibers has great flexibility in detector design, and they have been successfully employed for the beamline detectors. In this paper present status of the new detector development including 100-um spatial resolution imager, BIX-P2 detector will be presented.

Oral presentation

High-resolution scintillation neutron detector for ToF neutron diffraction imaging

Nakamura, Tatsuya; Kawasaki, Takuro; To, Kentaro; Tsutsui, Noriaki; Ebine, Masumi; Birumachi, Atsushi; Sakasai, Kaoru

no journal, , 

A two-dimensional neutron detector with a spatial resolution of 200 um was developed for neutron diffraction imaging at J-PARC MLF. The detector was designed by using a thin scintillator screen and wavelength shifting fibers to fulfill the requirement for our demonstrative diffraction experiment planed in the MLF. In this paper design and experimental results of the developed detector are presented.

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