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Journal Articles

A Half-millimetre spatial resolution fibre-coded linear position-sensitive scintillator detector with wavelength-shifting fibre read-out for neutron detection

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

Nuclear Instruments and Methods in Physics Research A, 606(3), p.675 - 680, 2009/07

 Times Cited Count:10 Percentile:42.19(Instruments & Instrumentation)

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.

JAEA Reports

Development of two-dimensional scintillator neutron detector using wavelength-shifting fibres; Development of a compact detector for iBIX instrument in J-PARC/MLF

Nakamura, Tatsuya; Katagiri, Masaki; Hosoya, Takaaki*; Birumachi, Atsushi; Ebine, Masumi; Soyama, Kazuhiko; Schooneveld, E.*; Rhodes, N.*

JAEA-Research 2008-115, 33 Pages, 2009/03

JAEA-Research-2008-115.pdf:3.77MB

A compact two-dimensional neutron detector was developed for iBIX instrument in the J-PARC/MLF. The specifications required for the detector were a spatial resolution of less than 1 mm, a detector efficiency of more than 50% for thermal neutrons, a $$gamma$$ sensitivity of less than 10$$^{6}$$, detector coverage of around 15$$times$$15 cm$$^{2}$$ with least dead area, compactness, modularity, and a pulse pair resolution of less than 2 $$mu$$s. The detector components were studied in detail and optimized for the purpose. The compact prototype detector that has a neutron sensitive area of 13.3$$times$$13.3 cm$$^{2}$$ was made and feasibility of the detector was demonstrated successfully in the experiments at the ISIS pulsed neutron source.

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 2; Development of digital signal processing method for ISIS-type 1D neutron detector

Ebine, Masumi; Katagiri, Masaki; Birumachi, Atsushi; Sakasai, Kaoru; Nakamura, Tatsuya; Soyama, Kazuhiko; Sato, Setsuo*; Schooneveld, E.*; Rohdes, N.*

no journal, , 

no abstracts in English

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 8; Pulsed neutron beam test of ISIS-type one-dimensional neutron detector

Sakasai, Kaoru; Katagiri, Masaki; Nakamura, Tatsuya; Soyama, Kazuhiko; Birumachi, Atsushi; Sato, Setsuo*; Rhodes, N.*; Schooneveld, E.*

no journal, , 

no abstracts in English

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 9; Neutron irradiation test of ISIS-type one-dimensional neutron detector

Sakasai, Kaoru; Katagiri, Masaki; Nakamura, Tatsuya; Soyama, Kazuhiko; Birumachi, Atsushi; Sato, Setsuo*; Rhodes, N.*; Schooneveld, E.*

no journal, , 

no abstracts in English

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 12; Neutron diffraction experiments with ISIS-type one-dimensional neutron detector

Sakasai, Kaoru; Katagiri, Masaki; Nakamura, Tatsuya; Soyama, Kazuhiko; Birumachi, Atsushi; Sato, Setsuo*; Rhodes, N.*; Schooneveld, E.*

no journal, , 

no abstracts in English

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 16; Signal processing circuits for high S/N neutron beam monitor

Nakamura, Tatsuya; Katagiri, Masaki; Ebine, Masumi; Hosoya, Takaaki*; Soyama, Kazuhiko; Schooneveld, E.*; Rhodes, N.*

no journal, , 

We have developed pulsed neutron beam monitors with neutron scintillators composed of ZnS phosphors and neutron converters with very low neutron capture cross section. In order to develop neutron beam monitors with high S/N ratio and high counting rate characteristics, signal processing circuits with ISIS-type signal processing algorism were developed because ZnS phosphor has afterglow fluorescence and photomultipliers used for detection of fluorescence has many pulsed electric noises. Detection and signal processing characteristics as neutron beam monitors are reported.

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 13; Fabrication of actual-type one-dimensional neutron detector

Sakasai, Kaoru; Harjo, S.; Nakamura, Tatsuya; Moriai, Atsushi; Katagiri, Masaki; Soyama, Kazuhiko; Rhodes, N.*; Schooneveld, E.*

no journal, , 

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

Current status of neutron detectors for TAKUMI

Sakasai, Kaoru; Nakamura, Tatsuya; Moriai, Atsushi; Harjo, S.; Ito, Takayoshi; Abe, Jun; Aizawa, Kazuya; Soyama, Kazuhiko; Rhodes, N. J.*; Schooneveld, E. M.*

no journal, , 

no abstracts in English

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 17; Performance test of neutron detector for J-PARC engineering diffractometer

Sakasai, Kaoru; Nakamura, Tatsuya; Moriai, Atsushi; Harjo, S.; Ito, Takayoshi; Abe, Jun; Aizawa, Kazuya; Katagiri, Masaki; Soyama, Kazuhiko; Rhodes, N.*; et al.

no journal, , 

no abstracts in English

Oral presentation

Development of scintillator based neutron detectors for intense pulsed neutrons, 18; Development and installation of neutron detector for J-PARC engineering diffractometer

Sakasai, Kaoru; Nakamura, Tatsuya; Harjo, S.; Ito, Takayoshi; Abe, Jun; Aizawa, Kazuya; Katagiri, Masaki*; Soyama, Kazuhiko; Rhodes, N.*; Schooneveld, E.*

no journal, , 

no abstracts in English

Oral presentation

Performance test of a small one-dimensional neutron detector with a high position resolution

Sakasai, Kaoru; Nakamura, Tatsuya; To, Kentaro; Soyama, Kazuhiko; Rhodes, N.*; Schooneveld, E.*

no journal, , 

no abstracts in English

Oral presentation

Neutron diffraction experiments using a small one-dimensional neutron detector

Sakasai, Kaoru; Nakamura, Tatsuya; To, Kentaro; Moriai, Atsushi; Soyama, Kazuhiko; Rhodes, N. J.*; Schooneveld, E. M.*

no journal, , 

no abstracts in English

Oral presentation

Development of high-position resolution 1D-scintillation detector

Sakasai, Kaoru; Nakamura, Tatsuya; To, Kentaro; Soyama, Kazuhiko; Rhodes, N.*; Schooneveld, E.*

no journal, , 

A prototype 1D-scintillaton detector has been developed. The detector has a small sensitive area of 42 mm $$times$$ 196 mm and a position resolution of 1.5 mm that is higher than that of TAKUMI detectors at MLF/J-PARC. The incident neutrons are detected based on ZnS/$$^{6}$$LiF scintillation techniques. The scintillation light produced in ZnS/$$^{6}$$LiF as a result of nuclear reaction of neutrons with 6Li nuclei is detected by photomultiplier tubes (PMTs) via optical fibers set in the back of the scintillator. To determine the incident neutron position and to reduce the number of PMTs, the 2Cn coding was adopted in the fiber arrangement. The electric signals from the PMTs are sent to the data acquisition electronics and the decoder. The fabricated detector showed excellent performances such as a neutron detection efficiency of 67$$%$$ at a neutron wavelength of 1.8 ${AA}$ and a $$gamma$$ sensitivity of less than 10$$^{-6}$$ at a $$gamma$$ energy of 1.3 MeV.

17 (Records 1-17 displayed on this page)
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