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Journal Articles

The Implementation of the dynamics analysis spectrometer DNA; The Pedigree of the backscattering neutron spectrometer

Shibata, Kaoru

Hamon, 28(1), p.26 - 28, 2018/02

https://doi.org/10.5611/hamon.28.1_26

We briefly introduce the pedigree of the backscattering neutron spectrometer and the specification of DNA; a time-of-flight (TOF) type near-backscattering spectrometer (n-BSS), with Si crystal analyzers which was constructed at the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC).

Journal Articles

Minor actinide neutron capture cross-section measurements with a 4 Ge spectrometer

Koizumi, Mitsuo; Osa, Akihiko; Toh, Yosuke; Kimura, Atsushi; Mizumoto, Motoharu; Oshima, Masumi; Igashira, Masayuki*; Osaki, Toshiro*; Harada, Hideo*; Furutaka, Kazuyoshi*; et al.

Nuclear Instruments and Methods in Physics Research A, 562(2), p.767 - 770, 2006/06

https://doi.org/10.1016/j.nima.2006.02.051

Times Cited Count：6 Percentile：43.85(Instruments & Instrumentation)

In order to measure the neutron capture cross section of minor actinides, we have proposed the use of a 4 Ge spectrometer. A Time-of-Flight neutron beam line for the experiment has been constructed at the KURRI electron LINAC. The assembling of the 4 Ge spectrometer is in progress. We are also developing a new data acquisition system based on a digital processing technique.

Journal Articles

Design of a single moderator-type neutron spectrometer with enhanced energy resolution in energy range from a few to 100 keV

Tanimura, Yoshihiko; Saegusa, Jun; Yoshizawa, Michio; Yoshida, Makoto

Nuclear Instruments and Methods in Physics Research A, 547(2-3), p.592 - 600, 2005/08

https://doi.org/10.1016/j.nima.2005.03.162

Times Cited Count：8 Percentile：52.87(Instruments & Instrumentation)

The moderator structure of a neutron spectrometer was optimized with a Monte Carlo code of MCNP-4B. The spectrometer consists of a cylindrical moderator and a position-sensitive thermal neutron detector. It can obtain an energy spectrum from thermal neutron distribution along the cylindrical axis of the moderator. The structure of the moderator was improved by putting a low hydrogen density material in the front of a high hydrogen density one and inserting a neutron absorber which eliminated thermal neutrons diffusing in the moderator. These improvements make energy resolution of the spectrometer better especially for the low energy neutrons from a few tens to 100 keV. The designed spectrometer can be applied to the measurement of energy spectrum over a neutron energy range from a few keV to 20 MeV.

Journal Articles

Neutron diagnostics for the energetic ion transport analysis

Nishitani, Takeo; Osakabe, Masaki*; Shinohara, Koji; Ishikawa, Masao

Purazuma, Kaku Yugo Gakkai-Shi, 80(10), p.860 - 869, 2004/10

http://ci.nii.ac.jp/naid/110003827867

no abstracts in English

Journal Articles

High efficiency indirect geometory crystal analyzer TOF spectrometer; DYANA dedicated to biology, planning in JSNS

Shibata, Kaoru; Tamura, Itaru; Soyama, Kazuhiko; Arai, Masatoshi; Middendorf, H. D.*; Niimura, Nobuo

Proceedings of ICANS-XVI, Volume 1, p.351 - 354, 2003/07

In this research report we describe the design of DYANA, a new neutron spectrometer dedicated for biology, biomaterials, and related soft-matter studies, which will be installed in the material and life science experimental facility project at the JAERI Tokai establishment. The DYANA spectrometer is an indirect-geometry crystal-analyzer instrument and its energy and momentum transfer range are from several 10eV to several meV and from 0.1 $AA ^{-1}$ to several $AA ^{-1}$ , respectively. These specifications will become possible to do the study of protein dynamics analysis.

Journal Articles

Creation of new McStas components of moderators of JSNS for developing new pulse spectrometer

Tamura, Itaru; Aizawa, Kazuya; Harada, Masahide; Shibata, Kaoru; Maekawa, Fujio; Soyama, Kazuhiko; Arai, Masatoshi

Proceedings of ICANS-XVI, Volume 1, p.529 - 539, 2003/07

Moderator components of the McStas code have been created for the design of the spectrometers of JSNS. Three cryogenic moderators are adopted in JSNS, One is a coupled H $_{2}$ moderator for high intensity experiments and other two are decoupled H $_{2}$ with poisoned or unpoisoned for high resolution moderators. Monte Carlo simulations have turned out to be useful for design of neutron scattering instruments with high complexity. The software package McStas is selected for its own flexibility. Since the characteristics of neutron beams generated from moderators make influence on the performance of pulse neutron spectrometers, it is important to perform the simulation with neutron source component written precisely. Both Energy dependence of neutron spectrum and time structure of neutrons were calculated using NMTC/JAERI97 and MCNP4a codes.The simulation parameters, which describe the pulse shape as a function of time, are optimized. The creation of neutron source components viewed to coupled H $_{2}$ moderator and viewed to decoupled H $_{2}$ moderator of JSNS are reported.

JAEA Reports

Simulation for developing new pulse neutron spectrometers, 1; Creation of new McStas components of moderators of JSNS

Tamura, Itaru; Aizawa, Kazuya; Harada, Masahide; Shibata, Kaoru; Maekawa, Fujio; Soyama, Kazuhiko; Arai, Masatoshi

JAERI-Research 2003-008, 34 Pages, 2003/03

JAERI-Research-2003-008.pdf:1.62MB

Moderators components of the McStas code have been created for the design of JSNS instruments. Three cryogenic moderators are adopted in JSNS, One is coupled H $_{2}$ moderators for high intensity experiments and other two are decoupled H $_{2}$ with poisoned or unpoisoned for high resolution moderators. Since the characteristics of neutron beams generated from moderators make influence on the performance of pulse neutron spectrometers, it is important to perform the Monte Carlo simulation with neutron source component written recisely. The neutron spectrum and time structure were calculated using NMTC/JAERI97 and MCNP4a codes. The simulation parameters, which describe the pulse shape over entire spectrum as a function of time, are optimized. In this paper, the creation of neutron source components for port No.16 viewed to coupled H $_{2}$ moderator and for port No.11 viewed to decoupled H $_{2}$ moderator of JSNS are reported.

JAEA Reports

A Design of neutron inelastic scattering spectrometer for protein dynamics analysis: DYANA

Shibata, Kaoru; Tamura, Itaru; Soyama, Kazuhiko; Arai, Masatoshi; Niimura, Nobuo

JAERI-Research 2002-036, 30 Pages, 2003/03

JAERI-Research-2002-036.pdf:1.79MB

In this research report we describe the design of DYANA, a new neutron spectrometer dedicated for biology, biomaterials, and related soft-matter studies, which will be installed in the material and life science experimental facility project at the JAERI Tokai establishment. The DYANA spectrometer is an indirect-geometry crystal-analyzer instrument and it's energy and momentum transfer range are from several 10eV to several meV and from 0.1 $AA ^{-1}$ to several $AA ^{-1}$ , respectively. These specifications will become possible to do the study of protein dynamics analysis.

Journal Articles

Neutronics experiments for ITER at JAERI/FNS

Konno, Chikara; Maekawa, Fujio; Kasugai, Yoshimi; Uno, Yoshitomo; Kaneko, Junichi; Nishitani, Takeo; Wada, Masayuki*; Ikeda, Yujiro; Takeuchi, Hiroshi

Nuclear Fusion, 41(3), p.333 - 337, 2001/03

https://doi.org/10.1088/0029-5515/41/3/311

Times Cited Count：3 Percentile：10.97(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports