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Ebine, Masumi; Katagiri, Masaki; Birumachi, Atsushi; Matsubayashi, Masahito; Sakasai, Kaoru; Sato, Setsuo*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.429 - 432, 2004/08
Times Cited Count：1 Percentile：10.3(Instruments & Instrumentation)no abstracts in English
:Ce
based materials as a neutron storage phosphorSakasai, Kaoru; Katagiri, Masaki; Matsubayashi, Masahito; Nakamura, Tatsuya; Kondo, Yasuhiro*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.378 - 383, 2004/08
Times Cited Count：15 Percentile：68.2(Instruments & Instrumentation)no abstracts in English
Suzuki, Junichi; Oku, Takayuki; Adachi, Tomohiro*; Shimizu, Hirohiko; Kiyanagi, Yoshiaki*; Kamiyama, Takashi*; Hiraga, Fujio*; Iwasa, Hirokatsu*; Sato, Koichi*; Furusaka, Michihiro*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.120 - 124, 2004/08
Times Cited Count：11 Percentile：58.51(Instruments & Instrumentation)no abstracts in English
Oku, Takayuki; Suzuki, Junichi; Sasao, Hajime*; Adachi, Tomohiro*; Shinohara, Takenao*; Ikeda, Kazuaki*; Morishima, Takahiro*; Sakai, Kenji*; Kiyanagi, Yoshiaki*; Furusaka, Michihiro*; et al.
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.116 - 119, 2004/08
Times Cited Count：21 Percentile：77.78(Instruments & Instrumentation)As a neutron has a magnetic dipole moment, it is accelerated in a magnetic field gradient. Thus, we can control a neutron trajectory free from neutron beam attenuation and scattering using the magnetic field gradient. A sextupole magnetic field functions as a neutron focusing and defocusing lens depending on the neutron spin state. The neutron focusing effect was experimentally verified using a 6-piece permanent sextupole magnet. For the application in practical neutron scattering experiments, a sextupole magnet with a sufficiently large aperture accompanied with strong focusing power is demanded. Recently, a superconducting sextupole magnet, a Halbach-type permanent sextupole magnet and a sextupole pulse electro-magnet have been developed in a project of the development and application of neutron optics. These magnets will be dedicated to practical uses in neutron scattering experiments. In this paper, current status of the development of the magnetic neutron lenses is reported, and their application in the neutron scattering experiments is discussed.
Tamura, Itaru; Suzuki, Masatoshi; Hazawa, Tomoya; Moriai, Atsushi; Hori, Naohiko; Sasajima, Fumio; Soyama, Kazuhiko
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.234 - 237, 2004/08
Times Cited Count：4 Percentile：30.89(Instruments & Instrumentation)Thermal neutron guides at JRR-3 reactor have been upgraded from Nickel mirrors to Ni/Ti multilayer supermirrors. We performed the characteristics experiment of neutron beams transmitted through supermirror neutron guides. Neutron fluxes at the end of the thermal neutron guides were measured by the gold foil activation method on March 2003. We have confirmed that neutron fluxes at the end of thermal neutron guide increases by 6 times. The neutron spectra were also measured at the end of the thermal neutron guides by the time-of-flight method. The wavelength range for the neutron beam is extended and the shorter wavelength neutrons, which had been filtered by the characteristics of curved neutron guides before upgrade, were observed. In this paper, we have performed several Monte Carlo simulation codes using the McStas package in the consideration of the performance of fabricated supermirrors and its alignment errors for the purpose of estimation of instruments performance. We discuss the comparison of the experimental results with results of simulation.
Matsubayashi, Masahito; Katagiri, Masaki
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.389 - 393, 2004/08
Times Cited Count：2 Percentile：18.14(Instruments & Instrumentation)no abstracts in English
Matsubayashi, Masahito; Soyama, Kazuhiko
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.384 - 388, 2004/08
Times Cited Count：8 Percentile：48.81(Instruments & Instrumentation)no abstracts in English
Katagiri, Masaki; Sakasai, Kaoru; Matsubayashi, Masahito; Nakamura, Tatsuya; Kondo, Yasuhiro*; Chujo, Yoshiki*; Nanto, Hidehito*; Kojima, Takahiro*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.274 - 279, 2004/08
Times Cited Count：30 Percentile：85.95(Instruments & Instrumentation)no abstracts in English
Katagiri, Masaki
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.254 - 259, 2004/08
Times Cited Count：10 Percentile：55.72(Instruments & Instrumentation)no abstracts in English
Nakamura, Tatsuya; Yamagishi, Hideshi; Masaoka, Sei; Soyama, Kazuhiko; Aizawa, Kazuya
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.336 - 341, 2004/08
Times Cited Count：6 Percentile：40.89(Instruments & Instrumentation)A microstrip gas chamber (MSGC) with a capability of track discrimination for neutron detection was developed whilst ensuring the stability of the MSGC and fulfilling the specifications required for detectors using in high-flux reactors and high-intensity pulsed-neutron sources. The developed two-dimensional detector system comprises a MSGC with individual signal channel read-outs and a new instrument system with a capability of secondary-particle discrimination (InSPaD). The InSPaD identifies the particles -proton and triton- created in the nuclear reaction 
by a simple, fast and cost-effective method using the difference in the track length, and it enables a small amount of heavy gas such as 
with helium-3 to be used as the filling gas whilst achieving a high spatial resolution.
Nakamura, Tatsuya; Katagiri, Masaki; Aratono, Yasuyuki; Kanno, Ikuo*; Hishiki, Shigeomi*; Sugiura, Osamu*; Murase, Yasuhiro*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.399 - 401, 2004/08
Times Cited Count：1 Percentile：10.3(Instruments & Instrumentation)We evaluated the neutron-detection characteristics of a cryogenic neutron detector operating at 1.6 K, which comprises a liquid helium-3 as a neutron converter and an InSb semiconductor detector. The InSb semiconductor detector detected the protons created in the nuclear reaction in the liquid helium-3, where the density of that is ~600 times larger than that of the gaseous helium-3 at room temperature.
ray by a neutron detector comprising a superconducting tunnel junction on a single crystal of Li
B
O
Nakamura, Tatsuya; Katagiri, Masaki; Soyama, Kazuhiko; Ukibe, Masahiro*; Ikeuchi, Takashi*; Okubo, Masataka*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.402 - 404, 2004/08
Times Cited Count：8 Percentile：48.81(Instruments & Instrumentation)We evaluated the neutron--rays discrimination of the neutron detector comprising a superconducting tunnel junction (STJ) on the single crystal of LiBO. The neutron detector was irradiated with X-rays, -rays and neutrons, and the signal pulses were analyzed including pulse height distributions and rise times. It was found that the most of the signal pulses for the neutron-events exhibited slower rise times than those for X-rays and -rays. This indicated the capability of neutron--rays discrimination of the detector using the differences in the decay time of the signal current.
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：63.95(Instruments & Instrumentation)no abstracts in English
-ray discrimination characteristics of novel neutron scintillatorsKatagiri, Masaki; Sakasai, Kaoru; Matsubayashi, Masahito; Kojima, Takahiro*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.317 - 320, 2004/08
Times Cited Count：15 Percentile：66.09(Instruments & Instrumentation)no abstracts in English
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：39 Percentile：90.66(Instruments & Instrumentation)no abstracts in English
Kubota, Naoyoshi*; Katagiri, Masaki; Kamijo, Keiichi*; Nanto, Hidehito*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.321 - 324, 2004/08
Times Cited Count：24 Percentile：81.07(Instruments & Instrumentation)no abstracts in English
B for neutron detectorsKamaya, Eiki*; Matsumoto, Fukashi*; Kondo, Yasuhiro*; Chujo, Yoshiki*; Katagiri, Masaki
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.329 - 331, 2004/08
Times Cited Count：12 Percentile：61.53(Instruments & Instrumentation)no abstracts in English
-Qc supermirror by ion polishingSoyama, Kazuhiko; Tsunoda, Haruhiko*; Murakami, Katsuhiko*
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.73 - 77, 2004/08
Times Cited Count：5 Percentile：36.38(Instruments & Instrumentation)An ion polishing technique has been applied to supermirror coating in order to enhance neutron reflectivity. A Ni/Ti supermirror with a critical value of 3Qc and the total number of layers of 407 was coated in combination with ion polishing. The dependencies of Ar
ion polishing time, ion acceleration energy and incidence angle on the interface roughness were studied and optimized by using X-ray and neutron reflectometry. The reflectivity of the supermirror was measured at the JRR-3 reflectometer of cold beam line. It has reached 90% at the external critical angle, although the non polished one has the reflectivity of 80%.
