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Arai, Masatoshi*; Andersen, K. H.*; Argyriou, D. N.*; Schweika, W.*; Zanini, L.*; Harjo, S.; Kamiyama, Takashi*; Harada, Masahide
Journal of Neutron Research, 23(4), p.215 - 232, 2021/12
Komatsu, Kazuki*; Klotz, S.*; Nakano, Satoshi*; Machida, Shinichi*; Hattori, Takanori; Sano, Asami; Yamashita, Keishiro*; Irifune, Tetsuo*
High Pressure Research, 40(1), p.184 - 193, 2020/02
Times Cited Count：13 Percentile：71.69(Physics, Multidisciplinary)A new high pressure cells for neutron diffraction experiments using nano-polycrystalline anvil is presented. The cell design, off-line pressure generation tests and a gas-loading procedure for this cell are described. The performance is illustrated by powder neutron diffraction patterns of ice VII to 
82 GPa. We also demonstrate the feasibility of single crystal neutron diffraction experiments of Fe
O
at ambient conditions using this cell and discuss the current limitation and future developments.
Kaminaga, Masanori; Haga, Katsuhiro; Kinoshita, Hidetaka; Torii, Yoshikatsu; Hino, Ryutaro; Ikeda, Yujiro
Proceedings of ICANS-XVI, Volume 1, p.125 - 133, 2003/07
no abstracts in English
Sakurai, Kiyoshi; Yamamoto, Toshihiro; Arakawa, Takuya*; Naito, Yoshitaka
Journal of Nuclear Science and Technology, 34(6), p.544 - 550, 1997/06
Times Cited Count：2 Percentile：23.01(Nuclear Science & Technology)no abstracts in English
*
PNC TJ9602 96-004, 49 Pages, 1996/03
To check the accuracy of helium accumulation neutron fluence monitoring (HAFM) technique and the applicability of tag gas activation analysis to fast reactor failed fuel detection, these samples were irradiated at the standard neutron field of the fast neutron source reactor "YAYOI" (Nuclear Engineering Research Laboratory, University of Tokyo). The HAFM samples of 93% enriched B powder of 1 mg contained in a V capsule were set up in the reactor core center (Glory hole :Gy) and another samples including V encapsulated natural B powder of 10 mg, natural B chips and 96% enriched 
LiF thermoluminescence dosimeters were in the leakage neutron field from the reactor core (Fast column :FC). These neutron fields were monitored by the activation foils consisting of Al, Fe, Co, Ni, Cu, Ti, In, Au, 
U, 
Np etc., which were used to derive the neutron flux and spectrum. At the end of March in 1996, the irradiated neutron fluence in the energy more than 0.1Mev reached up to 1.1
10
n/cm
at Gy and 5.410
n/cm at FC, respectively. Two kinds of tag gas samples, which are the mixed gases of isotipically adjusted Xe and Kr contained in stainless steel (SUS) capsules, were irradiated twice at Gy; one is up to 9kWh and the other 7kWh, and after the irradiation, 
-ray spectra were measured for each sample. Through comparison with the -ray spectrum from dummy capsule of no tag gas, the -ray peaks of 
Kr, 
Xe etc., which would be produced from tag gas activation, were able to be clearly identified.
Harjo, S.; Aizawa, Kazuya; Kawasaki, Takuro; Gong, W.; Iwahashi, Takaaki; Ito, Takayoshi*; Abe, Jun*; Nakatani, Takeshi
no journal, ,
Harjo, S.; Kawasaki, Takuro; Gong, W.; Aizawa, Kazuya
no journal, ,
Oi, Motoki; Harada, Masahide; Kai, Tetsuya; Aizawa, Kazuya; Sato, Koichi; Masuyama, Koichi; Kasugai, Yoshimi
no journal, ,
In the J-PARC Materials and Life Science Experimental Facility (MLF), material science experiments using muon and neutron beam are performed. In the MLF, proton beam power was 300KW at May 2014 and it is planning to enhance to 1MW. For proton beam enhancement, we performed evaluation of the shielding performance of the neutron beam instruments. As a result, dose on the shield surface of 16 neutron instruments are sufficiently low for 1MW proton beam operation. However, 4 neutron instruments show high dose rate in particular neutron beam conditions. For these neutron instruments, we have checked the drawings and recalculate the shielding performance and considered a cause. Then based on the measurement results, some shield are added for these four neutron instruments and dose rate are reduced sufficiently to 1MW proton beam operation.
Harada, Masahide; Teshigawara, Makoto; Oi, Motoki; Oikawa, Kenichi; Takada, Hiroshi; Ikeda, Yujiro
no journal, ,
no abstracts in English
Harada, Masahide; Teshigawara, Makoto; Oi, Motoki; Oikawa, Kenichi; Ikeda, Yujiro
no journal, ,
In a spallation neutron source at Materials and Life Science Facility in J-PARC, 3GeV 1MW proton beam hits a mercury target and produced neutron beam provide to neutron instruments. Not only thermal and cold neutrons, but also high energy neutrons provide to the neutron instruments. The high energy neutrons about 1 MeV are available for a high energy neutron irradiation experiment. Because the high energy neutrons to provide the neutron instruments have been estimated by a simulation code, a validation of the high energy neutrons is necessary. In addition, neutron intensity and distribution at a sample position should be brought out as an irradiation field. Therefore, in NOBORU (BL10), high neutron intensity and distribution were measured with the foil activation method of Au, Al, Bi, In and Nb using threshold reactions in case with and without a thermal neutron filter. And the neutron distribution of the high energy neutrons was measured with an Al foil. The validation with the PHITS code indicates good agreement.
Watanabe, Masao; Oku, Takayuki; Kawamura, Seiko; Takata, Shinichi; Su, Y. H.; Takahashi, Ryuta*; Yamauchi, Yasuhiro*; Nakamura, Masatoshi*; Ishikado, Motoyuki*; Sakaguchi, Yoshifumi*; et al.
no journal, ,
At Material Life Science Laboratory (MLF) in J-PARC, each beamline (BL) has standard sample environment (SE) equipment, while our SE team is organized to maintain BL common sample environment equipment and support the users. We have expensive equipment that is not frequently used but indispensable, and that requires specialized knowledge and skills for operation as BL common SE equipment. The SE team has sub-teams as;(1) cryo & magnet, (2) high temperature, (3) stress (high pressure, tension and fatigue machine), (4) soft matter, (5) humidity, (6) special environment (pulsed magnet, light irradiation and computation). In this presentation, we will explain the current status of BL common sample environment equipment.
Watanabe, Masao; Nojiri, Hiroyuki*
no journal, ,
In J-PARC MLF, we have been developing a compact and transportable pulsed magnet system as one of the sample environment equipment so that it can be installed in various beamlines. The developed pulsed magnet can generate up to 30 Tesla, can cool down to 4K with a GM refrigerator, and can handle up to room temperature using a heater. In this presentation, we will show the characteristics of the pulsed magnet, the result of a neutron scattering beam experiment. And also, we will show the plans of increasing the pulsed magnetic field up to 35 Tesla and long-pulse experiments.
Harada, Masahide; Yamaguchi, Yuji; Hashimoto, Norimichi*; Ito, Taku*; Tajima, Takahiro*; Oku, Takayuki; Haga, Katsuhiro; Ikeda, Hiroshi*; Tamura, Satoshi*
no journal, ,
In Materials and Life Science Experimental Facility at J-PARC, carbon and mercury targets bombarded by 3 GeV and 1 MW proton beam produce muons and neutrons to provide to muon and neutron instruments. As the samples irradiated by muons and neutrons produce radioactive materials, an estimation of the radioactive materials produced in the irradiated samples is necessary for the stable operation and management of the facility. Therefore, a sample radio-activity evaluation code was developed using data from the DCHAIN-SP-2001 code. By selecting the irradiation conditions for each experiment and entering the information for each sample, the radio-activity of a sample can be calculated by multiplying the neutron flux by the activation cross section. The code is a servlet application, programed by JAVA, accessible on the Web, and can be used from the internal network. In the future, we will conduct activation experiments on various materials and validate this code.
