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Nakajima, Kenji; Kawakita, Yukinobu; Ito, Shinichi*; Abe, Jun*; Aizawa, Kazuya; Aoki, Hiroyuki; Endo, Hitoshi*; Fujita, Masaki*; Funakoshi, Kenichi*; Gong, W.*; et al.
Quantum Beam Science (Internet), 1(3), p.9_1 - 9_59, 2017/12
The neutron instruments suite, installed at the spallation neutron source of the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC), is reviewed. MLF has 23 neutron beam ports and 21 instruments are in operation for user programs or are under commissioning. A unique and challenging instrumental suite in MLF has been realized via combination of a high-performance neutron source, optimized for neutron scattering, and unique instruments using cutting-edge technologies. All instruments are/will serve in world-leading investigations in a broad range of fields, from fundamental physics to industrial applications. In this review, overviews, characteristic features, and typical applications of the individual instruments are mentioned.
Akita, Koichi; Shibahara, Masakazu*; Ikushima, Kazuki*; Nishikawa, Satoru*; Furukawa, Takashi*; Suzuki, Hiroshi; Harjo, S.; Kawasaki, Takuro; Vladimir, L.*
Yosetsu Gakkai Rombunshu (Internet), 35(2), p.112s - 116s, 2017/06
-type Si at room temperatureShiko, Eiji*; Ando, Kazuya*; Kubo, Kazuki*; Saito, Eiji; Shinjo, Teruya*; Shiraishi, Seiji*
Physical Review Letters, 110(12), p.127201_1 - 127201_5, 2013/03
Times Cited Count：153 Percentile：97.35(Physics, Multidisciplinary)A spin battery concept is applied for the dynamical generation of pure spin current and spin transport in -type silicon (-Si). Ferromagnetic resonance and effective s-d coupling in Ni
Fe
results in spin accumulation at the NiFe/-Si interface, inducing spin injection and the generation of spin current in the -Si. The pure spin current is converted to a charge current by the inverse spin Hall effect of Pd evaporated onto the -Si. This approach demonstrates the generation and transport of pure spin current in -Si at room temperature.
Abe, Jun; Arakawa, Masashi*; Hattori, Takanori; Arima, Hiroshi; Kagi, Hiroyuki; Komatsu, Kazuki*; Sano, Asami; Uwatoko, Yoshiya*; Matsubayashi, Kazuyuki*; Harjo, S.; et al.
Review of Scientific Instruments, 81(4), p.043910_1 - 043910_5, 2010/04
Times Cited Count：6 Percentile：30.96(Instruments & Instrumentation)A compact cubic-anvil high-pressure device was developed for in situ neutron powder diffraction studies. In this device, a cubic shaped pressure medium is compressed by six anvils, and neutron beam pass through gaps between the anvils. The first high-pressure experiment using this device was conducted at J-PARC and clearly showed the neutron diffraction patterns of Pb. Combining the cubic-anvil high-pressure device with a pulsed neutron source will prove to be a useful tool for neutron diffraction experiments.
Abe, Jun; Hattori, Takanori; Komatsu, Kazuki*; Arima, Hiroshi; Arakawa, Masashi*; Sano, Asami; Kagi, Hiroyuki; Harjo, S.; Ito, Takayoshi; Moriai, Atsushi; et al.
Journal of Physics; Conference Series, 215, p.012023_1 - 012023_6, 2010/03
Times Cited Count：4 Percentile：81.6(Instruments & Instrumentation)A high-intensity proton accelerator facility named J-PARC has been constructed, and the first neutron beam at J-PARC/MLF was extracted in May of 2008, and user-operation commenced in December of the year. The fist feasibility test of high-pressure neutron experiments were performed with the engineering materials diffractometer "TAKUMI". As results, diffraction profiles of sample embedded in high-pressure devices were obtained. Therefore, it was confirmed that in situ high-pressure neutron diffraction was feasible with the engineering materials diffractometer "TAKUMI".
Kashiwagi, Hiroe*; Takata, Masami*; Sasaki, Akira; Jo, Kazuki*
Joho Shori Gakkai Rombunshi; Suri Moderuka To Oyo (Internet), 48(SIG15), p.189 - 198, 2007/10
no abstracts in English
Mita, Kazuki*; Tanaka, Hirokazu*; Saijo, Kenji*; Takenaka, Mikihito*; Hashimoto, Takeji
Macromolecules, 40(16), p.5923 - 5933, 2007/08
Times Cited Count：41 Percentile：75.03(Polymer Science)A zone heating method, which imposes the moving temperature-gradient field on order in process of various melts in general, enabled to control a macroscopic orientation of microdomain structures in block copolymer bulk. We applied the method to a polystyrene-block-polyisoprene diblock copolymer forming hexagonally packed cylindrical domains (hex-cyl) in the absence of extermal fields. We discovered that the method creates the following special texture of hex-cyl; (1) The texture seemingly consists of volume-filled columnar grains with the grain axis parallel to the temperature gradient axis (defined as the oz axis). (2) The cylinder axis always orients perpendicular to the oz axis with a rotational angle 
of the cylinder axis around the oz axis being fixed within a grain.
Sasaki, Akira; Jo, Kazuki*; Kashiwagi, Hiroe*; Watanabe, Chiemi*; Suzuki, Manabu*; Lucas, P.*; Oishi, Masatoshi*; Kato, Daiji*; Kato, Masatoshi*; Kato, Takako*
Journal of Plasma and Fusion Research SERIES, Vol.7, p.348 - 351, 2006/00
no abstracts in English
Sasaki, Akira; Murata, Masaki*; Kashiwagi, Hiroe*; Jo, Kazuki*; Lukas, P.*; Kato, Daiji*; Murakami, Izumi*
no journal, ,
no abstracts in English
Utsumi, Wataru; Abe, Jun; Hattori, Takanori; Fukazawa, Hiroshi; Yamauchi, Hiroki; Igawa, Naoki; Kagi, Hiroyuki; Arima, Hiroshi*; Arakawa, Masashi; Komatsu, Kazuki*; et al.
no journal, ,
no abstracts in English
Hattori, Takanori; Abe, Jun; Arima, Hiroshi; Arakawa, Masashi; Komatsu, Kazuki*; Okuchi, Takuo*; Kagi, Hiroyuki; Utsumi, Wataru; Harjo, S.; Ito, Takayoshi
no journal, ,
High-pressure neutron experiments have been limited so far due to the small flux of neutron source. Now, the intense pulse neutron source offered from J-PARC opens up the opportunity. Then, we are trying to do high-pressure neutron experiments, which offers information that have been not obtained so far, such as position of light elements and atomic dynamics. In this talk, we reports first high-pressure TOF results taken at the engineering materials diffractometer TAKUMI in J-PARC, and discuss the future prospect on high-pressure neutron diffraction.
Abe, Jun; Hattori, Takanori; Komatsu, Kazuki*; Arima, Hiroshi; Arakawa, Masashi*; Okuchi, Takuo*; Kagi, Hiroyuki; Yagi, Takehiko*; Uwatoko, Yoshiya*; Matsubayashi, Kazuyuki*; et al.
no journal, ,
We have examined the feasibility of in situ neutron powder diffraction under high pressure with the Engineering Materials Diffractometer "TAKUMI", which has been constructed at BL19 in the Materials and Life Science Facility (MLF) of J-PARC. We have tested two types of high pressure devices at TAKUMI, a Paris-Edinburgh press and a Palm cubic anvil cell. Neutron poder diffraction profiles of Pb placed in the high pressure devices as a standard material were collected. As results, diffraction peaks of Pb were clearly observed. In this study, it has been confirmed that in situ neutron powder diffraction under high pressure can be made with a combination of the high pressure devices and the TAKUMI at J-PARC.
Utsumi, Wataru; Kagi, Hiroyuki*; Hattori, Takanori; Arima, Hiroshi; Komatsu, Kazuki*; Abe, Jun; Nagai, Takaya*; Okuchi, Takuo*; Harjo, S.; Aizawa, Kazuya; et al.
no journal, ,
J-PARC is a new high-intensity proton accelerator research facility in Japan. It has a spallation neutron source that will produce the world highest intensity pulsed neutron. It is expected that high pressure material science and the investigation of the Earth's interior will greatly improve at J-PARC. A Paris-Edinburgh cell and a cubic anvil high pressure apparatus have been brought to an Engineering Materials Diffractometer(BL19) to conduct the first high pressure experiment. As the next stage, we are planning to construct a dedicated high pressure beamline that will open in 2011.
Abe, Jun; Hattori, Takanori; Sano, Asami; Arima, Hiroshi; Fukazawa, Hiroshi; Harjo, S.; Ito, Takayoshi; Aizawa, Kazuya; Utsumi, Wataru; Komatsu, Kazuki*; et al.
no journal, ,
The Engineering Materials Diffractometer TAKUMI designed to solve many problems in materials science and engineering including investigations of stresses and crystallographic structures within engineering components was developed at J-PARC. In addition, TAKUMI is suitable for high-pressure experiments. High-pressure devices (Paris-Edinburgh press, palm cubic anvil press and Diamond Anvil Cell) were developed for in situ neutron powder diffraction experiments under high pressures. However, to apply a these high-pressure devices to neutron diffraction, research and development is needed. Issues to be resolved selecting materials, modifying the diffraction window and reducing BKG.
Akita, Koichi; Nishikawa, Satoru*; Shibahara, Masakazu*; Ikushima, Kazuki*; Suzuki, Hiroshi; Moriai, Atsushi; Harjo, S.; Aizawa, Kazuya
no journal, ,
To clarify the residual stress relaxation process in a dissimilar weld joint, the in-situ neutron stress measurements during thermal cycles were conducted using TAKUMI in J-PARC. The materials used for the base plates were a Ni-alloy (NCF600) and a stainless steel (SUS316L). The temperature range was from RT to 593 K. From the experimental results, it was found that residual stress of the Ni-alloy increased, while the residual stress of the stainless steel decreased, in the heating process. And, the residual stress of the Ni-alloy reaches the yield strength of the material in the heating process. It results in the redistribution of the residual stress, and therefore the residual stress relaxation occurs.
Akita, Koichi; Moriai, Atsushi; Suzuki, Hiroshi; Harjo, S.; Nishikawa, Satoru*; Shibahara, Masakazu*; Ikushima, Kazuki*
no journal, ,
Internal residual stresses of a dissimilar weld joint under cyclic thermal aging were measured using neutron diffraction technique and the residual stress relaxation process was investigated.
Kitani, Yuji*; Shibahara, Masakazu*; Ikushima, Kazuki*; Nishikawa, Satoru*; Furukawa, Takashi*; Akita, Koichi; Suzuki, Hiroshi; Morooka, Satoshi; Kawasaki, Takuro; Aizawa, Kazuya; et al.
no journal, ,
no abstracts in English
Nishikawa, Satoru*; Furukawa, Takashi*; Akita, Koichi; Suzuki, Hiroshi; Morooka, Satoshi; Harjo, S.; Shibahara, Masakazu*; Ikushima, Kazuki*; Kitani, Yuji*; Yamada, Yusuke*
no journal, ,
no abstracts in English
Akita, Koichi*; Suzuki, Hiroshi; Morooka, Satoshi; Harjo, S.; Shibahara, Masakazu*; Ikushima, Kazuki*; Nishikawa, Satoru*; Furukawa, Takashi*
no journal, ,
no abstracts in English
Nakamura, Mitsutaka; Kajimoto, Ryoichi; Oikawa, Kenichi; Shinohara, Takenao; Aizawa, Kazuya; Harjo, S.; Iwahashi, Takaaki*; Kamazawa, Kazuya*; Ikeuchi, Kazuhiko*; Iida, Kazuki*; et al.
no journal, ,
We have introduced a new Fermi chopper with compact slit package into the direct geometry neutron spectrometer 4SEASONS in Materials and Life Science Experimental Facility at J-PARC, and succeeded in significantly improving the beam intensity compared to the old model. On the other hand, the new Fermi chopper causes an unexpected intensity tail, which may adversely affects the data analysis. In order to solve this problem, we have proceeded with various inspections of a Fermi chopper blade such as Monte Carlo simulation, neutron transmission spectrum measurement and direct observation with a microscope. In this presentation, we will show some approaches taken to solve the problem and explain the rationale that led to the plausible assumption.
Ichijo, Tsubasa; Nakayama, Kazuhiko; Seshimo, Kazuyoshi; Kojima, Kazuki; Sakurai, Momoka
no journal, ,
no abstracts in English
