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Oikawa, Kenichi; Maekawa, Fujio; Harada, Masahide; Kai, Tetsuya; Meigo, Shinichiro; Kasugai, Yoshimi; Oi, Motoki; Sakai, Kenji; Teshigawara, Makoto; Hasegawa, Shoichi; et al.
no journal, ,
Construction of NBORU at J-PARC was started in 2003 and completed in 2007, and NOBORU has been got ready to measure the first shot from the pulsed neutron beam from the JSNS. We got the day 1 of JSJS on May 30, 2008, and NOBORU succeeded in the observation of the first neutron shot at 14:25. We verified a basic neutron characteristic of JSNS from various perspectives using NOBORU through the commissioning period of May, June, and September. For example, (1) the neutron intensity and spectrum, (2) the neutron pulse shape, (3) the luminosity distribution of the moderator, etc.. Especially, obtained data of the neutron spectrum and the pulse shape that is the most important matter of the design validation of JSNS are, as far as the present statistics and current proton beam intensity, well agreed with that of the calculated values. These facts show that the design, production, and the installation of JSNS has been correctly performed with the aid of the computer simulations.
Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Nakajima, Kenji; Inamura, Yasuhiro; Takahashi, Nobuaki; Maruyama, Ryuji; Soyama, Kazuhiko; Mizuno, Fumio; Shibata, Kaoru; et al.
no journal, ,
no abstracts in English
Takahashi, Nobuaki; Shibata, Kaoru; Nakajima, Kenji; Arai, Masatoshi; Nakagawa, Hiroshi; Fujiwara, Satoru; Kawakita, Yukinobu*; Sato, Taku*; Tsukushi, Itaru*
no journal, ,
no abstracts in English
Nakatani, Takeshi; Otomo, Toshiya*; Suzuki, Jiro*; Yasu, Yoshiji*; Inamura, Yasuhiro; Arai, Masatoshi
no journal, ,
The neutron scattering experimental instruments have been commissioned from May in this year at J-PARC/MLF. At the same time, the data acquisition software and analysis software of these instruments have begun to be commissioning. The experimental users will control the devices of the instruments and analyze their acquiring data with these software on the software framework of MLF computing environment. In the software framework, they can seamlessly use various software from "Working Desktop" which is based on the script language "Python" through the network. In this presentation, we will report the current status of our software framework.
Kumada, Takayuki; Noda, Yohei; Hashimoto, Takeji; Koizumi, Satoshi
no journal, ,
Recently, we installed 2-channel dynamic nuclear polarization (2ch-DNP) system, which selectively polarize nuclear spins near radicals partially doped in samples. Goal of our study is to determine multiple form factors of multi-component system such as polymers dissolved in solvents using 2ch-DNP and SANS.
Yoshinaga, Makio; Tamura, Itaru; Komeda, Masao; Yamamoto, Kazuyoshi; Sagawa, Hisashi
no journal, ,
no abstracts in English
Tamura, Itaru; Yamamoto, Kazuyoshi; Hazawa, Tomoya; Yoshinaga, Makio; Komeda, Masao; Sagawa, Hisashi
no journal, ,
no abstracts in English
Mg
O
and Cu
Ag
CrOKajimoto, Ryoichi; Matsuda, Masaaki; Kishimoto, Taizo*; Uto, Kazuma*; Hokazono, Takahisa*; Okuda, Tetsuji*
no journal, ,
no abstracts in English
by neutron powder diffractionIgawa, Naoki; Taguchi, Tomitsugu; Fukazawa, Hiroshi; Yamauchi, Hiroki; Utsumi, Wataru
no journal, ,
LiCo
NiMnO has been attracted great attention as the cathode materials for the lithium-ion batteries. The Crystal structure study on LiCoNiMnO was examined using the neutron powder diffraction method. The neutron diffraction data were analyzed by the Rietveld method. It is found that the crystal structure of this material was basically the same one as LiCoO and LiNiO, the space group 
-3
, and that the Li, (Co, Ni, Mn) and O ions were occupied at 3
, 3
and 6
sites, respectively. About 3.8% of Li site was occupied by Ni ion, which value was much smaller than that in LiNiO. This indicates that Ni-substitution at Li site is suppred by the Mn, Co ions.
Ishikado, Motoyuki; Kajimoto, Ryoichi; Shamoto, Shinichi; Arai, Masatoshi; Iyo, Akira*; Miyazawa, Kiichi*; Shirage, P. M.*; Kito, Hijiri*; Eisaki, Hiroshi*; Kim, S.-W.*; et al.
no journal, ,
no abstracts in English
Maruyama, Ryuji; Yamazaki, Dai; Ebisawa, Toru*; Soyama, Kazuhiko
no journal, ,
no abstracts in English
Nakamura, Tatsuya; Sakasai, Kaoru; To, Kentaro; Katagiri, Masaki; Soyama, Kazuhiko; Rhodes, N.*; Schooneveld, E. M.*; Tsutsui, Noriaki*
no journal, ,
no abstracts in English
Nakagawa, Hiroshi; Jochi, Yasumasa*; Kitao, Akio*; Kataoka, Mikio
no journal, ,
no abstracts in English
Meigo, Shinichiro; Oi, Motoki; Kai, Tetsuya; Ono, Takehiro; Ikezaki, Kiyomi; Haraguchi, Tetsuya; Akutsu, Atsushi; Sakamoto, Shinichi; Fujimori, Hiroshi*
no journal, ,
no abstracts in English
To, Kentaro; Yamagishi, Hideshi*; Sakasai, Kaoru; Nakamura, Tatsuya; Soyama, Kazuhiko; Ochi, Atsuhiko*; Tanimori, Toru*
no journal, ,
Neutron scattering experiments involving high-intensity and wide-energy pulsed neutrons are expected to be conducted at the MLF in the J-PARC. These experiments require neutron detectors with features such as a two-dimensional detection area, good spatial resolution, high detection efficiency, and a fast response time. In this study, a gas-based neutron detection system with individual readout method and consisting of a micro-pixel detector head was developed, and preliminary experiments were conducted under neutrons irradiation. To examine the operation of the detector system, the total projection ranges of the secondary particles emitted by the nuclear reaction between neutrons and 
He nuclei are measured and compared with the values obtained from a Monte Carlo simulation. Since the measured projection ranges of the secondary particles agree with the ranges obtained from the Monte Carlo simulation, it is concluded that the operation of the developed system is satisfactory.
Takahashi, Nobuaki
no journal, ,
no abstracts in English
Mn
O
(
Ho, Er)Wakimoto, Shuichi; Takeda, Masayasu; Kakurai, Kazuhisa; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Nishihata, Keisuke*; Noda, Yukio*; Tokura, Yoshinori*
no journal, ,
Polarized neutron diffraction experiments have been performed on multiferroic materials MnO
(Ho, Er) under electric fields in the ferroelectric commensurate (CM) and the low-temperature incommensurate (LT-ICM) phases. It is found that the magnetic chirality is proportional to the electric polarization and magnetic chirality can be switched by the polarity of the electric polarization in both the CM and LT-ICM phases. However, upon the transition from the CM to LT-ICM phase, the reduction of the electric polarization is not accompanied by any reduction of the magnetic chirality, implying that the CM and LT-ICM phases contain different mechanisms of the magnetoelectric coupling.
Nakajima, Kenji; Kajimoto, Ryoichi; Inamura, Yasuhiro; Takahashi, Nobuaki; Osakabe, Toyotaka; Wakimoto, Shuichi; Nakamura, Mitsutaka; Ito, Shinichi*; Aizawa, Kazuya; Suzuya, Kentaro; et al.
no journal, ,
A cold-neutron disk-chopper spectrometer AMATERAS is under construction in Materials and Life Science Facility in J-PARC. AMATERAS is dedicated to inelastic and quisielastic neutron scattering experiments in the range of cold thermal neutron region with high-efficiency and high-resolution. The spectrometer is expected to be ready in the beginning of 2009. In this presentation, we will show current status of construction of AMATERAS and expected scientific results from the spectrometer.
Shibata, Kaoru; Takahashi, Nobuaki; Nakagawa, Hiroshi; Fujiwara, Satoru; Nakajima, Kenji; Arai, Masatoshi; Kawakita, Yukinobu*; Sato, Taku*; Tsukushi, Itaru*
no journal, ,
In the pulsed neutron source of the Material and Life Science Facility (MLF) at J-PARC, we are planning and partially beginning the construction of the near backscattering Si crystal analyzer spectrometer DNA. This is the spectrometer to cover the area of the micro-eV energy range in the several spectrometers which are in the construction or planned the construction in MLF. We will report the present status of the specification of spectrometer and the construction plan.
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