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Morooka, Satoshi; Xu, P. G.; Shibayama, Yuki; Sasaki, Miki; Shobu, Takahisa
no journal, ,
no abstracts in English
Tsuchikawa, Yusuke; Kai, Tetsuya; Parker, J. D.*; Oikawa, Kenichi; Shinohara, Takenao
no journal, ,
no abstracts in English
Hasemi, Hiroyuki; Tatsumi, Kazuyoshi; Sato, Hirotaka*; Kamiyama, Takashi*
no journal, ,
no abstracts in English
Motokawa, Ryuhei; Kumada, Takayuki; Nakagawa, Hiroshi; Ueda, Yuki; Sekine, Yurina; Micheau, C.; Sugita, Tsuyoshi; Oba, Yojiro*
no journal, ,
no abstracts in English
Kurihara, Kazuo*; Kono, Fumiaki*; Shimizu, Rumi*; Tamura, Itaru; Tamada, Taro*
no journal, ,
no abstracts in English
Harayama, Isao; Kurita, Keisuke; Iikura, Hiroshi; Tsuchikawa, Yusuke; Kai, Tetsuya; Shinohara, Takenao; Matsubayashi, Masahito; Odaira, Naoya*; Ito, Daisuke*; Saito, Yasushi*
no journal, ,
no abstracts in English
Harada, Masahide; Yamaguchi, Yuji; Kawamura, Seiko; Kofu, Maiko; Nirei, Masami; Haga, Katsuhiro; Oku, Takayuki; Matsuura, Masato*; Kusaka, Katsuhiro*; Nakayama, Haruki*
no journal, ,
In the Materials and Life science experimental Facility (MLF) at J-PARC, 3 GeV proton beam is injected into a mercury target to provide neutrons produced by spallation reactions to neutron instruments, and as of June 2023, MLF is operating at 800 kW proton beam output. The intensity of neutrons provided to the neutron instruments is an important factor to characterize the performance of the neutron instruments. So far, neutron intensity measurements have been done with He-3 counters and gold foil activation methods. To measure both spatial distribution and absolute value simultaneously with high accuracy was an issue. To solve this issue, we proposed the large-area gold-foil activation method for thermal neutrons. In this presentation, we will explain the method of the large-area gold foil activation method and report examples of its application to neutron intensity and distribution measurements at BL02, BL03, and BL14.
Okutomi, Toshifumi*; Teshigawara, Makoto; Harada, Masahide; Oi, Motoki; Yamaguchi, Yuji; Kuramoto, Shigeru*
no journal, ,
Silver/gold-indium-cadmium (Ag/Au-In-Cd) alloys as thermal neutron absorbers, which can realize high neutron cut-off energy by combining materials with neutron resonance absorption, have been used at the high-intense spallation neutron source in J-PARC. Recently, it has become difficult to treat materials including Cd. We again focused on boron (
B) having the 1/v absorption and expecting a high neutron cut-off energy as a new thermal neutron absorber. As helium (He) produced by the B(n,
) 
Li reaction causes embrittlement of material including B, it was considered that the use of B was difficult at the high-intense spallation neutron source. Therefore, we have proposed the concept called pre-decoupling, in which other thermal neutron absorber without the He production such as gadolinium (Gd) is combined with B in order to suppress the neutron absorption of B resulting reducing embrittlement. Based on the pre-decoupling concept, we have developed a material dispersing boron carbide (B
C) and gadolinium oxide (Gd
O
) in aluminum (Al) as a base material. In this presentation, we will report tensile test results of the dispersing materials powder-sintered and the vision of the development.
Shibayama, Yuki; Morooka, Satoshi; Xu, P. G.; Shobu, Takahisa
no journal, ,
no abstracts in English
Sakasai, Kaoru; Nakamura, Tatsuya; To, Kentaro
no journal, ,
no abstracts in English
Oda, Takashi; Inoue, Rintaro*; Morishima, Ken*; Aizawa, Naoki*; Oi, Rika*; Ishino, Yoshizumi*; Oku, Takayuki; Sato, Mamoru*; Sugiyama, Masaaki*
no journal, ,
no abstracts in English
Pt
Ga
Tabata, Chihiro; Kaneko, Koji; Haga, Yoshinori; Kon, Fusako*; Hibino, Ruo*; Ota, Kyugo*; Matsumoto, Yuji*; Amitsuka, Hiroshi*; Nakao, Hironori*
no journal, ,
no abstracts in English
Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Kamazawa, Kazuya*; Iida, Kazuki*; Ikeuchi, Kazuhiko*; Ishikado, Motoyuki*
no journal, ,
no abstracts in English
( = Si, Ge)Kaneko, Koji; Tabata, Chihiro; Frontzek, M. D.*; Matsuda, Masaaki*; Oishi, Kazuki*; Ito, Takashi; Munakata, Koji*; Kiyanagi, Ryoji; Kakihana, Masashi*; Hedo, Masato*; et al.
no journal, ,
no abstracts in English
Nakajima, Kenji; Wakimoto, Shuichi
no journal, ,
Materials and Life Science Experimental Facility (MLF) at J-PARC and JRR-3 are both large scale neutron scattering facilities in Japan. These two facilities are located only 800 meters apart on the campus of Nuclear Science Research Institute of Japan Atomic Energy Agency. In this sense, Japanese community is now able to utilize neutrons by combining these two high-intensity neutron sources with different properties. In this presentation, we will introduce the characteristics of both facilities, attempts at collaboration, and various projects using both facilities for neutron users.
Harjo, S.; Gong, W.; Kawasaki, Takuro; Naeem, M.*; He, H.*; Wang, X.-L.*
no journal, ,
no abstracts in English
Harjo, S.; Gong, W.; Kawasaki, Takuro; Mao, W.; Ito, Tatsuya
no journal, ,
no abstracts in English
Kiyanagi, Ryoji; Ohara, Takashi; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*
no journal, ,
no abstracts in English
Inamura, Yasuhiro; Ito, Takayoshi*
no journal, ,
Utsusemi is the series of the software used at many beamlines in J-PARC MLF for the data analysis and visualization. Recently we have improved the visualization software for the inelastic neutron scattering measurements with changing the sample orientation, which is used to observe the wide range of the momentum transfer space. By this improvement, the users can treat the measured data more easily. And we produced new web tools to visualize the area of the energy and momentum transfer with given measurement conditions for the inelastic measurement with sample rotations. This web tool enables users to check the measurable area at the actual instrument before coming to the J-PARC, MLF.
Kodama, Katsuaki; Igawa, Naoki; Nabatame, Nozomi; Sasaki, Miki; Shimojo, Yutaka
no journal, ,
no abstracts in English