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Journal Articles

High-temperature short-range order in Mn$$_3$$RhSi

Yamauchi, Hiroki; Sari, D. P.*; Watanabe, Isao*; Yasui, Yukio*; Chang, L.-J.*; Kondo, Keietsu; Ito, Takashi; Ishikado, Motoyuki*; Hagiwara, Masato*; Frontzek, M. D.*; et al.

Communications Materials (Internet), 1, p.43_1 - 43_6, 2020/07

High-temperature short-range order is discovered up to 720 K in Mn$$_3$$RhSi by complementary use of neutron scattering and muon spin relaxation measurements.

Journal Articles

Magnetic properties of one-dimensional quantum spin system Rb$$_2$$Cu$$_2$$Mo$$_3$$O$$_{12}$$ studied by muon spin relaxation

Kawamura, Seiko; Tomiyasu, Keisuke*; Koda, Akihiro*; Sari, D. P.*; Asih, R.*; Yoon, S.*; Watanabe, Isao*; Nakajima, Kenji

JPS Conference Proceedings (Internet), 21, p.011007_1 - 011007_5, 2018/03

Rb$$_2$$Cu$$_2$$Mo$$_3$$O$$_{12}$$ is a one-dimensional quantum spin system with spin frustration. The magnetic ground state of this system has been expected to be incommensurate spin-singlet from a theoretical study. Furthermore, it was recently reported that this system exhibited ferroelectricity under a magnetic field. We carried out $$mu$$SR studies on this system to understand the magnetic properties. A slow muon spin relaxation due to nuclear dipoles is observed in the whole measured temperatures ranging from 0.06 K to 250 K, indicating that no magnetic ordering. The result suggests that the system shows a spin-singlet ground state. Furthermore, it was found that the distribution of the internal magnetic field were slightly enhanced below 10 K. This temperature dependence resembles that of the electric polarization observed in the magnetic field. It may indicate that some local anomaly of charge/spin related to the ferroelectricity is detected by a microscopic probe.

Journal Articles

Introduction of particle transport code PHITS and analytical model for estimating the atmospheric cosmic-ray spectra PARMA

Abe, Shinichiro; Sato, Tatsuhiko

Meson, (47), p.34 - 39, 2018/03

Some researchers actively investigate secondary cosmic-ray muon radiography for imaging of large structures, detecting nuclear matter, and so on. The simulation is one of effective methods to estimate the required time for muon radiography or to optimize detection system. In this report, we introduce particle transport code PHITS and analytical model for estimating the atmospheric cosmic-ray spectra PARMA. Benchmark results are also shown. PHITS describes intensities of terrestrial muons in the ground well. PHITS also shows good agreement with measured data for particle generations from several interactions between muon and material. These results indicate the practicability of PHITS for simulation of muon radiography. PARMA reproduces cosmic-ray spectra on several spots well. Excellent agreement is seen between the measurements and PARMA for muon fluxes with large zenith angles and high energies, which are important for muon radiography.

Journal Articles

Depth-resolved measurements of current-induced spin accumulation in nonmagnetic metal thin films using ultra slow muon

Ito, Takashi; Higemoto, Wataru

KURRI-KR-202, p.42 - 45, 2015/03

no abstracts in English

Journal Articles

Present status of MLF building layout and ancillary facilities

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

JAEA Reports

Accelerator technical design report for High-intensity Proton Accelerator Facility Projest, J-PARC

High-intensity Proton Accelerator Project Team

JAERI-Tech 2003-044, 788 Pages, 2003/03

JAERI-Tech-2003-044.pdf:47.31MB

This report presents the detail of the technical design of the acclerators for the High-Intensity Proton Accelerator Facility Project, J-PARC. The accelerator complex comprises a 400-MeV room-temperature linac (600-MeV superconducting linac), 3-GeV rapid-cycling synchrotron (RCS), and a 50-GeV synchrotron (MR). The 400-MeV beam is injected to the RCS, being accelerated to 3 GEV. The 1-MW beam thus produced is guided to the Materials Life Science Experimental Facility, with both the pulsed spallation neutron source and muon source. A part of the beam is transported to the MR, which provides the 0.75-MW beam to eithter the Nuclear and Fundamental Particle Experimental Facility or the Neutrino Production Target. On the other hand, the beam acclerated to 600 MeV by the superconducting linac is used for the Nuclear Waster Transmutation Experiment. In this way, this facility is unique, being multipurpose one, including many new inventions and Research and Development Results.

Journal Articles

Development of electrochemical hydrogen pump under vacuum condition for a compact tritium gas cycling system

Kato, Mineo; Ito, Takeshi*; Sugai, Hiroyuki; Kawamura, Yoshinori; Hayashi, Takumi; Nishi, Masataka; Tanase, Masakazu; Matsuzaki, Teiichiro*; Ishida, Katsuhiko*; Nagamine, Kanetada*

Fusion Science and Technology, 41(3), p.859 - 862, 2002/05

JAERI has a plane to develop a compact tritium gas recycling system for fusion research. This system is also very attractive for the muon-catalyzed fusion ($$mu$$CF) research at RIKEN-RAL Muon Facility in UK. For the research, JAERI has produced high purity tritium gas of 1,500 Ci and transported it to the Facility. In the $$mu$$CF experiments, the tritium gas was diluted by the deuterium in an optional concentration and the used tritium gas was carried back by the tritium transport container developed to JAERI. If it is possible to recycle the diluted tritium gas, i.e., the used tritium gas is enriched in the experimental site, the $$mu$$CF experiments should be conducted efficiently. rom the above point of view, in this paper, we propose the compact tritium gas recycling system based on the gas chromatography that has already developed in JAERI and a proton conductor.

JAEA Reports

Study of technical issues on proton beam line tunnel in material/life science experimental facility of high intensity proton accelerator project

Sakamoto, Shinichi; Meigo, Shinichiro; Konno, Chikara; Harada, Masahide; Miyake, Yasuhiro*; Kasugai, Yoshimi; Muto, Suguru*; Fujimori, Satoru*; Ono, Takehiro; Ikeda, Yujiro

JAERI-Tech 2001-075, 168 Pages, 2001/12

JAERI-Tech-2001-075.pdf:12.78MB

no abstracts in English

Journal Articles

High purity tritium gas supplied by JAERI for muon catalyzed fusion research at RIKEN-RAL muon facilty

Kato, Mineo; Kurosawa, Kiyoyuki; Sugai, Hiroyuki; Tanase, Masakazu; Matsuzaki, Teiichiro*; Ishida, Katsuhiko*; Nagamine, Kanetada*

KEK Proceedings 99-11, p.113 - 127, 1999/00

no abstracts in English

Journal Articles

New RIKEN-RAL pulsed $$mu$$CF facility and X-ray studies on DT-$$mu$$CF

Nagamine, Kanetada*; *; Ishida, Katsuhiko*; *; *; *; *; *; *; Tanase, Masakazu; et al.

Hyperfine Interactions, 101-102(1-4), p.521 - 538, 1996/00

no abstracts in English

JAEA Reports

None

Kase, Takeshi; Konashi, Kenji

PNC-TN8420 92-022, 33 Pages, 1992/11

PNC-TN8420-92-022.pdf:0.97MB

None

Journal Articles

Fusion reactor and hot atom chemistry

Kudo, Hiroshi

Handbook of Hot Atom Chemistry, p.647 - 662, 1992/00

no abstracts in English

Journal Articles

Doubly-sealed D-T target system for $$mu$$CF experiment at UT-MSL/KEK

*; Ishida, Katsuhiko*; Nagamine, Kanetada*; *; *; Kudo, Hiroshi; Tanase, Masakazu; Kato, Mineo; Umezawa, Hirokazu

Muon Catal. Fusion, 5-6, p.387 - 394, 1991/00

no abstracts in English

JAEA Reports

Review of Studies of the Muon Catalyzed Nuclear Fusion

*

JAERI-M 84-115, 46 Pages, 1984/06

JAERI-M-84-115.pdf:1.31MB

no abstracts in English

Oral presentation

Prospect of physical science emerged from the materials and life science facility, J-PARC

Arai, Masatoshi

no journal, , 

Materials and Life Science Facility of J-PARC is a world class pulsed neutron and muon facility. I will give a lecture what is the prospect in physical science emerged from the facility.

Oral presentation

$$mu$$SR study of ising antiferromagnet SmPt$$_2$$Si$$_2$$

Ito, Takashi; Higemoto, Wataru; Fushiya, Kengo*; Matsuda, Tatsuma*; Aoki, Yuji*

no journal, , 

no abstracts in English

Oral presentation

Muon knight shift in Sr$$_2$$RuO$$_4$$

Higemoto, Wataru; Ito, Takashi; Yoshida, Yoshiyuki*; Baines, C.*

no journal, , 

It is believed that spin triplet superconductivity is realized in Sr$$_2$$RuO$$_4$$. However, there are some objections for the spin triplet superconductivity. The spin triplet superconductivity is suggested mainly from NMR Knight shift measurements. Different form NMR, muon gives us the information completely inside the specimen. In our presentation, we report on the muon Knight shift measurement in Sr$$_2$$RuO$$_4$$.

Oral presentation

Oral presentation

Current preparation status of the muon RF acceleration test with the RFQ for the precision measurement of the muon g-2/EDM

Kitamura, Ryo*; Fukao, Yoshinori*; Ishida, Katsuhiko*; Hasegawa, Kazuo; Hanzawa, Kohei*; Kawamura, Naritoshi*; Kim, B.*; Kondo, Yasuhiro; Mibe, Tsutomu*; Miyake, Yasuhiro*; et al.

no journal, , 

no abstracts in English

31 (Records 1-20 displayed on this page)