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Journal Articles

Electronic structure of hydrogen donors in semiconductors and insulators probed by muon spin rotation

Shimomura, Koichiro*; Ito, Takashi

Journal of the Physical Society of Japan, 85(9), p.091013_1 - 091013_5, 2016/09

 Times Cited Count:2 Percentile:24.48(Physics, Multidisciplinary)

Journal Articles

Visualization of internal structures of reactor core in the HTTR; Proposal of non-destructive inspection by cosmic-ray muon radiography

Takamatsu, Kuniyoshi

Hokeikyo Nyusu, (56), p.2 - 4, 2015/10

JP, 2010-166333   Licensable Patent Information Database   Patent publication (In Japanese)

In our study, we focused on a nondestructive inspection method by cosmic-ray muons which could be used to observe the internal reactor from outside the RPV and the CV. We conducted an observation test on the HTTR to evaluate the applicability of the method to the internal visualization of a reactor. We also analytically evaluated the resolution of existing muon telescopes to assess their suitability for the HTTR observation, and were able to detect the major structures of the HTTR based on the distribution of the surface densities calculated from the coincidences measured by the telescopes. Our findings suggested that existing muon telescopes could be used for muon observation of the internal reactor from outside the RPV and CV.

Journal Articles

Measurement system of the background proton in DeeMe experiment at J-PARC

Yamamoto, Kazami; Saha, P. K.; Aoki, Masaharu*; Mihara, Satoshi*; Nakatsugawa, Yohei*; Shimizu, Kosuke*; Kinsho, Michikazu

JPS Conference Proceedings (Internet), 8, p.012004_1 - 012004_5, 2015/09

The existence of a mu-e conversion process is expected by some theories beyond the standard model in particle physics, but has not been discovered yet due to its low probability. The DeeMe experiment, proposed at J-PARC Material Life Science Facility (MLF), is planned to find the mu-e conversion process on a Muon production target. In order to distinguish mu-e event signal from a background, the number of a proton that comes after hundreds of nanoseconds from the main beam should be less than one per one hour during the DeeMe experiment. Therefore we designed a new measurement system to confirm low background level. A simulation result showed that the new system could detect such delayed proton.

Journal Articles

Visualization of internal structures of reactor core in the HTTR by cosmic-ray muon radiography; Non-destructive inspection of internal structures of reactor core

Takamatsu, Kuniyoshi

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 57(6), p.389 - 393, 2015/06

JP, 2010-166333   Licensable Patent Information Database   Patent publication (In Japanese)

In our study, we focused on a nondestructive inspection method by cosmic-ray muons which could be used to observe the internal reactor from outside the RPV and the CV. We conducted an observation test on the HTTR to evaluate the applicability of the method to the internal visualization of a reactor. We also analytically evaluated the resolution of existing muon telescopes to assess their suitability for the HTTR observation, and were able to detect the major structures of the HTTR based on the distribution of the surface densities calculated from the coincidences measured by the telescopes. Our findings suggested that existing muon telescopes could be used for muon observation of the internal reactor from outside the RPV and CV.

Journal Articles

Cosmic-ray muon radiography for reactor core observation

Takamatsu, Kuniyoshi; Takegami, Hiroaki; Ito, Chikara; Suzuki, Keiichi*; Onuma, Hiroshi*; Hino, Ryutaro; Okumura, Tadahiko*

Annals of Nuclear Energy, 78, p.166 - 175, 2015/04

 Times Cited Count:7 Percentile:60.95(Nuclear Science & Technology)

In our study, we focused on a nondestructive inspection method by which cosmic-ray muons could be used to observe the internal reactor from outside the RPV and the CV. We conducted an observation test on the HTTR to evaluate the applicability of the method to the internal visualization of a reactor. We also analytically evaluated the resolution of existing muon telescopes to assess their suitability for the HTTR observation, and were able to detect the major structures of the HTTR based on the distribution of the surface densities calculated from the coincidences measured by the telescopes. Our findings suggested that existing muon telescopes could be used for muon observation of the internal reactor from outside the RPV and CV.

Journal Articles

J-PARC and new era of science

Oyama, Yukio

Nuclear Instruments and Methods in Physics Research A, 562(2), p.548 - 552, 2006/06

 Times Cited Count:10 Percentile:59.81(Instruments & Instrumentation)

High Intensity Proton Accelerator Project promoted jointly by Japan Atomic Energy research Institute (JAERI) and High Energy Accelerator Research Organization (KEK), named as J-PARC was started on April 1, 2001. The project was merged from the projects promoted by the both institutes, called Neutron Science Project and Japan Hadron Project, respectively. The accelerator complex of J-PARC consists of three accelerators: 400 MeV Linac, 3 GeV rapid cycle synchrotron and 50 GeV synchrotron, and four major experimental facilities: Material & Life Science Facility, Nuclear & Particle Physics (Hadron) Facility, Neutrino Facility and Nuclear Transmutation Experiment Facility. The present construction phase, Phase-I, excludes nuclear transmutation facility. The accelerators will be completed in 2007 with 200 MeV Linac, and an operation will start. The Neutrino facility will be completed in 2008 and the 200-400 MeV Linac will be constructed in 2008-2010.

JAEA Reports

J-PARC materials and life science facility experimental apparatus installation manual, 1

Neutron Facility Group

JAERI-Tech 2004-059, 106 Pages, 2004/10

JAERI-Tech-2004-059.pdf:6.82MB

The Materials and Life Science Facility is being constructed as one of main facilities in the JAERI-KEK High-Intensity Proton Accelerator Project (J-PARC). Various experimental apparatuses will be installed in 1st and 2nd Experimental Halls in the facility building. Neutron and muon beams provided by the facility are to be utilized for experimental research. This manual provides facility-side information that is needed for designing and installing experimental apparatuses, and summarizes specifications of junction points between the facility-side and user-side as of June, 2004.

JAEA Reports

High Intensity Proton Accelerator Project (J-PARC) technical design report materials & life science experimental facility

Materials & Life Science Experimental Facility Construction Team

JAERI-Tech 2004-001, 1171 Pages, 2004/03

JAERI-Tech-2004-001-Part1.pdf:80.84MB
JAERI-Tech-2004-001-Part2.pdf:43.14MB

This report summarizes conceptual design study up to March, 2003, relevant to the Materials & Life Science Experimental Facility construction which is one of the major user facilities to be constructed under the J-PARC project of High Intensity Proton Accelerator. The first chapter corresponds to the design manual, and the followings stand for the technical parts giving the design principle and detailed results for the studies. As the project is evolving day by day, some of studies have been advanced since the moment of this summary in one hand, and some of parts are close to final stage of design. Including those, more comprehensive and updated version of the technical designs are to be reported accordingly.

Journal Articles

Status of high intensity proton accelerator project and its research program

Oyama, Yukio

Nihon Genshiryoku Gakkai Monte Karuro Ho Ni Yoru Ryushi Shimyureshon No Genjo To Kadai, p.183 - 191, 2001/01

no abstracts in English

Journal Articles

He accumulation effect in solid and liquid D-T mixture

*; Nagamine, Kanetada*; Matsuzaki, Teiichiro*; Ishida, Katsuhiko*; *; Sakamoto, Shinichi*; *; Tanase, Masakazu; Kato, Mineo; Kurosawa, Kiyoyuki; et al.

Hyperfine Interactions, 118(1-4), p.213 - 215, 1999/00

no abstracts in English

Journal Articles

Muon catalyzed fusion and muon to $$^{3}$$He transfer in solid T$$_{2}$$ studied by X-ray and neutron detection

Matsuzaki, Teiichiro*; Nagamine, Kanetada*; Ishida, Katsuhiko*; *; *; Tanase, Masakazu; Kato, Mineo; Kurosawa, Kiyoyuki; Hashimoto, Masashi; Sugai, Hiroyuki; et al.

Hyperfine Interactions, 118(1-4), p.229 - 234, 1999/00

no abstracts in English

Journal Articles

Tritium gas handling system for muon catalyzed fusion research at RIKEN-RAL muon facility

Matsuzaki, Teiichiro*; Nagamine, Kanetada*; Tanase, Masakazu; Kato, Mineo; Kurosawa, Kiyoyuki; Ishida, Katsuhiko*; *; *; G.H.Eaton*

Hyperfine Interactions, 119(1-4), p.361 - 363, 1999/00

no abstracts in English

Journal Articles

Measurement of X-rays from muon to $$alpha$$ sticking and fusion neutrons in solid/liquid D-T mixtures of high tritium concentration

Ishida, Katsuhiko*; Nagamine, Kanetada*; Matsuzaki, Teiichiro*; *; *; Sakamoto, Shinichi*; *; Tanase, Masakazu; Kato, Mineo; Kurosawa, Kiyoyuki; et al.

Hyperfine Interactions, 118(1-4), p.203 - 208, 1999/00

no abstracts in English

Journal Articles

Measurement of the K$$_{beta}$$/K$$_{alpha}$$ ratio of muon to $$alpha$$ sticking X-rays in muon catalyzed d-t fusion at RIKEN-RAL muon facility

*; Nagamine, Kanetada*; Matsuzaki, Teiichiro*; Ishida, Katsuhiko*; *; Sakamoto, Shinichi*; *; Tanase, Masakazu; Kato, Mineo; Kurosawa, Kiyoyuki; et al.

Hyperfine Interactions, 118(1-4), p.209 - 212, 1998/00

no abstracts in English

JAEA Reports

The First Workshop of Neutron Science Research Program; March 12 and 13,1996,JAERI,Tokai,JAPAN

; Tone, Tatsuzo; Mizumoto, Motoharu

JAERI-Conf 96-014, 234 Pages, 1996/09

JAERI-Conf-96-014.pdf:9.7MB

no abstracts in English

Journal Articles

Proposal of neutron science research program

*; ; Tone, Tatsuzo; Mizumoto, Motoharu

10th Pacific Basin Nuclear Conf. (10-PBNC), 2, p.1425 - 1431, 1996/00

no abstracts in English

Journal Articles

Muon transfer and elastic acattering in t+d$$mu$$ collisions at low energies

*; *; Shirai, Toshizo

Physical Review A, 50(6), p.4951 - 4955, 1994/12

 Times Cited Count:30 Percentile:82.29(Optics)

no abstracts in English

Journal Articles

Progress of muon science

; Nagamine, Kanetada*; *; *; Ishida, Katsuhiko*; *; *; Mizumoto, Motoharu

Nihon Genshiryoku Gakkai-Shi, 34(12), p.1098 - 1107, 1992/12

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Preparation of pure tritium for a liquid D$$_{2}$$/T$$_{2}$$ target of muon-catalyzed fusion experiments

Kudo, Hiroshi; Fujie, Makoto; Tanase, Masakazu; Kato, Mineo; Kurosawa, Kiyoyuki; Sugai, Hiroyuki; Umezawa, Hirokazu; Matsuzaki, Teiichiro*; Nagamine, Kanetada*

Applied Radiation and Isotopes, 43(5), p.577 - 583, 1992/00

no abstracts in English

25 (Records 1-20 displayed on this page)