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Journal Articles

Rabi-oscillation spectroscopy of the hyperfine structure of muonium atoms

Nishimura, Shoichiro*; Torii, Hiroyuki*; Fukao, Yoshinori*; Ito, Takashi; Iwasaki, Masahiko*; Kanda, Sotaro*; Kawagoe, Kiyotomo*; Kawall, D.*; Kawamura, Naritoshi*; Kurosawa, Noriyuki*; et al.

Physical Review A, 104(2), p.L020801_1 - L020801_6, 2021/08

 Times Cited Count:12 Percentile:84.06(Optics)

Journal Articles

New precise measurements of muonium hyperfine structure at J-PARC MUSE

Strasser, P.*; Abe, Mitsushi*; Aoki, Masaharu*; Choi, S.*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Katsuhiko*; et al.

EPJ Web of Conferences, 198, p.00003_1 - 00003_8, 2019/01

 Times Cited Count:13 Percentile:99.28

Journal Articles

New precise measurement of muonium hyperfine structure interval at J-PARC

Ueno, Yasuhiro*; Aoki, Masaharu*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Katsuhiko*; Ito, Takashi; Iwasaki, Masahiko*; et al.

Hyperfine Interactions, 238(1), p.14_1 - 14_6, 2017/11

 Times Cited Count:3 Percentile:86.59

Journal Articles

New muonium HFS measurements at J-PARC/MUSE

Strasser, P.*; Aoki, Masaharu*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Katsuhiko*; Ito, Takashi; Iwasaki, Masahiko*; et al.

Hyperfine Interactions, 237(1), p.124_1 - 124_9, 2016/12

 Times Cited Count:7 Percentile:91.29

Journal Articles

JSFR design progress related to development of safety design criteria for generation IV sodium-cooled fast reactors, 4; Balance of plant

Chikazawa, Yoshitaka; Kato, Atsushi; Nabeshima, Kunihiko; Otaka, Masahiko; Uzawa, Masayuki*; Ikari, Risako*; Iwasaki, Mikinori*

Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM), 8 Pages, 2015/05

Design study and evaluation for SDC and safety SDG on the BOP of the demonstration JSFR including fuel handling system, power supply system, component cooling water system, building arrangement are reported. For the fuel handling system, enhancement of storage cooling system has been investigated adding diversified cooling systems. For the power supply, existing emergency power supply system has been reinforced and alternative emergency power supply system is added. For the component cooling system and air conditioning, requirements and relation between safety grade components are investigated. Additionally for the component cooling system, design impact when adding decay heat removal system by sea water has been investigated. For reactor building, over view of evaluation on the external events and design policy for distributed arrangement is reported. Those design study and evaluation provides background information of SDC and SDG.

Journal Articles

Status of J-PARC muon science facility at the year of 2005

Miyake, Yasuhiro*; Nishiyama, Kusuo*; Kawamura, Naritoshi*; Makimura, Shunsuke*; Strasser, P.*; Shimomura, Koichiro*; Beveridge, J. L.*; Kadono, Ryosuke*; Fukuchi, Koichi*; Sato, Nobuhiko*; et al.

Physica B; Condensed Matter, 374-375, p.484 - 487, 2006/03

 Times Cited Count:6 Percentile:31.27(Physics, Condensed Matter)

The construction of the Materials and Life Science building was started in the beginning of the fiscal year of 2004. After commissioning of the accelerator and beam transport sections in 2008, muon beams will be available for users in 2009. In this letter, the latest construction status of the J-PARC Muon Science Facility is reported.

Journal Articles

J-PARC muon science facility with use of 3GeV proton beam

Miyake, Yasuhiro*; Kawamura, Naritoshi*; Makimura, Shunsuke*; Strasser, P.*; Shimomura, Koichiro*; Nishiyama, Kusuo*; Beveridge, J. L.*; Kadono, Ryosuke*; Sato, Nobuhiko*; Fukuchi, Koichi*; et al.

Nuclear Physics B; Proceedings Supplements, 149, p.393 - 395, 2005/12

The J-PARC muon science experimental area is planned to be located in the integrated building of the facility for materials and life science study. One muon target will be installed upstream of the neutron target. The main feature of the facility is introduced.

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

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

Journal Articles

X-ray observation of $$alpha$$-sticking phenomena in muon catalyzed fusion for a high density D-T mixture with 30% tritium concentration

Nagamine, Kanetada*; Matsuzaki, Teiichiro*; Ishida, Katsuhiko*; *; *; *; Miyake, Yasuhiro*; *; *; *; et al.

Muon Catal. Fusion, 5-6, p.289 - 295, 1991/00

no abstracts in English

Oral presentation

Development of large acceptance spectrometer for systematic study of kaonic nuclei at J-PARC

Nanamura, Takuya; Hashimoto, Tadashi; Sakuma, Fuminori*; Yamaga, Takumi*; Iwasaki, Masahiko*

no journal, , 

Bound states caused by attractive $$bar{K}N (I=0)$$ interaction, such as $$Lambda(1405)$$ and kaonic nuclei, are interesting systems with strangeness. Many experimental attempts have tried to establish an existence of the lightest kaonic nuclei, "$$K^- pp$$". However, no clear conclusion was reached. Recently, J-PARC E15 collaboration searched for "$$K^- pp$$", using the in-flight $$K^- +^3$$He reaction with an exclusive analysis of the $$Lambda p n$$ final state. By reconstructing not only the $$Lambda p$$ invariant-mass but also momentum transfer to the $$Lambda p$$ system, they definitely showed event concentration interpreted as "$$K^- pp$$" bound state. Moreover, small spatial size of "$$K^- pp$$" is implied. In order to expand this successful experimental method to heavier kaonic nuclei, such as $$bar{K}NNN, bar{K}NNNN, dots$$, and detailed study for fundamental properties of the $$bar{K}NN$$ state, we are developing a new magnetic spectrometer. Because an exclusive analysis requires detections of decay particles from the kaonic nuclei as many as possible, the new spectrometer will have larger solid angle of 93%. To realize it, superconducting solenoid magnet and some detectors, a cylindrical drift chamber and charged particle/neutron counters, are 3-4 meters long. Detection efficiencies for neutron would be improved at least 1.7 times better than current spectrometer. In this presentation, I will talk about designs and development status of the new large acceptance spectrometer.

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