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Koike, Takeshi*; Hasegawa, Shoichi; Hayakawa, Shuhei*; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tamura, Hirokazu; et al.
AIP Conference Proceedings 2130, p.020011_1 - 020011_9, 2019/07
Times Cited Count:2 Percentile:73.22(Physics, Nuclear)Yang, S. B.*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Tanida, Kiyoshi; et al.
Physical Review Letters, 120(13), p.132505_1 - 132505_5, 2018/03
Times Cited Count:8 Percentile:54.37(Physics, Multidisciplinary)Tamura, Hirokazu*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; et al.
JPS Conference Proceedings (Internet), 17, p.011004_1 - 011004_11, 2017/07
Nakagawa, Manami*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; et al.
JPS Conference Proceedings (Internet), 17, p.012009_1 - 012009_4, 2017/07
Miwa, Koji*; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Imai, Kenichi; Kondo, Yasuhiro; Naruki, Megumi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; et al.
JPS Conference Proceedings (Internet), 17, p.041002_1 - 041002_6, 2017/07
Yang, S. B.*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; et al.
JPS Conference Proceedings (Internet), 17, p.012004_1 - 012004_4, 2017/07
Honda, Ryotaro*; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Nagamiya, Shoji; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; et al.
Physical Review C, 96(1), p.014005_1 - 014005_23, 2017/07
Times Cited Count:14 Percentile:73.79(Physics, Nuclear)Kondo, Yasuhiro; Asano, Hiroyuki*; Chishiro, Etsuji; Hirano, Koichiro; Ishiyama, Tatsuya; Ito, Takashi; Kawane, Yusuke; Kikuzawa, Nobuhiro; Meigo, Shinichiro; Miura, Akihiko; et al.
Proceedings of 28th International Linear Accelerator Conference (LINAC 2016) (Internet), p.298 - 300, 2017/05
We have constructed a linac for development of various accelerator components at J-PARC. The ion source is same as the J-PARC linac's, and the RFQ is a used one in the J-PARC linac. The beam energy is 3 MeV and nominal beam current is 30 mA. The accelerator has been already commissioned, and the first development program, laser-charge-exchange experiment for the transmutation experimental facility, has been started. In this paper, present status of this 3-MeV linac is presented.
Nagae, Tomofumi*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tanida, Kiyoshi; et al.
Proceedings of Science (Internet), 281, p.038_1 - 038_7, 2017/05
Ichikawa, Yudai; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Imai, Kenichi; Kimbara, Shinji; Nakada, Yoshiyuki; Sako, Hiroyuki; Sato, Susumu; et al.
JPS Conference Proceedings (Internet), 13, p.020007_1 - 020007_5, 2017/02
An interaction between K and nucleus is studied by using the X-ray from the kaonic atoms for a long time. However, it is difficult to determine the K-nucleus interaction by using only kaonic-atoms data because the value of shift and width of the X-ray depend not only the potential depth but also the type of theoretical model. Thus, we study the -nucleus interaction by comparing an observed missing-mass spectrum of the C(K, p) reaction with the DWIA calculation. Such a study has already reported from KEK-E548 experiment. However, their experiment is not enough to determine these interaction because they were pointed out about the experimental condition. Thus, we performed the further experiment to take the real spectrum of C(K, p) reaction at J-PARC.
Sako, Hiroyuki; Harada, Hiroyuki; Sakaguchi, Takao*; Chujo, Tatsuya*; Esumi, Shinichi*; Gunji, Taku*; Hasegawa, Shoichi; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; et al.
Nuclear Physics A, 956, p.850 - 853, 2016/12
Times Cited Count:12 Percentile:65.66(Physics, Nuclear)Hirano, Koichiro; Asano, Hiroyuki; Ishiyama, Tatsuya; Ito, Takashi; Okoshi, Kiyonori; Oguri, Hidetomo; Kondo, Yasuhiro; Kawane, Yusuke; Kikuzawa, Nobuhiro; Sato, Yoshikatsu; et al.
Proceedings of 13th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.310 - 313, 2016/11
We have used a beam scraper with the incident angle of 65deg to reduce the beam power deposition density in the MEBT between a 324 MHz RFQ and a 50-MeV DTL of the J-PARC linac. The 65 scraper was irradiated by the H beam up to particle number of 1.47E22. We observed a lot of surface projections with several hundred micrometers high in the beam irradiation damage on the scraper by using the laser microscope. In order to study the limits of scrapers, we constructed a new 3 MeV linac at J-PARC. We will conduct the scraper irradiation test at the end of this year.
Yamamoto, T. O.*; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Kimbara, Shinji; Nakada, Yoshiyuki; Sako, Hiroyuki; et al.
Physical Review Letters, 115(22), p.222501_1 - 222501_5, 2015/11
Times Cited Count:67 Percentile:92.61(Physics, Multidisciplinary)Ichikawa, Yudai; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tanida, Kiyoshi; et al.
JPS Conference Proceedings (Internet), 8, p.021020_1 - 021020_7, 2015/09
We have carried out an experimental search for the simplest kaonic nucleus, , by using the reaction at = 1.69 GeV/. The differential cross section of this reaction with covering a wide missing-mass range from the production threshold to the (1405)/(1385) region has been measured for the first time. The inclusive missing-mass shape of the and production region was understood with a simple quasi-free picture except for an enhancement at 2.13 GeV/ due to a cusp. An obtained peak attributed to production was significantly shifted to the low mass side compared with the simulation by -24 MeV/.
Takahashi, Tomonori*; Ekawa, Hiroyuki; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tanida, Kiyoshi; et al.
JPS Conference Proceedings (Internet), 8, p.022011_1 - 022011_6, 2015/09
Yamamoto, T. O.*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; et al.
JPS Conference Proceedings (Internet), 8, p.021017_1 - 021017_6, 2015/09
Sasaki, Yuki*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; et al.
JPS Conference Proceedings (Internet), 8, p.022013_1 - 022013_4, 2015/09
Han, Y.*; Hasegawa, Shoichi; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tanida, Kiyoshi; J-PARC E42 Collaboration*; 23 of others*
JPS Conference Proceedings (Internet), 8, p.021002_1 - 021002_5, 2015/09
Lee, J. Y.*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tanida, Kiyoshi; et al.
JPS Conference Proceedings (Internet), 8, p.021008_1 - 021008_6, 2015/09
Sako, Hiroyuki; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Sato, Susumu; Sugimura, Hitoshi
Proceedings of Science (Internet), 213, p.300_1 - 300_4, 2015/07
We develop a TPC (Time Projection Chamber) using GEM (Gas Electron Multiplier) to search for H-dibaryon at J-PARC E42 experiment. We evaluated performance of a small prototype TPC. We performed a long term operation test for one month which is similar term as E42. We suppressed hit position distortion with 0.2 mm due to ion backflow.