Status of development on LaB filament arc-driven multi-cusp ion source for iBNCT

Shibata, Takanori*; Takagi, Akira*; Ikegami, Kiyoshi*; Sugimura, Takashi*; Nammo, Kesao*; Naito, Fujio*; Kobayashi, Hitoshi*; Kurihara, Toshikazu*; Honda, Yosuke*; Sato, Masaharu*; et al.

Proceedings of 15th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.385 - 387, 2018/10

-ray spectroscopy of hypernuclei; Recent results and prospect at J-PARC

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

https://doi.org/10.7566/JPSCP.17.011004

High statistics scattering experiment using high intensity pion beams at J-PARC

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

https://doi.org/10.7566/JPSCP.17.041002

Missing-mass spectroscopy with the Li reaction to search for H

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

AA2017-0465.pdf:1.08MB

https://doi.org/10.1103/PhysRevC.96.014005

Study of the -nucleus interaction by using the C(K, p) reaction at J-PARC

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

https://doi.org/10.7566/JPSCP.13.020007

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.

Long distant microscope observation of radiation damage (blistering); Laser reflection microscope

Kurihara, Toshikazu*; Kobayashi, Hitoshi*; Sugimura, Takashi*; Hirano, Koichiro

Proceedings of 13th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.814 - 816, 2016/11

http://www.pasj.jp/web_publish/pasj2016/proceedings/PDF/TUP0/TUP003.pdf

A problem of irradiation damage is the one observed in each part of a component of particle accelerators; accelerating tubs, scrapers, monitors and neutron targets. In-situ observation by an actual proton accelerator is made our last target. We observed the radiation damage of the various materials used by particle accelerators. From the distant place the target which is in the high radiation area, we propose the method to get information from the catoptric light from the target using a laser as a light source. A principle of this observation method as well as generating process of blisterings and limitation of this method will be reported.

Development of single-sided silicon detectors in the emulsion-hybrid system at J-PARC

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

https://doi.org/10.7566/JPSCP.8.021008

J-PARC E27 experiment to search for a bound state

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

https://doi.org/10.7566/JPSCP.8.021020

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/.

Measurement of the spin-flip value in hypernuclei

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

https://doi.org/10.7566/JPSCP.8.022013

Development of a GEM-based TPC for H-dibaryon search at J-PARC

Sako, Hiroyuki; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Sato, Susumu; Sugimura, Hitoshi

Proceedings of Science (Internet), 213, p.300_1 - 300_4, 2015/07

https://doi.org/10.22323/1.213.0300

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.