A Possible modification of ceramic chambers in the injection area at the RCS in J-PARC

Shobuda, Yoshihiro; Kamiya, Junichiro; Takayanagi, Tomohiro; Horino, Koki*; Ueno, Tomoaki*; Yanagibashi, Toru*; Kotoku, Hirofumi*

Proceedings of 12th International Particle Accelerator Conference (IPAC 21) (Internet), p.3205 - 3208, 2021/08

https://doi.org/10.18429/JACoW-IPAC2021-WEPAB245

At the injection area of the RCS in J-PARC, the interaction between the copper stripes (RF-shields) on the ceramic chambers and the external magnetic fields modulatesthe magnetic fields in the chamber, causing beam losses for a special tune. A ceramic chamber spirally covered by the stripes is a candidate to mitigate the modulations. In this report, we numerically and experimentally investigate how the interaction is suppressed, while sustaining the beam impedance enhancement within tolerable at the RCS.

Deformation analysis of reinforced concrete using neutron imaging technique

Koyama, Taku*; Ueno, Kazuki*; Sekine, Mariko*; Matsumoto, Yoshihiro*; Kai, Tetsuya; Shinohara, Takenao; Iikura, Hiroshi; Suzuki, Hiroshi; Kanematsu, Manabu*

Materials Research Proceedings, Vol.4, p.155 - 160, 2018/05

https://doi.org/10.21741/9781945291678-24

Breeding of new cultivar "Aladdin 2" through stepwise improvements of cv. "Jimba" using ion beam re-irradiation

Ueno, Keiichiro*; Nagayoshi, Sanetaka*; Imakiire, Seiro*; Koriyama, Keisaku*; Minami, Tomohito*; Tanaka, Atsushi; Hase, Yoshihiro; Matsumoto, Toshikazu*

Engeigaku Kenkyu, 12(3), p.245 - 254, 2013/09

https://doi.org/10.2503/hrj.12.245

"Jimba" is a leading variety of white-flower chrysanthemum in Japan, although "Jimba" develops many axillary buds and also shows delayed flowering under a low temperature condition. Previously, we succeeded to produce new chrysanthemum variety "Aladdin" and "Imagine" that have a lesser number of axillary buds by ion beam irradiation. However, these varieties still show delayed flowering under a low temperature condition. In this study, we examined the effect of re-irradiation ofthese mutants by ion beams in improving flowering trait. The cultured leaves of "Aladdin" were irradiated with carbon ions and the regenerated plants were screened for the mutants that flowers earlier than the parental variety under a low temperature condition. Finally, we succeeded to produce new chrysanthemum variety "Aladdin 2" that develops a few axillary buds and shows early flowering traits. Thus, we demonstrated that the two important agronomic traits can be introduced by ion beam irradiation in a stepwise manner. The knowledge obtained in this study may be applicable for improving many kinds of plants.

Ion beam breeding of chrysanthemum cultivar "Sanyo-ohgon"

Shirao, Tsukasa*; Ueno, Keiichiro*; Minami, Tomohito*; Tanaka, Akira*; Imakiire, Seiro*; Hase, Yoshihiro; Tanaka, Atsushi

JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 74, 2008/03

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2007-060.pdf

no abstracts in English

Polarization transfer in the O() reaction at forward angles and structure of the spin-dipole resonances

Kawabata, Takahiro*; Ishikawa, Takatsugu*; Ito, M.*; Nakamura, M.*; Sakaguchi, Harutaka*; Takeda, H.*; Taki, T.*; Uchida, Makoto*; Yasuda, Yusuke*; Yosoi, Masaru*; et al.

Physical Review C, 65(6), p.064316_1 - 064316_12, 2002/06

https://doi.org/10.1103/PhysRevC.65.064316

no abstracts in English

Thin ice target for O (p,p') experiment

Kawabata, Takahiro*; Akimune, Hidetoshi*; Fujimura, Hisako*; Fujita, Hirohiko*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Hara, Keigo*; Hatanaka, Kichiji*; Hosono, K.*; Ishikawa, Takatsugu*; et al.

Nuclear Instruments and Methods in Physics Research A, 459(1-2), p.171 - 176, 2001/02

https://doi.org/10.1016/S0168-9002(00)00992-X

no abstracts in English

The Dose of ion beams suitable for the creation of useful sugarcane mutants

Tojima, Futoshi*; Yasuniwa, Makoto*; Shirao, Tsukasa*; Oe, Masakazu*; Ueno, Keiichiro*; Tanaka, Atsushi; Hase, Yoshihiro

no journal, , 

no abstracts in English

The Optimum dose of ion beam irradiation to generate useful mutants for sugarcane growth

Tojima, Futoshi*; Takenoshita, Yoshihisa*; Nagatani, Takeshi*; Shirao, Tsukasa*; Oe, Masakazu*; Ueno, Keiichiro*; Tanaka, Atsushi; Hase, Yoshihiro

no journal, , 

no abstracts in English

Evaluation of long-term integrity of the fuel assembly removed from the spent fuel pool, 3; Investigation of chloride ion transport phenomenon across the screw-gap between Zircaloy upper plug and stainless nut immersed in dilute artificial seawater containing Cl ion

Sekio, Yoshihiro; Maeda, Koji; Yamagata, Ichiro; Ueno, Fumiyoshi

no journal, , 

The upper plug of a fuel rod used for the spent fuel pool (SFP) of Unit 4 in Fukushima Daiichi Nuclear Power Plant (1F) consists of Zircaloy-2 bolt and SUS304L nut, and it forms the screw-gap structure. Therefore, when seawater constituents stays behind in this gap structure by a seawater injection after the accident, crevice corrosion might occurs. This may have an influence on the integrity of a fuel assembly stored in common pool. It is necessary to estimate transport phenomenon of seawater constituents across the screw-gap structure. In this study, the transport phenomenon of seawater constituents was investigated using especially radioactive tracer Cl-36 (Cl) by simulating the immersion condition experienced for the SFP of Unit 4 in 1F. From the results, it was qualitatively and quantitatively confirmed that the Clion was removed from the screw-gap structure by water quality improvement (the decrease of Cl concentration in test solution).

Present status of the energy-resolved neutron imaging system, RADEN, in J-PARC

Shinohara, Takenao; Kai, Tetsuya; Oikawa, Kenichi; Hiroi, Kosuke; Su, Y. H.; Segawa, Mariko; Nakatani, Takeshi; Hayashida, Hirotoshi*; Matsumoto, Yoshihiro*; Parker, J. D.*; et al.

no journal, ,