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Oishi, Kazuki*; Igarashi, Daisuke*; Tatara, Ryoichi*; Kawamura, Yukihiko*; Hiroi, Kosuke; Suzuki, Junichi*; Umegaki, Izumi*; Nishimura, Shoichiro*; Koda, Akihiro*; Komaba, Shinichi*; et al.
Journal of Physics; Conference Series, 2462, p.012048_1 - 012048_5, 2023/03
Times Cited Count：0 Percentile：0.2(Physics, Applied)Kumazoe, Hiroyuki*; Igarashi, Yasuhiko*; Iesari, F.*; Shimizu, Ryota*; Komatsu, Yuya*; Hitosugi, Taro*; Matsumura, Daiju; Saito, Hiroyuki*; Iwamitsu, Kazunori*; Okajima, Toshihiko*; et al.
AIP Advances (Internet), 11(12), p.125013_1 - 125013_5, 2021/12
Times Cited Count：2 Percentile：7.86(Nanoscience & Nanotechnology)Toyama, Takeshi*; Arakawa, Dai*; Hiramatsu, Shigenori*; Igarashi, Susumu*; Lee, S.*; Matsumoto, Hiroshi*; Odagiri, Junichi*; Tejima, Masaki*; Tobiyama, Makoto*; Hashimoto, Yoshinori*; et al.
Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.981 - 983, 2010/05
Experiences of operating BPM's during beam commissioning at the J-PARC MR are reported. The subjects are: (1) bug report, statistics and especially the effect of a beam duct step, (2) position resolution estimation (
30 micrometers with 1 sec averaging), (3) beam based alignment.
Wei, G.; Koseki, Tadashi*; Tomizawa, Masahito*; Igarashi, Susumu*; Ishii, Koji*; Ando, Ainosuke; Takano, Jumpei*; Uota, Masahiko*; Fan, K.*; Hatakeyama, Shuichiro; et al.
Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.3918 - 3920, 2010/05
Sato, Kenichiro; Hiroki, Seiji; Lee, S.*; Hayashi, Naoki; Yamamoto, Kazami; Hiramatsu, Shigenori*; Toyama, Takeshi*; Arakawa, Dai*; Igarashi, Zenei*; Saeki, Riuji
Proceedings of 4th Annual Meeting of Particle Accelerator Society of Japan and 32nd Linear Accelerator Meeting in Japan (CD-ROM), p.297 - 299, 2007/00
At the injection and H0 dump line of J-PARC RCS, different beam monitors have been installed. Main purpose of the beam monitors in the injection line is to generate a beam position and profile to adjust the injection trajectory to the RCS ring. To guide the injected beam precisely is, needless to say, required to reduce the beam loss in the ring. Hence the monitor system is one of the most essential to operate the RCS. At the injection point, there are also some beams that are not match the RCS ring, that is negative and neutral proton beam. H0 dump accepts the unsuitable beams through the H0 dump line. The power limitation of the H0 dump is 4 kW. The monitor system in the dump line is to handle the beam and to monitor the dumped beam power. At the conference these monitor systems will be outlined.
CoO
synthesized by means of ion-exchange methodIgarashi, Dai*; Miyazaki, Yuzuru*; Yubuta, Kunio*; Igawa, Naoki; Kajitani, Tsuyoshi*
no journal, ,
The crystal structures of polycrystalline 
CoO (=Ca, Sr, Ba) have been determined by the neutron powder diffraction and the electron diffraction studies. In the profile of the Ba
CoO, the 002 peak was shifted to lower diffraction angle compared with those of other samples, and the diffraction peak attributed to the superlattice structure was appeared between 002 and 004 peaks. The relationship between the crystal structures and thermoelectrical properties will be discussed in the presentation.
Igarashi, Dai*; Miyazaki, Yuzuru*; Yubuta, Kunio*; Igawa, Naoki; Kajitani, Tsuyoshi*
no journal, ,
Layered cobaltates 
CoO (A = Na, Ca, Sr, Ba) were prepared, and those cation orderings on thermoelectric properties were investigated. It was appeared that those samples had a (3+1) dimensional complexed crystal structure with the cation-disordering on the A layer to the Co layer.
Igarashi, Takahiro; Komatsu, Atsushi; Yamamoto, Yudai*; Fushimi, Koji*; Ueno, Fumiyoshi
no journal, ,
Development and simulation of hydrogen permeation considering solid/solution reaction was conducted. For solid/solution reaction we have considered elementary process of hydrogen evolution reaction, Volmer reaction, Heyrovsky reaction, Tafel reaction and permeation reaction. In the study, we will present results of hydrogen permeation calculation using developed model, and difference of behavior depending on electrode potential and width of specimen.
Igarashi, Takahiro; Komatsu, Atsushi; Yamamoto, Yudai*; Fushimi, Koji*; Ueno, Fumiyoshi
no journal, ,
In order to understand the hydrogen permeation behavior into the steel with solution flow, we developed a simulation model of hydrogen permeation reaction considering solution flow and conducted simulation analyses. We will discuss the effect of frequently controlled (like sine-curve) solution flow velocity on phase difference between cathode current density and permeation current density.
Igarashi, Yudai*; Udaanjargal, U.*; Kokubu, Yoko; Watanabe, Takahiro; Hasegawa, Hitoshi*; Niiden, I.*; Katsuta, Nagayoshi*; Davaadorj, D.*; Hasebe, Noriko*
no journal, ,
Lake Olgoy locates in the "Valley of the Gobi lakes" in southern Mongolia, on the southern slope of Khangai Mountain range. The 10.5 m core was collected from Lake Olgoy in the winter of 2017. This study measured quartz OSL, feldspar IRSL and radiocarbon ages. Quartz OSL ages range in 0.6
0.1 ka to 10.72.5 ka, feldspar IRSL in 1.10.1 ka to 52.95.0 ka and radiocarbon ages in 1.4 ka to 48.6 ka. Based on the comparison of ages by three methods, the age-depth model of the core was proposed. Together with other analytical data from the core, glacier melting events in Khangai Mountains will be discussed.
Igarashi, Yudai*; Udaanjargal, U.*; Kokubu, Yoko; Fujita, Natsuko; Hasegawa, Hitoshi*; Niiden, I.*; Katsuta, Nagayoshi*; Davaadorj, D.*; Hasebe, Noriko*
no journal, ,
Lake Olgoy locates in the "Valley of the Gobi lakes" in southern Mongolia, on the southern slope of Khangai Mountain range. The 10.5m core was collected from Lake Olgoy in the winter of 2017. This study measured quartz OSL, feldspar IRSL and radiocarbon ages. Quartz OSL ages range in 0.60.1 ka to 10.72.5 ka, feldspar IRSL in 1.10.1 ka to 52.95.0 ka and radiocarbon ages in 1.4 ka to 48.6 ka. Based on the comparison of ages by three methods, the age-depth model of the core was proposed. Together with other analytical data from the core, glacier melting events in Khangai Mountains will be discussed.
