Pulse bending magnet and septum magnet for 3-GeV proton beam transport line

Yamaguchi, Yuji; Kondo, Yasuhiro; Meigo, Shinichiro; Takayanagi, Tomohiro; Fujimori, Hiroshi*; Shinozaki, Shinichi

Proceedings of 22nd Annual Meeting of Particle Accelerator Society of Japan (Internet), p.655 - 660, 2026/03

https://www.pasj.jp/web_publish/pasj2025/proceedings/PDF/THP0/THP061.pdf

Preliminary designs of new bending magnets have been considered for the second target station (TS2) of Materials and Life Science Experimental Facility (MLF), J-PARC. To give a design approach for the bending magnets, several examples of bending magnets, such as a pulse bending magnet and a septum magnet were reviewed. The reviewed magnet specifications compared with requirements for the new bending magnets indicate that the new pulse bending magnet requires a new design idea, while the new septum magnet can be designed based on the previous design of an extraction septum magnet for the 3-GeV synchrotron in J-PARC. The new design idea for the pulse bending magnet and the septum magnet design idea based on the previous one are presented.

Influence of magnetic ordering on quasiparticle spectral functions; Comparison of electronic states of CeCu and CeRuGe

Kawasaki, Ikuto; Fujimori, Shinichi; Yamagami, Hiroshi; Matsuda, Tatsuma*; Onuki, Yoshichika*

Journal of the Physical Society of Japan, 94(8), p.084702_1 - 084702_9, 2025/07

https://doi.org/10.7566/JPSJ.94.084702

SRPES and XPS analysis of activation and deterioration processes for Ti-Zr-V NEG coating

Kamiya, Junichiro; Abe, Kazuhide; Fujimori, Shinichi; Fukuda, Tatsuo; Kobata, Masaaki; Morohashi, Yuko; Tsuda, Yasutaka; Yamada, Ippei; Yoshigoe, Akitaka

e-Journal of Surface Science and Nanotechnology (Internet), 22(4), p.316 - 326, 2024/08

https://doi.org/10.1380/ejssnt.2024-030

The activation and deterioration mechanisms of the Ti-Zr-V non-evaporable getter (NEG) coating have been investigated. Operando analysis of the surface chemical composition change of the Ti-Zr-V coating was performed by the synchrotron radiation photoelectron spectroscopy (SRPES) during the process of raising the sample temperature to 250C, corresponding to the activation process of NEG coating. The surface oxidation process was also characterized by the SRPES during the injection of O_2 gas into the chamber while keeping the sample temperature at 250C, corresponding to the deterioration process of NEG coating, i.e. surface oxidation and oxygen diffusion to the coating interior. The depth profile of the oxidized sample was measured with X-ray photoelectron spectroscopy. The results shows, in the activation process, the surface Zr gets the oxygen from the oxides of Ti and V at the first stage, resulting in the metallic Ti and V on the surface, and the oxygen of the Zr-oxide and/or Zr sub-oxides diffuse to the interior of the coating in the continuous temperature rise, resulting in the metallic Zr on the surface. It is further suggested that the deterioration of the Ti-Zr-V NEG coating means the Zr and secondary Ti are oxidized deep into the coating, resulting in the restriction of the oxygen migration from the NEG compositions on the surface and consequently the lack of surface metallization.

Role of on-site Coulomb interactions in the half-metallic Weyl ferromagnet candidate thin-film CoFeSi

Sumida, Kazuki; Fujita, Yuichi*; Zhou, W.*; Masuda, Keisuke*; Kawasaki, Ikuto; Fujimori, Shinichi; Kimura, Akio*; Sakuraba, Yuya*

Physical Review B, 108(24), p.L241101_1 - L241101_6, 2023/12

https://doi.org/10.1103/PhysRevB.108.L241101

Impact of the Ce states in the electronic structure of the intermediate-valence superconductor CeIr

Fujimori, Shinichi; Kawasaki, Ikuto; Takeda, Yukiharu; Yamagami, Hiroshi; Sasabe, Norimasa*; Sato, Yoshiki*; Shimizu, Yusei*; Nakamura, Ai*; Maruya, A.*; Homma, Yoshiya*; et al.

Electronic Structure (Internet), 5(4), p.045009_1 - 045009_7, 2023/11

https://doi.org/10.1088/2516-1075/ad0a3d

Quasiparticle state in 4 localized ferromagnet CeRuGe studied by soft X-ray photoemission spectroscopy

Kawasaki, Ikuto; Fujimori, Shinichi; Takeda, Yukiharu; Yamagami, Hiroshi; Onuki, Yoshichika*

Journal of the Physical Society of Japan, 92(6), p.064709_1 - 064709_8, 2023/06

https://doi.org/10.7566/JPSJ.92.064709

Electronic structure of ThPdAl; Impact of the U states on the electronic structure of UPdAl

Fujimori, Shinichi; Takeda, Yukiharu; Yamagami, Hiroshi; Pospil, J.*; Yamamoto, Etsuji; Haga, Yoshinori

Physical Review B, 105(11), p.115128_1 - 115128_6, 2022/03

https://doi.org/10.1103/PhysRevB.105.115128

Electronic structure of the intermediate-valence compound EuNiP studied by soft X-ray photoemission spectroscopy

Kawasaki, Ikuto; Kobata, Masaaki; Fujimori, Shinichi; Takeda, Yukiharu; Yamagami, Hiroshi; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika*

Physical Review B, 104(16), p.165124_1 - 165124_8, 2021/10

https://doi.org/10.1103/PhysRevB.104.165124

Alternation of magnetic anisotropy accompanied by metal-insulator transition in strained ultrathin manganite heterostructures

Kobayashi, Masaki*; Anh, L. D.*; Suzuki, Masahiro*; Kaneta-Takada, Shingo*; Takeda, Yukiharu; Fujimori, Shinichi; Shibata, Goro*; Tanaka, Arata*; Tanaka, Masaaki*; Oya, Shinobu*; et al.

Physical Review Applied (Internet), 15(6), p.064019_1 - 064019_10, 2021/06

https://doi.org/10.1103/PhysRevApplied.15.064019

Soft X-ray irradiation induced metallization of layered TiNCl

Kataoka, Noriyuki*; Tanaka, Masashi*; Hosoda, Wataru*; Taniguchi, Takumi*; Fujimori, Shinichi; Wakita, Takanori*; Muraoka, Yuji*; Yokoya, Takashi*

Journal of Physics; Condensed Matter, 33(3), p.035501_1 - 035501_6, 2021/01

https://doi.org/10.1088/1361-648X/abbbc3