Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Kazunori Akai"'
Autor:
Kazunori Akai
Publikováno v:
Physical Review Accelerators and Beams, Vol 26, Iss 11, p 112001 (2023)
This study investigated an unknown instability in the crab-crossing scheme, which is caused by the interaction between beam loading on crab cavities and the coherent beam-beam force at the interaction point (IP). We developed an analysis method by fo
Externí odkaz:
https://doaj.org/article/67efa313da0c40b9836684cdcd9f80fc
Stability analysis of rf accelerating mode with feedback loops under heavy beam loading in SuperKEKB
Autor:
Kazunori Akai
Publikováno v:
Physical Review Accelerators and Beams, Vol 25, Iss 10, p 102002 (2022)
In SuperKEKB high-current beam operation, achieving the stability of the zero mode associated with the accelerating mode of the rf system is an important concern because of heavy beam loading. The issue is a more serious problem in the high-energy ri
Externí odkaz:
https://doaj.org/article/91cab6c793194de3bce443ae00d4b1a4
Autor:
Tetsuya Kobayashi, Kazunori Akai
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 6, p 062001 (2016)
Bunch phase shift along the train due to a bunch gap transient is a concern in high-current colliders. In KEKB operation, the measured phase shift along the train agreed well with a simulation and a simple analytical form in most part of the train. H
Externí odkaz:
https://doaj.org/article/a7ce6a10573a429aaa119af1ac126a20
Autor:
Tetsuo Abe, Tatsuya Kageyama, Kazunori Akai, Kiyokazu Ebihara, Hiroshi Sakai, Yasunao Takeuchi
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 9, Iss 6, p 062002 (2006)
Multipactoring phenomena in a radio frequency (rf) input coupler, which could cause serious problems during accelerator operation, are described based on electrodynamics with the superposition state of the input and reflected waves in the coupler. Si
Externí odkaz:
https://doaj.org/article/ef5711005e8f4a8fa452c4ae39369e55
Autor:
Xiangyu Zhou, S. Nakamura, Michiru Nishiwaki, Takashi Mori, Toshiyuki Oki, Katsunobu Oide, H. Sugimura, Hiroshi Kaji, Masafumi Tawada, Hitomi Ikeda, Toshihiro Mimashi, R. Ueki, Yusuke Suetsugu, Shinji Terui, Demin Zhou, S. Enomoto, Yasushi Arimoto, Haruyo Koiso, G. Mitsuka, Zhanguo Zong, T. Miyajima, R. Yang, Akio Morita, Xudong Wang, Tatsuro Nakamura, Yoshihiro Funakoshi, Kyo Shibata, Kazuro Furukawa, Mitsuo Kikuchi, Kazuhito Ohmi, T. Yoshimoto, Kota Kodama, Hitoshi Fukuma, S. Yoshimoto, Hiroshi Sugimoto, Ken Watanabe, Takuya Kamitani, M. A. Rehman, Kazunori Akai, T. Kobayashi, Kazumi Egawa, Kota Nakanishi, Tetsuo Abe, Takuya Ishibashi, S. Ogasawara, Norihito Ohuchi, Mika Masuzawa, Yukiyoshi Ohnishi, Yuji Seimiya, Makoto Tobiyama, Fusashi Miyahara, T. Kawamoto, Naoko Iida, S. Iwabuchi
Publikováno v:
The European Physical Journal Plus. 136
SuperKEKB is an electron–positron asymmetric-energy double-ring collider, which was built in Japan. It has been operated to explore new phenomena in B-meson decays. Hence, extremely higher luminosity is required. A collision scheme of low emittance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6336e30a9c67deb923e1c73ac06f63b
https://doi.org/10.1140/epjp/s13360-021-01979-8
https://doi.org/10.1140/epjp/s13360-021-01979-8
Autor:
Kazunori Akai
Publikováno v:
Proceedings of The 39th International Conference on High Energy Physics — PoS(ICHEP2018).
SuperKEKB, a 7-GeV electron -- 4-GeV positron double-ring collider, was constructed by upgrading KEKB to significantly push the luminosity frontier toward more detailed experiments seeking new discoveries in physics beyond the Standard Model. The des
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::153e7bd2a0fddde5830e25ad39c1ce5a
https://doi.org/10.22323/1.340.0701
https://doi.org/10.22323/1.340.0701
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 953:163007
SuperKEKB is an electron–positron circular collider aiming to achieve unprecedented luminosity by using a large beam current and a new collision method. The longitudinal coupled-bunch instabilities caused by the accelerating mode of cavities will b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::839a30fa00184ababea7e2642ee703f7
https://doi.org/10.1016/j.nima.2019.163007
https://doi.org/10.1016/j.nima.2019.163007
SuperKEKB, a 7 GeV electron - 4 GeV positron double-ring collider, is constructed by upgrading KEKB in order to seek new physics beyond the Standard Model. The design luminosity of SuperKEKB is 8 x 10^35 /cm^2 /s - 40 times higher than that achieved
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2636bd51db45388d5a4b5cb6afe5c213
Autor:
Kazunori Akai, T. Kobayashi
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 6, p 062001 (2016)
Bunch phase shift along the train due to a bunch gap transient is a concern in high-current colliders. In KEKB operation, the measured phase shift along the train agreed well with a simulation and a simple analytical form in most part of the train. H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::413f39a403a147246bf240350fd34ecb
https://doi.org/10.1103/physrevaccelbeams.19.062001
https://doi.org/10.1103/physrevaccelbeams.19.062001
Autor:
Minoru Yoshida, Shigenori Hiramatsu, E. Perevedentsev, Shigeki Kato, Katsunobu Oide, Naoko Iida, Eiji Kikutani, Tatsuro Nakamura, Masafumi Tawada, Toshihiro Matsumoto, Mitsuo Kikuchi, Y. Wu, Masaaki Suetake, Kazuhito Ohmi, S. Uno, Noboru Yamamoto, Tsuyoshi Suwada, J. Haba, Toshiyuki Mitsuhashi, Takuya Kamitani, S. Yoshimoto, S. Kamada, Atsushi Enomoto, Kenji Hosoyama, Kazunori Akai, Shin-ichi Kurokawa, Kazuro Furukawa, Hitomi Ikeda, Yukiyoshi Ohnishi, Frank Zimmermann, N. Akasaka, J.W. Flanagan, Makoto Tobiyama, Yujiro Ogawa, Yoshihiro Funakoshi, Mika Masuzawa, Norihito Ohuchi, T. Ieiri, Satoshi Ohsawa, Masakazu Yoshioka, H. Fukuma, Toshihiro Mimashi, Yusuke Suetsugu, Haruyo Koiso, Masaki Tejima, Kotaro Satoh, Takaaki Furuya
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 499:191-227
KEKB has been operated since December, 1998, to deliver BB pairs for a physics detector. In this paper,we describe the commissioning procedure of KEKB.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d42b80ec95627d88b6d055dbcf2714d4
https://doi.org/10.1016/s0168-9002(02)01788-6
https://doi.org/10.1016/s0168-9002(02)01788-6