Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Kenji Shinoe"'
Autor:
Hiroshi Sakai, Enrico Cenni, Kazuhiro Enami, Takaaki Furuya, Masaru Sawamura, Kenji Shinoe, Kensei Umemori
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 2, p 022002 (2019)
Field emission is one of the most serious issues in the degradation of superconducting cavity performance. However, surveying field emission sources during the cavity performance test (called the “vertical test”) and cryomodule operation is diffi
Externí odkaz:
https://doaj.org/article/b9f61a3ae9514a378c670171f0d3d40f
Autor:
Hiroshi Sakai, Masami Fujisawa, Kensuke Iida, Isao Ito, Hirofumi Kudo, Norio Nakamura, Kenji Shinoe, Takeo Tanaka, Hitoshi Hayano, Masao Kuriki, Toshiya Muto
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 4, p 042801 (2007)
We describe the improvements of a Fresnel zone plate (FZP) beam-profile monitor, which is being developed at the KEK-ATF damping ring to measure ultralow emittance electron-beam profiles. This monitor, which is designed to have a submicrometer spatia
Externí odkaz:
https://doaj.org/article/bde5879ee10145a38933ee07265ed296
Autor:
Yasunori Tanimoto, K. Endo, Ryota Takai, H. Matsushita, Eiji Kako, Kentaro Harada, Kenji Hosoyama, Kota Nakanishi, Seiji Asaoka, Shuichi Noguchi, Ken Watanabe, Feng Qiu, Yuuji Kojima, Enrico Cenni, Kazufumi Hara, Kaiichi Haga, Masao Kuriki, Yosuke Honda, Hiromitsu Nakajima, Teruya Honma, Yukinori Kobayashi, Shinichiro Michizono, Ryoichi Hajima, Kazuhiro Enami, Tatsuya Kume, Shigeki Fukuda, Hirotaka Nakai, K. Umemori, Masaru Sawamura, Kotaro Satoh, M. Tadano, Mitsuo Akemoto, Hidenori Sagehashi, Hiroshi Matsumura, Hiroshi Kawata, Takako Miura, Shinichi Sasaki, Toshio Shishido, Takaaki Furuya, Masato Egi, Tateru Takenaka, Hiroshi Sakai, Kenji Shinoe, Y. Kondou, Tohru Honda, Miho Shimada, Hiroaki Katagiri, Takashi Nogami, Akira Ueda, Takashi Uchiyama, Norio Nakamura, Tsukasa Miyajima, Dai Arakawa, Shinya Nagahashi, Shogo Sakanaka, Takashi Obina, Takeshi Takahashi, Olga Tanaka, Masahiro Yamamoto, Kazuyuki Nigorikawa, Nobuyuki Nishimori, Ryoji Nagai
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 877:197-219
Energy-recovery linacs (ERLs) are promising for advanced synchrotron light sources, high-power free electron lasers (FELs), high-brightness gamma-ray sources , and electron–ion colliders. To demonstrate the critical technology of ERL-based light so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1952effdd5de9bc5fae9a38c16bee59
https://doi.org/10.1016/j.nima.2017.08.051
https://doi.org/10.1016/j.nima.2017.08.051
Autor:
K. Umemori, Masaru Sawamura, Kenji Shinoe, Kazuhiro Enami, Hiroshi Sakai, Takaaki Furuya, Enrico Cenni
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 2, p 022002 (2019)
Field emission is one of the most serious issues in the degradation of superconducting cavity performance. However, surveying field emission sources during the cavity performance test (called the ``vertical test'') and cryomodule operation is difficu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37ed19ba3516ce922a0ed7989166c70c
https://doi.org/10.1103/physrevaccelbeams.22.022002
https://doi.org/10.1103/physrevaccelbeams.22.022002
Autor:
Hiroshi Matsumura, Kaiichi Haga, Masaru Sawamura, Akihiro Toyoda, Hajime Nakamura, Shogo Sakanaka, Hiroshi Sakai, Takaaki Furuya, K. Umemori, Kenji Shinoe, Enrico Cenni, Ken-ichi Hozumi, Kazuhiro Enami
Publikováno v:
EPJ Web of Conferences, Vol 153, p 07011 (2017)
The field emission electron currents from the main superconducting cavities (Cavities #3 and #4) of compact ERL at KEK, Japan, were estimated indirectly from photon dose rates measured around the cavities and on the roof of the compact ERL room. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d959d2534745ffdcf02c07376405e37
https://doaj.org/article/89e2ac6cc1de4bb6b7302c10d4b501e8
https://doaj.org/article/89e2ac6cc1de4bb6b7302c10d4b501e8
Autor:
Hideyuki Sakai, Yoshiyuki Amemiya, Masaharu Nomura, K. Iida, Koichi Nakayama, N. Aoki, Kenji Shinoe, Norio Nakamura, Tadashi Koseki, Masami Fujisawa, Hiroyuki Takaki, Y. Kamiya, Hitoshi Hayano
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 506:41-49
We present a non-destructive and real-time beam profile monitor using Fresnel zone plates (FZPs) and the measurement of an electron-beam size with this monitor in the KEK–Accelerator Test Facility (ATF) damping ring. The monitor system has the stru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efde9909814317b695c38b818165aecb
https://doi.org/10.1016/s0168-9002(03)01392-5
https://doi.org/10.1016/s0168-9002(03)01392-5
Autor:
Yukihide Kamiya, Hirofumi Kudo, Tadashi Koseki, Hiroyuki Takaki, Kenji Shinoe, Norio Nakamura, Toshiya Nagatsuka
Publikováno v:
Review of Scientific Instruments. 66:1916-1919
Recently, a global feedback of beam position was switched on at SOR‐RING of Tokyo University. At a low beam current, the vertical orbit drift was suppressed almost within a few μm and the horizontal orbit drift within several μm. On the other han
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52319afc788b3ef97f653d2ba65e45e9
https://doi.org/10.1063/1.1145823
https://doi.org/10.1063/1.1145823
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 13, Iss 2, p 022003 (2010)
An eccentric-fluted beam pipe is proposed to damp quadrupole modes in a cavity. The eccentric flutes act as a mode converter from quadrupole to dipole. Optimizing the parameters of the eccentric-fluted beam pipe allows sufficient damping of both dege
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a073c237dc1a6170f4088606d4e941e7
https://doaj.org/article/7451a5921f424d3ca40fa1cd8b5123dd
https://doaj.org/article/7451a5921f424d3ca40fa1cd8b5123dd
Autor:
S. Sakanaka, Kenji Shinoe, Tadayuki Takahashi, Takaaki Furuya, K. Umemori, Masaru Sawamura, Hiroshi Sakai, Tsuyoshi Suwada
Publikováno v:
2007 IEEE Particle Accelerator Conference (PAC).
An eccentric-fluted beam pipe was proposed to damp quadrupole modes. The eccentric-flute acts as a mode converter from quadrupole to dipole. Optimized parameters permit to damp both degenerate modes of the quadrupole with the eccentric-flute. Externa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df30c34196059b17a2bf8926d0ae3760
https://doi.org/10.1109/pac.2007.4440969
https://doi.org/10.1109/pac.2007.4440969
Autor:
M. Kobayashi, N. Nakamura, Hideyuki Sakai, Hiroyuki Takaki, T. Shibuya, Hirofumi Kudo, I. Ito, Kenji Shinoe
Publikováno v:
Proceedings of the 2005 Particle Accelerator Conference.
We describe the development of the copper coated chamber, which is suitable for the 3rd generation light sources. This chamber aims to reduce the resistive-wall impedance[1]. However, this coating might affect the ultra-high vacuum condition worse. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::518cfaf4de9c71324cd65eae89ba4bd3
https://doi.org/10.1109/pac.2005.1591210
https://doi.org/10.1109/pac.2005.1591210