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Yee-Rendon, B.; Kondo, Yasuhiro; Maekawa, Fujio; Meigo, Shinichiro; Tamura, Jun; Cicek, E.*
Proceedings of 12th International Particle Accelerator Conference (IPAC 21) (Internet), p.793 - 795, 2021/08
The Five-cell Elliptical Superconducting Radio-Frequency Cavities (SRFC) provide the final acceleration in the JAEA-ADS linac (from 600 MeV to 1.5 GeV); thus, their performance is essential for the success of the JAEA-ADS project. After their optimization of the cavity geometry to achieve a high-acceleration gradient with lower electromagnetic peaks, the next step in the R&D strategy is the accurate estimation of beam-cavity effects which can affect the performance of the cavities. To this end, multipacting studies were developed to investigate its effect in the cavity operation regimen and find countermeasures. The results of this study will help in the development of the SRFC models and in the consolidation of the JAEA-ADS project.
Yee-Rendon, B.; Kondo, Yasuhiro; Maekawa, Fujio; Meigo, Shinichiro; Tamura, Jun
Journal of Physics; Conference Series, 1350(1), p.012197_1 - 012197_7, 2019/12
Yee-Rendon, B.; Kondo, Yasuhiro; Maekawa, Fujio; Meigo, Shinichiro; Tamura, Jun
Journal of Physics; Conference Series, 1350(1), p.012198_1 - 012198_6, 2019/12
Nagai, Ryoji; Hajima, Ryoichi; Sawamura, Masaru; Nishimori, Nobuyuki; Kikuzawa, Nobuhiro; Minehara, Eisuke
Nuclear Instruments and Methods in Physics Research A, 528(1-2), p.231 - 234, 2004/08
Times Cited Count：2 Percentile：18.72(Instruments & Instrumentation)An optical resonator geometry of JAERI ERL-FEL is optimized to ensure the high-power operation. Efficiency of the FEL strongly depends on performance of the optical resonator such as an output efficiency and interaction mode volume. The resonator geometry is optimized by maxmization of the output efficiency and minimization of the interaction mode volume. The output efficiency and the interaction mode volume of the optical resonator is calculated by a simulation code using Fox-Li procedure. To search rapidly with various parameters, the simulation code is improved utilizing Fast-Fourie-Transform.
Fukuda, Mitsuhiro; Okumura, Susumu; Kurashima, Satoshi; Miyawaki, Nobumasa; Ishii, Yasuyuki; Saito, Yuichi; Mizuhashi, Kiyoshi; Agematsu, Takashi; Chiba, Atsuya; Sakai, Takuro; et al.
Proceedings of 1st Annual Meeting of Particle Accelerator Society of Japan and 29th Linear Accelerator Meeting in Japan, p.643 - 645, 2004/08
A superconducting AVF cyclotron with a bending limit of 900 MeV and a focusing limit of 300 MeV is being designed to meet the requirements for the research in materials science and biotechnology at TIARA facility of JAERI. The spiral-sector shape of the cyclotron magnet has been optimized for acceleration of a 300 MeV proton to produce sufficient focusing forces in an extraction region. An energy range of the superconducting AVF cyclotron overlaps with that of the present K110 JAERI AVF cyclotron. Characteristics of a resonator for the superconducting AVF cyclotron have been investigated using the MAFIA code. An acceleration voltage in a frequency range of 24 to 64 MHz can be produced by the resonator with a 
/2 excitation mode.
Kabumoto, Hiroshi; Takeuchi, Suehiro; Matsuda, Makoto; Nakanoya, Takamitsu
Dai-17-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.135 - 137, 2004/06
no abstracts in English
Nagai, Ryoji; Hajima, Ryoichi; Kikuzawa, Nobuhiro; Minehara, Eisuke; Nishimori, Nobuyuki; Sawamura, Masaru
Proceedings of 26th International Free Electron Laser Conference (FEL 2004) and 11th FEL Users Workshop (CD-ROM), p.255 - 257, 2004/00
no abstracts in English
Kurashima, Satoshi; Miyawaki, Nobumasa; Fukuda, Mitsuhiro; Okumura, Susumu; Nara, Takayuki; Agematsu, Takashi; Ishibori, Ikuo; Yoshida, Kenichi; Nakamura, Yoshiteru; Arakawa, Kazuo
JAERI-Review 2003-033, TIARA Annual Report 2002, p.310 - 311, 2003/11
The JAERI AVF cyclotron provides a variety of ion beams especially for the research in biotechnology and materials science. Several cyclotron technologies such as cocktail beam acceleration, a uniform irradiation in a wide area and beam pulsation have been developed so far. A flat-top acceleration system for the JAERI AVF cyclotron has been designed to minimize the energy spread mainly for a microbeam production. The flat-top acceleration using fundamental and fifth-harmonic frequencies for an acceleration voltage is an excellent technique to reduce the energy spread.
Takeuchi, Suehiro; Matsuda, Makoto; Ishizaki, Nobuhiro; Tayama, Hidekazu; Iijima, Akihiko*; Yoshida, Takahiro*
Proceeding of 10th Workshop on RF Superconductivity (SRF 2001), p.591 - 593, 2001/00
no abstracts in English
M.A.Chernogubovsky*; Sugimoto, Masayoshi
Nuclear Instruments and Methods in Physics Research A, 428(2-3), p.263 - 270, 1999/00
Times Cited Count：0 Percentile：0.01(Instruments & Instrumentation)no abstracts in English
M.A.Chernogubovsky*; Sugimoto, Masayoshi
JAERI-Research 98-041, 29 Pages, 1998/08
JAERI-Research-98-041.pdf:1.32MB
no abstracts in English
Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; Minehara, Eisuke
Free Electron Laser and Its Application in ASIA, p.195 - 199, 1997/00
no abstracts in English
M.A.Chernogubovsky*; Sugimoto, Masayoshi
JAERI-Research 96-064, 9 Pages, 1996/12
JAERI-Research-96-064.pdf:0.64MB
no abstracts in English
*; Minehara, Eisuke; *
JAERI-M 91-074, 28 Pages, 1991/05
no abstracts in English
Minehara, Eisuke; *; *; *
J. Supercond., 3(3), p.277 - 280, 1990/00
no abstracts in English
