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Hajima, Ryoichi; Minehara, Eisuke
Proceedings of 27th Linear Accelerator Meeting in Japan, p.169 - 171, 2002/08
We propose a full-DC injector for a future ERL light source. The injector consists of a DC accelerator (Dynamitron type), a magnetic merger and a buncher-booster. We have found that the injector can generate electron bunches required for ERL light sources and RF coupler power of the buncher booster is also decreased by partial energy-recovery.
Hajima, Ryoichi; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; Shizuma, Toshiyuki; Minehara, Eisuke
Proceedings of 27th Linear Accelerator Meeting in Japan, p.97 - 99, 2002/08
An energy-recovery linac (ERL) has been developed at the JAERI superconducting FEL. Whole the ERL system has been completed and the beam comitioning and FEL experiments are ongoing, now. We report recent results of our study on the ERL, and future R&D plans towards a 10kW FE based on the ERL technologies.
Minehara, Eisuke; Yamauchi, Toshihiko; Sugimoto, Masayoshi; Sawamura, Masaru; Hajima, Ryoichi; Nagai, Ryoji; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; Shizuma, Toshiyuki
Proceedings of 27th Linear Accelerator Meeting in Japan, p.21 - 23, 2002/08
The JAERI superconducting rf linac-based free-electron laser(FEL) has been modified to recover the beam energy after the lasing utilizing a 360 degree recirculating loop and other components. Recent progress on the energy recovery experiments and future plans of the JAERI superconducting rf linac-based FELs will be reported and discussed briefly.
Nagai, Ryoji; Hajima, Ryoichi; Sawamura, Masaru; Nishimori, Nobuyuki; Kikuzawa, Nobuhiro; Minehara, Eisuke
Proceedings of 27th Linear Accelerator Meeting in Japan, p.264 - 266, 2002/08
no abstracts in English
Hori, Toshihiko*; Ito, Takashi; Chishiro, Etsuji; Izumi, Keisuke*; Yamazaki, Masayoshi*; Watanabe, Kazuhiko*; Takasaki, Eiichi*; Hasegawa, Kazuo; Yoshikawa, Hiroshi
Proceedings of 27th Linear Accelerator Meeting in Japan, p.255 - 257, 2002/08
no abstracts in English
Sawamura, Masaru; Hajima, Ryoichi; Iwashita, Yoshihisa*; Nagai, Ryoji; Nishimori, Nobuyuki; Kikuzawa, Nobuhiro; Minehara, Eisuke
Proceedings of 27th Linear Accelerator Meeting in Japan, p.275 - 277, 2002/08
no abstracts in English
Yamazaki, Masayoshi*; Chishiro, Etsuji; Suganuma, Kazuaki; Kobayashi, Tetsuya; Hori, Toshihiko*; Suzuki, Hiroyuki*; Hasegawa, Kazuo; Yoshikawa, Hiroshi
Proceedings of 27th Linear Accelerator Meeting in Japan, p.296 - 298, 2002/08
no abstracts in English
Sakaki, Hironao
Proceedings of 27th Linear Accelerator Meeting in Japan, p.85 - 87, 2002/08
no abstracts in English
Kobayashi, Tetsuya; Chishiro, Etsuji; Anami, Shozo*; Yamaguchi, Seiya*; Michizono, Shinichiro*
Proceedings of 27th Linear Accelerator Meeting in Japan, p.302 - 304, 2002/08
For the high-intensity proton linac of the KEK/JAERI joint project, the error of the accelerating field must be within 
1 degree in phase and 1% in amplitude. Thus high phase stability is required to the RF reference distribution system. The 12 MHz RF reference is converted to optical signal and distributed to 50 low level RF control systems of klystron and solid-state amplifier stations through the optical fiber links (E/O, O/E and optical fibers). The phase-stabilized optical fiber (PSOF) will be used as an optical transfer line. Characteristics of the optical components (E/O, O/E, PSOF) are measured. The performance of the conventional E/O and O/E is not enough for the requirements. New optimized E/O and O/E for this linac are going to be produced. The total stability of the RF reference transfer system with new optical components will be evaluated.
Ao, Hiroyuki; Hayashizaki, Noriyosu*
Proceedings of 27th Linear Accelerator Meeting in Japan, p.195 - 197, 2002/08
The fabrication status of Annular Coupled Structure (ACS) which was adopt for the 200-400MeV part of the injector linac is presented. The RF test of half-scale aluminum model is proceeding for high-power model fabrication. This result shows that the ACS structure has sensitivity to the RF contact with cavity and short-plates for RF measurement, and that the flatness of contact surface should be finished carefully. We also mention the error distribution of half-scale model frequencies and the RF properties about real scale aluminum models of buncher cavities.
Ito, Takashi
Proceedings of 27th Linear Accelerator Meeting in Japan, p.69 - 73, 2002/08
no abstracts in English
Kando, Masaki; Kotaki, Hideyuki; Kondo, Shuji; Kanazawa, Shuhei; Masuda, Shinichi; Homma, Takayuki; Nakajima, Kazuhisa
Proceedings of 27th Linear Accelerator Meeting in Japan, p.148 - 150, 2002/08
no abstracts in English