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Okumura, Yoshikazu
Proceedings of 11th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.194 - 198, 2014/10
International Fusion Materials Irradiation Facility (IFMIF) is one of the major facilities in fusion program to irradiate and characterize the fusion materials under intense neutron field. Under the framework of Broader Approach (BA) agreement between Japan and Euratom, Engineering Validation and Engineering Design Activities (EVEDA) launched in 2007 in Japan to validate the key technologies to realize IFMIF. The most critical technology to realize IFMIF is two set of linear accelerators each producing 125mA/CW deuterium ion beams up to 40MeV. The prototype accelerator being developed in EVEDA consists of an injector, a RFQ accelerator, and a superconducting linac, whose target is to produce 125mA/CW deuterium ion beams up to 9MeV. The injector has been delivered to International Fusion Energy Research Center (IFERC) in Rokkasho, Japan, where all the accelerator components will be assembled and operated to validate the accelerator technologies required for IFMIF.
Arakawa, Kazuo
Genshiryoku Nenkan 2006-Nen Ban, p.125 - 126, 2005/10
no abstracts in English
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
Minehara, Eisuke
Proceedings of ARTA 2004, p.75 - 76, 2004/00
The JAERI superconducting RF linac-based free-electron laser has successfully produced the tunable, 6% or more efficient, a few hundreds femtoseconds, and 2.34kW high average power laser light firstly. Here we discuss and report what kinds of the accelerator and free-electron laser technologies we need in order to make a large-scale and popular industrial FEL applications possible, to increase the average power drastically, to realize the JAERI FEL to be a non-ionizing radiation generating device, and to miniaturize the device volume and weight. In the discussion as a specific example of the large-scale and popular industrial applications, we discuss the nuclear energy related example, and the required technologies of the accelerator and non-accelerator related.
Arakawa, Kazuo
Genshiryoku Nenkan 2004-Nen Ban, p.196 - 197, 2003/11
no abstracts in English
Hajima, Ryoichi; Minehara, Eisuke
Nuclear Instruments and Methods in Physics Research A, 507(1-2), p.141 - 145, 2003/07
Times Cited Count：4 Percentile：33.69(Instruments & Instrumentation)An energy-recovery linac (ERL) for a high-power FEL has been developed at JAERI (Japan Atomic Energy Research Institute), and a research program towards 10 kW FEL is under progress. In the JAERI-ERL, an electron beam after the FEL interaction is transported through a triple-bend arc and re-injected to the main superconducting module, where the electrons are decelerated down to 2 MeV, same as the injection energy. Since the electron beam has large energy-spread introduced by FEL interaction, special attention should be paid to both transverse and longitudinal phase space manipulation through the return-arc and the deceleration path. We present the results of beam dynamics simulations coupled with a 1-D FEL code, and discuss the limitation of FEL extraction efficiency determined by phase space acceptance of the return path. The design of a beam dump at 2MeV is also described.
Hajima, Ryoichi; Shizuma, Toshiyuki; Sawamura, Masaru; Nagai, Ryoji; Nishimori, Nobuyuki; Kikuzawa, Nobuhiro; Minehara, Eisuke
Nuclear Instruments and Methods in Physics Research A, 507(1-2), p.115 - 119, 2003/07
Times Cited Count：24 Percentile：81.86(Instruments & Instrumentation)An energy-recovery linac (ERL) for a high-power FEL has been designed and constructed at JAERI (Japan Atomic Energy Research Institute). The construction of the ERL was completed and the first energy-recovery operation was demonstrated at February, 2002. The parameters of the ERL are : injection energy of 2.5MeV, recirculating energy of 17MeV, average current of 5mA, bunch repetition of 10MHz, RF frequency of 500MHz, and so on. The injector will be reinforced to generate 40mA beam current for 10kW FEL. We present the design overview and the performance of the JAERI-ERL. Future plans towards 10kW FEL are also presented.
Sawamura, Masaru; Hajima, Ryoichi; Kikuzawa, Nobuhiro; Minehara, Eisuke; Nagai, Ryoji; Nishimori, Nobuyuki
Proceedings of 2003 Particle Accelerator Conference (PAC 2003) (CD-ROM), p.3446 - 3448, 2003/00
no abstracts in English
Ouchi, Nobuo; Akaoka, Nobuo*; Asano, Hiroyuki*; Chishiro, Etsuji; Hasegawa, Kazuo; Takeda, Osamu*; Yoshikawa, Hiroshi; Matsuoka, Masanori*; Otani, Toshihiro*; Kako, Eiji*; et al.
Proceedings of 21st International Linear Accelerator Conference, p.488 - 490, 2003/00
Development of a superconducting proton linac is in progress in collaboration with KEK. In order to demonstrate cavity performance and to study stable accelerating field in a pulsed operation, a 600MHz superconducting cryomodule has been fabricated. The cryomodule includes two 5-cell superconducting cavities of 
=0.6 and is designed to perform 2K operation. Cold tests of the cryomodule have been performed at the temperature of 4K and 2K. In the tests, heat leak to the cavities, loaded quality factors, tuning sensitivities, frequency shifts against helium vessel pressure and Lorentz force detuning of the cavities were measured. Most of the measured data agreed with their design values, except for the heat leak and the Lorentz force detuning. As the preliminary horizontal test of the cryomodule, high power RF test has been also performed, where the surface peak fields of 10 and 16 MV/m were achieved in CW and pulsed operation, respectively. Now, the optimization of the RF control system is in progress to demonstrate stable accelerating field in a pulsed operation.
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
Shizuma, Toshiyuki; Hajima, Ryoichi; Minehara, Eisuke
Nuclear Instruments and Methods in Physics Research A, 475(1-3), p.569 - 573, 2001/12
Times Cited Count：1 Percentile：12.96(Instruments & Instrumentation)no abstracts in English
Hasegawa, Kazuo; Kato, Takao*; JAERI-KEK Superconduction Proton Linac Development Team
JAERI-Conf 2001-002, p.185 - 190, 2001/03
no abstracts in English
Hasegawa, Kazuo; Ouchi, Nobuo; Mukugi, Ken*
KEK Proceedings 2000-23, p.31 - 33, 2001/02
no abstracts in English
Mizumoto, Motoharu
KEK Proceedings 2000-23, p.1 - 3, 2001/02
no abstracts in English
Hasegawa, Kazuo; Mizumoto, Motoharu; Ouchi, Nobuo; Noguchi, Shuichi*
KEK Proceedings 99-25, p.28 - 32, 2000/02
no abstracts in English
Mizumoto, Motoharu; Kusano, Joichi; Hasegawa, Kazuo; Ouchi, Nobuo; Oguri, Hidetomo; Ichihara, Masahiro; Tomisawa, Tetsuo; Ito, Takashi; Chishiro, Etsuji*; Ikegami, Masanori*; et al.
KEK Proceedings 99-25, p.3 - 5, 2000/02
no abstracts in English
Hasegawa, Kazuo; Kato, Takao*; KEK/JAERI Joint Project Acceleator Team
Proceedings of 20th International Linac Conference (CD-ROM), 1 Pages, 2000/00
no abstracts in English
Ouchi, Nobuo; Mizumoto, Motoharu; Kusano, Joichi; Chishiro, Etsuji; Hasegawa, Kazuo; Akaoka, Nobuo*; Saito, Kenji*; Noguchi, Shuichi*; Kako, Eiji*; Inoue, Hitoshi*; et al.
Proceedings of 20th International Linac Conference (CD-ROM), 1 Pages, 2000/00
no abstracts in English
Kusano, Joichi; Ouchi, Nobuo; Akaoka, Nobuo*; Takeda, O.*; Matsuoka, Masanori*; Saito, Kenji*; Noguchi, Shuichi*; Inoue, Hitoshi*; Mukugi, Ken*; Mizumoto, Motoharu
Proceedings of 25th Linear Accelerator Meeting in Japan, p.317 - 319, 2000/00
no abstracts in English
Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Sugimoto, Masayoshi; Nishimori, Nobuyuki; Minehara, Eisuke
Review of Scientific Instruments, 70(10), p.3865 - 3868, 1999/00
Times Cited Count：4 Percentile：38.44(Instruments & Instrumentation)no abstracts in English
