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Okawa, Tomohiro*; Ao, Hiroyuki; Ikegami, Masanori*
Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.251 - 253, 2005/07
L3BT is a beam transport line from J-PARC (Japan Proton Accelerator Research Complex) linac to the succeeding 3-GeV RCS (Rapid Cycling Synchrotron). Recently, the positions of the debunchers in L3BT are revised to optimize the momentum spread at the RCS injection. In this paper, results of the beam simulation of the L3BT with the new debuncher locations are presented. The construction status of the L3BT is also presented in brief.
Nakamura, Yoshiteru; Nara, Takayuki; Agematsu, Takashi; Ishibori, Ikuo; Kurashima, Satoshi; Fukuda, Mitsuhiro; Okumura, Susumu; Yokota, Wataru; Yoshida, Kenichi; Miyawaki, Nobumasa; et al.
Proceedings of 17th International Conference on Cyclotrons and Their Applications (CYCLOTRONS 2004), p.157 - 159, 2005/00
The AVF cyclotron system at JAERI Takasaki has been smoothly operated for 13 years since 1991. This system continues to deliver various ion species with very frequent alterations of operational conditions. In order to provide a heavy ion beam with energy spread of 0.02 % required for microbeam production, we have developed a flat-top acceleration system, an additional buncher driven by saw-tooth wave, and improved the central region of the cyclotron. An old gradient corrector of passive type was replaced by a new gradient corrector with an active coil inside to obtain complete matching between the trunk beam line and extraction trajectory from the cyclotron. A compact ion source with a set of movable permanent magnet was designed to produce mainly light ions, which will be replaced the existing multi-cusp ion source in future.
Okawa, Tomohiro*; Ikegami, Masanori*
Proceedings of 9th European Particle Accelerator Conference (EPAC 2004), p.1342 - 1344, 2004/00
The accelerators for the High-Intensity Proton Accelerator Facility Project, J-PARC, consist of a 180-MeV linac, a 3-GeV RCS (Rapid Cycling Synchrotorn), and a 50-GeV MR (Main Ring). L3BT is a beam transport line from the linac to the RCS. To meet the requirement for the beam loss minimization, the L3BT does not only connect the linac to the 3GeV RCS, but also modifies the linac beam to be acceptable for the RCS. The required beam parameters at the injection point of the RCS are momentum spread 
0.1
and transverse emittance 4
mm
mrad. To achieve these beam qualities, the L3BT should have following functions: momentum compaction, transverse halo scraping and beam diagnostics. In this paper, results of the design and beam simulation of the L3BT are presented.
X.D.Zheng*; ; Maebara, Sunao; ; ; ; Yakayama, Ken*; ; ; Ogawa, Masao*; et al.
Nuclear Instruments and Methods in Physics Research A, 407(1-3), p.198 - 202, 1998/00
Times Cited Count：1 Percentile：21.85(Instruments & Instrumentation)no abstracts in English
Yokota, Wataru; Fukuda, Mitsuhiro; Arakawa, Kazuo; Nakamura, Yoshiteru; Nara, Takayuki; Agematsu, Takashi; Okumura, Susumu; Ishibori, Ikuo; Tachikawa, T.*; ; et al.
Proceedings of 13th International Conference on Cyclotrons and Their Applications, p.581 - 584, 1993/00
no abstracts in English
Tachikawa, T.*; ; ; ; Nakamura, Yoshiteru; Yokota, Wataru; Fukuda, Mitsuhiro; Kamiya, Tomihiro; Agematsu, Takashi; Nara, Takayuki; et al.
Proceedings of the International Conference on Evolution in Beam Applications, p.270 - 274, 1992/00
no abstracts in English
