hbs_lat es war en en en en en fr en war en war nl war en lt nl en en en en ko en ro en war en sv en lt nl nl en en nl en en en en
LINAC08 - List of Authors (Naito, F.)
A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z
Operating Experience of te J-PARC Linac
K. Hasegawa, H. Asano, T. Ito, T. Kobayashi, Y. Kondo, H. Oguri, A. Ueno
S. Anami, Z. Fang, Y. Fukui, K. Ikegami, M. Kawamura, F. Naito, K. Nanmo, H. Tanaka, S. Yamaguchi
E. Chishiro, T. Hori, H. Suzuki, M. Yamazaki
Y. Namekawa, K. Ohkoshi
J-PARC, KEK & JAEA, Ibaraki-ken
Te J-PARC (Japan Proton Accelerator Research Complex) linac consists of an RFQ, a Drift Tube Linac and a Separated-type Drift Tube Linac. Te beam commissioning of te linac started in November 2006 and 181 MeV acceleration was successfully achieved in January 2007. Te linac has delivered beams to te 3 GeV Rapid Cycling Synchrotron for its commissioning, and then, te subsequent 50 GeV Main Ring Synchrotron and te neutron target commissioning. Te linac uses 20 units of 324 MHz klystrons. As of May, 2008, te average number of filament hours exceeds 5,000 without serious troubles. Te operating experience of te linac will be described in this paper.
Improvement in te ACS Cavity Design for te J-PARC Linac Energy Upgrade
H. Ao, K. Hasegawa, K. Hirano, T. Morishita, A. Ueno
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
M. Ikegami, F. Naito
J-PARC, KEK & JAEA, Ibaraki-ken
Te ACS (Annular-ring Coupled Structure) cavities were under development for te J-PARC Linac from 190 MeV to 400 MeV. We have fixed te cavity specification, taking into account te results of te high-power conditioning and te fabrication experience. Te mass production of te ACS with a tight time schedule is now an issue, since te user community strongly requests te beam power upgrade as early as possible. Therefore, te design and te fabrication process of te ACS cavity have been reexamined on te basis of te experience, stored during te course of te fabrication and te tuning of te prototype ACS tanks. Here, we also discussed about te key issues on te mass production with a manufacturer. Te cavity shape, that required complicated machining, was simplified to some extent, while te frequency tuning strategy was reconsidered to reduce te production period. Te paper describes these recent activities on te ACS development.