Design of RCS magnets for J-PARC 3-GeV synchrotron

Author

Tani, N. ; Adachi, T. ; Igarashi, S. ; Watanabe, Y. ; Someya, H. ; Sato, H. ; Kishiro, J.

Author_Institution

Japan Atomic Energy Res. Institiute, Ibaraki, Japan

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

409

Lastpage

412

Abstract

The 3-GeV synchrotron proposed in the JAERI/KEK Joint Project (J-PARC) is a rapid-cycling synchrotron (RCS), which accelerates a high-intensity proton beam from 400 MeV to 3 GeV at a repetition rate of 25 Hz. The 3-GeV synchrotron is used to produce pulsed spallation neutrons and muons. It also works as an injector for a 50-GeV synchrotron. The 3-GeV synchrotron consists of 24 dipole magnets, 60 quadrupole magnets, 18 sextupole magnets and 52 steering magnets. Since the magnets for the 3-GeV synchrotron are required to have a large aperture in order to realize the large beam power of 1 MW, one of the serious issue is a large fringe field at a pole end comparing to usual synchrotron magnet. Therefore, we carefully estimated not only the magnetic field but also the effect of multi-pole components in the fringing field. In this paper, we would report the results of the field calculation and mechanical design of RCS magnets.

Keywords

accelerator magnets; proton accelerators; proton beams; synchrotrons; 0.400 to 3 GeV; 1 MW; 3 GeV; 50 GeV; JAERI-KEK Joint Project; beam power; dipole magnets; fringe field; magnetic field; multipole components; muons; proton beam; pulsed spallation neutrons; quadrupole magnets; rapid-cycling synchrotron; sextupole magnets; steering magnets; synchrotron magnet; Accelerator magnets; Apertures; Magnetic fields; Magnetic resonance; Mesons; Neutrons; Particle beams; Power supplies; Proton accelerators; Synchrotrons; High intensity accelerator; J-PARC; magnet; rapid-cycling synchrotron;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.829683

Filename

1324820