Title :
Kicker Magnet System of the RCS in J-PARC
Author :
Kamiya, J. ; Takayanagi, T. ; Kawakubo, T. ; Murasugi, S. ; Nakamura, E.
Author_Institution :
Japan Atomic Energy Res. Inst., Nakagun
fDate :
6/1/2006 12:00:00 AM
Abstract :
Kicker magnets are installed in the extraction section of the RCS (Rapid Cycling Synchrotron) in J-PARC (Japan Proton Accelerator Research Complex) facility. They extract a 3 GeV proton beam and inject it into a downstream beam transport line at a repetition rate of 25 Hz. The power supply is mainly composed of the charging unit, the pulse forming network, and thyratrons as switching device. The maximum charging voltage is 80 kV. The kicker magnet is a distributed (transmission line) twin-C type. The circuit parameters are designed to have the 10 Omega characteristic impedance. The magnets are installed in vacuum chambers to prevent voltage breakdown. In order to accept 1 MW beam power, strict conditions are imposed on the kicker system. In the first part of this paper, we give an outline of the RCS extraction kicker system. Next, we report the specifications and performance of the power source and magnet. In addition, we report the measurements of the vacuum performance and magnetic field
Keywords :
accelerator magnets; particle beam extraction; proton accelerators; synchrotrons; thyratrons; 25 Hz; 3 GeV proton beam; J-PARC; Japan Proton Accelerator Research Complex facility; RCS; Rapid Cycling Synchrotron; charging unit; circuit parameters; distributed twin-C type transmission line; downstream beam transport line; extraction section; kicker magnet system; maximum charging voltage; power supply; pulse forming network; thyratrons; vacuum chambers; Distributed parameter circuits; Magnetic field measurement; Particle beam injection; Particle beams; Power transmission lines; Proton accelerators; Pulsed power supplies; Synchrotrons; Thyratrons; Voltage; J-PARC; RCS; kicker magnet; thyratron; vacuum;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2006.873265
