Title :
Simulation Model for Design of a New Power Supply
Author :
Takayanagi, T. ; Hayashi, Neisei ; Ueno, Tomohiro ; Togashi, T. ; Irie, Y.
Author_Institution :
JAEA/J-PARC, Japan
fDate :
6/1/2012 12:00:00 AM
Abstract :
The simulation model for a new power supply of the injection bump system magnets [1]-[4] of the 3-GeV RCS (Rapid Cycling Synchrotron) in J-PARC (Japan Proton Accelerator Complex) [5], [6] has been constructed. The new power supply requires the reduction of the ripple noise current which will resonate with load and excites a forced beam oscillation at 96 kHz in the injection stage. In order to incorporate the load impedance in the simulation model, the impedances of a feeder line and the bump magnet with a ceramic vacuum chamber [7] inside were measured. The RF shield is formed on the ceramic surface along the beam direction. The results were successfully analysed using the OPERA-3D [8] and the circuit simulation code, Micro-Cap [9], and showed a good agreement. It was found the RF shield of a ceramic chamber has a resonant structure corresponding to 96 kHz.
Keywords :
accelerator magnets; ceramics; equivalent circuits; proton accelerators; pulsed power supplies; synchrotrons; J-PARC; Japan Proton Accelerator Complex; OPERA-3D; RCS; bump magnet; ceramic surface; ceramic vacuum chamber; circuit simulation code; electron volt energy 3 GeV; feeder line; forced beam oscillation; injection bump system magnet; power supply design; rapid cycling synchrotron; Capacitors; Ceramics; Coils; Inductance; Magnetic resonance; Power supplies; Radio frequency; Equivalent circuit; power supply; resonance; ripple noise; simulation model;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2011.2182332
