Author: Holmes, J.A.
Paper Title Page
MOPME023 ORBIT Beam Simulation Progress in the 3-GeV Rapid Cycling Synchrotron of J-PARC 521
  • P.K. Saha, H. Harada, H. Hotchi, Y. Shobuda, M. Yamamoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • J.A. Holmes
    ORNL, Oak Ridge, Tennessee, USA
  • S. Kato
    Tohoku University, Graduate School of Science, Sendai, Japan
  We have made a numerous progress for beam simulation in the 3-GeV RCS (Rapid Cycling Synchrotron) of J-PARC (Japan Proton Accelerator Research Complex) by using 3-D particle tracking code, ORBIT. Namely, the TEAPOT lattice file used for ORBIT tracking has been made to give exactly same results to that with SAD model used for the RCS beam commissioning. In addition, time dependent lattice functions of the injection chicane magnets and similar other time dependent lattice imperfections, which are already found to have significant influences on the beam losses in the real machine have also been successfully introduced. At present, time dependent transverse and longitudinal impedances are going to be introduced. That should prove the ORBIT code much more matured for beam simulations in synchrotrons. Latest beam simulation results illustrating these new realistic features are presented.