• A. Adelmann, Y. Ineichen, C. Kraus
  PSI, Villigen
• Y.J. Bi, J.J. Yang
  CIAE, Beijing
• S.J. Russell
  LANL, Los Alamos, New Mexico

OPAL (Object Oriented Parallel Accelerator Library) is a tool for charged-particle optic calculations in accelerator structures and beam lines including 3D space charge, short range wake-fields and 1D coherent synchrotron radiation. Built from first principles as a parallel application, OPAL admits simulations of any scale, from the laptop to the largest High Performance Computing (HPC) clusters available today. Simulations, in particular HPC simulations, form the third pillar of science, complementing theory and experiment. In this paper we present a fast FFT based direct solver and an iterative solver, namely a solver based on an algebraic multigrid preconditioned conjugate gradient method able to handle efficiently exact boundary conditions on complex geometry's. We present with timings up to several thousands of cores. The application of OPAL to the PSI-XFEL project as well as to the ongoing high power cyclotron upgrade will demonstrate OPAL's versatile capabilities. Plans for future developments towards a 3D finite element time domain Maxwell solver for large structures and simulation capabilities for 3D synchrotron radiation will be discussed.

• H. Okuno
  RIKEN Nishina Center, Wako
• A. Adelmann
  PSI, Villigen
• J.J. Yang
  CIAE, Beijing

Since 1997 RIKEN Nishina center has been constructing a next-generation exotic beam facility, RI beam factory (RIBF), based on a powerful heavy ion driver accelerator . Its accelerator complex was successfully commissioned at the end of 2006 and started supplying heavy ion beams in 2007. The four ring cyclotrons (RRC, fRC, IRC and SRC) connected in series accelerate the energy of the heavy ion beams up to 400 MeV/u for the lighter ions such as argon and 345 MeV/u for heavier ions such as uranium. Intensity upgrade plans are under way, including the construction of a new 28 GHz superconducting ECR ion source. The new ECR will take all the succeeding accelerators and beam transport lines to a space charge dominant regime, which should be carefully reconsidered to avoid emittance growth due to space charge forces. Beam dynamics in the low energy cyclotron, RRC was studied by OPAL-cycl a flavor of the OPAL. The simulation results clearly show vortex motions in the isochronous field, resulting in round beam formation in the first 10 turns after the injection point. The possible increase of beam loss at beam extraction will be also discussed in this paper.