ABSTRACT
I. lntroduction Collective beam dynamics will play a major role in determining beam losses and intensity instability thresholds in high intensity rings such as the PSR at Los Alamos, the Booster at Fermilab, the AGS Booster, the Spallation Neutron Source (SNS), and future proton drivers. The details of these processes are complicated, and a good understanding of the underlying physics will require careful computer modeling. ln order to stndy the dynamics of high intensity rings, a task essential to the SNS project [I], the macroparticle tracking computer code ORBrT [2,3] has been developed. The simulation of collective processes, including space charge and wake forces, requires three-dimensional modeling of the beam self and wall interactions. ln many cases, the resulting simulations may require tracking millions of interacting particles for thousands of turns, which constitutes a legitimate high-performance computing problem. ln order to meet the need for credible simulations of collective processes in high intensity rings, we are developing and implementing a parallel version of the ORBIT code.
