Tracking in Circulator Accelerators with Parallel Computing
PIC tracking of a particle beam in an accelerator can be done using
a "herd" of representative macroparticles randomly generated. Particles
are propagated through the accelerator lattice using transfer maps,
consisting of matrices in the six dimensional phase space, and higher
order transformations. For high intensity beams, the interactions inside
the beam and between macroparticles and accelerator chamber walls become
important and in some cases are the dominating effects, leading to the
formation of halo. Computing can be very demanding and time consuming.
Another case involving intensive computing is tracking in an accelerator
while the optical properties of the machine itself are being varied.
In both cases parallel computing is the best practical approach. We
present results of parallel simulation for three problems: (1) comparison
of Poisson solvers, (2) tracking with the code ORBIT of an intense proton
beam in the Oak Ridge Spallation Neutron Source 1 GeV proton accumulator
ring, and (3) orbit and spin tracking with the code SPINK of the polarized
proton beams in the Brookhaven RHIC collider.