Abstract:
Single particle beam dynamics in the storage ring can be
significantly influenced by long and strong field insertion
devices, such as FEL wigglers in the light source ring and
damping wigglers in the next generation damping ring. An
explicit symplectic integrator for arbitrary wiggler field
has been developed and used for detailed beam dynamics
studies for storage rings with wigglers. A proper dynamics
model is critical for uncovering the details of the stable
phase space region with varying diffusion rates computed
from the particle tracking data using the frequency analysis
technique NAFF. We focus our studies on the influence of a
24m long variably polarized OK-5 FEL system to be installed
in the Duke storage ring in 2003. Particle tracking
simulations are performed for various operation modes of the
FEL wigglers. Lattice parameters are then adjusted
accordingly to optimize the dynamic aperture for a
particular mode of FEL operation.