Abstract:
A variety of insertion devices (IDs), wigglers and
undu-lators, linearly or elliptically polarized, are widely
used as high brightness radiation sources at the modern
light source rings. Long and high-field wigglers have also
been pro-posed as the main source of radiation damping at
next gen-eration damping rings. As a result, it becomes
increasingly important to understand the impact of IDs on
the charged particle dynamics in the storage ring. In this
paper, we report our recent development of a general
explicit sym-plectic model for IDs with the paraxial ray
approximation. High-order explicit symplectic integrators
are developed to study real-world insertion devices with a
number of wig-gler harmonics and arbitrary polarizations.