Abstract:
At the Advanced Light Source there are several projects
being proposed that will require high field insertion
devices. It is important that these devices do not
significantly impact the performance of the machine. In
particular they should not degrade the beam lifetime or
injection efficiency. It is known that high field devices
with large field roll off can impact the beam lifetime. It
is therefore important to model the effect of the insertion
devices including both transverse and longitudinal field
roll off. In this paper we present the result of tracking
studies using an explicit symplectic integrator with both
transverse and longitudinal field roll off. The simulations
show where sufficiently large field roll off will impact the
beam lifetime.