Abstract:
We present the recent status and performance of
the Duke Free Electron Laser (FEL) storage ring. We report a
large transverse and energy aperture observed in the storage
ring. We describe the consequences of this large aperture on
the operation of the storage ring. Several unusual phenomena
are reported in this paper, including large amplitude transverse
multibunch coherent oscillations (Saturn rings) and beam capture
from outside the RF separatrix. We also present the established
operation modes for the storage ring, including energy ramping,
working point tuning, and different bunch-mode operations to
optimize the ring as a synchrotron light source, an FEL, and a
gamma-ray source. Finally, we summarize the achieved storage
ring parameters since its first operation in November 1994.
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