The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility

Particle Accumulator Ring

Beam from the linac is next injected into the particle accumulator ring (PAR), which compresses the long pulse of 10-15-nanosecond electrons down to less than 1 nanosecond, and cleans the electron bunch to ensure that stray electrons are driven outside the bunch. The beam is then extracted and delivered to the booster synchrotron.
 
The particle accumulator ring, shown linearly to include all components.
The particle accumulator ring, shown linearly to include all components.

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