Injection envelope matching in storage rings

The shape and size of the transverse phase space injected into a storage ring can be deduced from turn-by-turn measurements of the transient behavior of the beam envelope in the ring. Envelope oscillations at 2/spl times/ the /spl beta/-tron frequency indicate the presence of a /spl beta/-mismatch, while envelope oscillations at the /spl beta/-tron frequency are the signature of a dispersion function mismatch. Experiments in injection optimization using synchrotron radiation imaging of the beam and a fast-gated camera at the SLC damping rings are reported.