SLAC, Menlo Park, California, USA
The SPEAR3 light source at SSRL was commissioned in 2004. Since that time the machine has undergone a continual program of improvements that has led to a lowering of the ring emittance, improved injection efficiencies, and the development of specialized operational modes. The effective use of beam diagnostics enabled these improvements to be tested and verified prior to their implementation. To optimize injection we needed to measure the beam position, size, shape, and arrival time of our injected bunch as well as beam losses in the ring. To test new lattices we used these diagnostics to characterize the non-linear resonances in the ring and therefore find operating points that maximized beam stability and lifetime. In this paper we discuss the electrical and optical instruments as well as the experimental methods we used to make these measurements.
