• J.E. Dusatko, S. Allison, J. Browne, P. Krejcik
  SLAC, Menlo Park, California

The Linac Coherent Light Source requires precision timing trigger signals for various accelerator diagnostics and controls at SLAC-NAL. A new timing system has been developed that meets these requirements. This system is based on COTS hardware with a mixture of custom-designed units. An added challenge has been the requirement that the LCLS Timing System must co-exist and “know” about the existing SLC Timing System. This paper describes the architecture, construction and performance of the LCLS timing event system.