Beam parameter measurements for the APS linac system

The linac system is the first part of the injector for the Advanced Photon source (APS) 7-GeV storage ring. The determination of beam emittance, optimization of beam energy and energy spread, focusing, condition, and other parameters is important for positron production and for injection of positrons from the linac into the positron accumulator ring. Diagnostic lines have been incorporated into the linac design to allow measurement of critical beam parameters. Commissioning of the linac system began in October 1993. Beam parameters measurements have been made, and the results are discussed in this paper.