Performance of the Advanced Photon Source (APS) linear accelerator

A 2856-MHz S-band, electron-positron linear accelerator (linac) is the injector and source of particles for the APS. The linac is operated 24 hours per day, with 405-MeV electrons to support commissioning of the other APS accelerators, and with positrons or electrons to support linac studies. It produces electrons with energies up to 655 MeV or positrons with energies up to the design energy of 450 MeV.