The linac and booster RF systems for a dedicated injector for SPEAR

A 120 MeV, 2856 MHz, traveling wave linear accelerator (linac), with a microwave gun, alpha magnet, and chopper, has been built at the Stanford Synchrotron Radiation Laboratory (SSRL) as a preinjector for and along with a 3 GeV, 358.54 MHz, booster synchrotron ring. The resulting injector will be available on demand to fill the Stanford Positron-Electron Accelerator Ring (SPEAR), which is a storage ring now dedicated to synchrotron light production. A description is given of the injector's two separate and different frequency RF systems. Synchronization of the two, non-harmonic systems is achieved through the linac's chopper. Some of the interesting mechanical and electrical details are discussed and the operating characteristics of the linac and ring RF are highlighted. >