Commissioning of the Slc Injector*

For every cycle of the SLC, the injector is required to launch two electron bunches and a single positron bunch into their rsspective emittance damping rings. Each bunch is to have a population of 7.5 x 10” particles/bunch, an energy of 1.21 GeV, and a full width energy spread of less than 2%. The electron beams are produced from a thermionic cathode, bunched, and accelerated to about 200 MeV. Positrons are injected after electrons at the 200 MeV point. The three bunches, spaced by approximately 60 ns, are subsequently accelerated to the damping ring energy within. a single RF pulse. As of September 1986, all of the injector hardware had been installed and tested. Single -electron bunches were being produced, stabilized with respect to energy characteristics, and injected into the damping rings. Commissioning of two electron bunch operation is currently in progress. Three bunch running should be commissioned by early 1987 and the SLC injector is expected to be operational by April _ 1987. This paper will report on the hardware and software developments necessary for the injector. The operational status of the entire system will be discussed.