OPERATING EXPERIENCE WITH POLARIZED ELECTRON-GUN AT SLAC

During the two years of operation of the SLAC Polarized Electron Gun (PEGGY), the electron intensity delivered to the target has increased from 7 x 10/sup 7/ e/sup -//pulse to 1 x 10/sup 9/ e/sup -//pulse. The polarization is 0.85 with no measurable degradation caused by acceleration through the linear accelerator. The predominant cause of downtime is replenishment of lithium, which now averages 43 hours. The lifetime of a lithium load is about 175 hours.