Title :
Performance of the SLC polarized electron source and injector with the SLAC 3 km linac configured for fixed target experiments
Author :
Yeremian, A.D. ; Alley, R.K. ; Clendenin, J.E. ; Frisch, J.C. ; Garden, C.L. ; Klaisner, L.A. ; Kulikov, A.V. ; Miller, R.H. ; Prescott, C.Y. ; Saez, P.J. ; Schultz, D.C. ; Tang, H. ; Turner, J.L. ; Woods, M.B. ; Zolotorev, M.
Author_Institution :
Stanford Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The SLC polarized electron source (PES) can be modified to produce μsec-long pulses for injection into the unSLEDed SLAC 3 km linac, with a duty factor considerably higher than for SLC. Such beams are desirable for fixed target experiments at SLAC requiring polarized electron beams of up to 50 mA within an energy spread of 0.5%, at energies of up to 26 GeV. During the fall of 1992, the SLAC linac was operated continuously for two months unSLEDed with the PES dye laser (715 nm) modified to produce a 1 μec pulse at 120 Hz. An AlGaAs photocathode was installed in the electron gun to achieve 40% polarization, and a prebuncher was added to the SLC injector to improve capture for long pulse beams. We discuss the performance of the polarized electron beam for long pulse operation
Keywords :
electron beams; electron sources; particle beam diagnostics; 1 mus; 120 Hz; 26 GeV; AlGaAs; AlGaAs photocathode; SLC polarized electron source; duty factor; dye laser; injector; long pulse operation; prebuncher; unSLEDed; Cathodes; Electron beams; Electron sources; Laser beams; Linear accelerators; Linear particle accelerator; Monitoring; Optical pulses; Polarization; Space vector pulse width modulation;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309539
