Observation of a charge limit for photocathode electron guns

Conference · Tue Dec 01 04:00:00 EST 1992

OSTI ID:6851651

Woods, M; Clendenin, J; Frisch, J; Kulikov, A; Saez, P; Schultz, D; Turner, J; Witte, K; Zolotorev, M

The Photocathode Electron Gun (PEG) at SLAC is required to produce bunch intensities of up to 10[sup 11] electrons within 2 ns (8 Amps). Operation of PEG has demonstrated a 'Charge Limit' phenomenon, whereby the charge that can be extracted from the gun with an intense laser beam saturates at significantly less than 10[sup 11] electrons (the expected Space Charge Limited' charge) when the photocathode Quantum Efficiency is low. We report studies of this Charge Limit phenomenon observed with a GaAs photocathode.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6851651
• Report Number(s): SLAC-PUB-6019; CONF-9211182--2; ON: DE93006948
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301* -- Particle Accelerators-- Ion Sources
ARSENIC COMPOUNDS
ARSENIDES
BEAM BUNCHING
BEAM DYNAMICS
CATHODES
EFFICIENCY
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON GUNS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
LASER RADIATION
PHOTOCATHODES
PNICTIDES
QUANTUM EFFICIENCY
RADIATIONS
SPACE CHARGE