Observation of a charge limit for semiconductor photocathodes

Journal Article · Tue Jun 15 04:00:00 EDT 1993 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.353382· OSTI ID:6475713

Woods, M; Clendenin, J; Frisch, J; Kulikov, A; Saez, P; Schultz, D; Turner, J; Witte, K; Zolotorev, M ^[1]

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1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)

The Stanford Linear Accelerator Center is currently operating with a photocathode electron gun (PEG) to produce polarized electrons for its experimental program. Bunch intensities of up to 10[sup 11] electrons within 2 ns (8 A) are required from the electron gun. 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. Studies of this charge limit phenomenon observed with a GaAs photocathode are reported.

• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6475713
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 73:12; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
43 PARTICLE ACCELERATORS
430300* -- Particle Accelerators-- Auxiliaries & Components
ARSENIC COMPOUNDS
ARSENIDES
BEAMS
CATHODES
ELECTRODES
ELECTRON GUNS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
LIMITING VALUES
NATIONAL ORGANIZATIONS
PHOTOCATHODES
PNICTIDES
POLARIZED BEAMS
SPACE CHARGE
STANFORD LINEAR ACCELERATOR CENTER
US DOE
US ERDA
US ORGANIZATIONS