Polarization studies of strained GaAs photocathodes at the SLAC Gun Test Laboratory

Conference · Tue Aug 01 04:00:00 EDT 1995

OSTI ID:621798

Saez, P; Alley, R; Clendenin, J; Frisch, J; Kirby, R; Mair, R; Maruyama, T; Miller, R; Mulhollan, G; Prescott, C ^[1]

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1. and others

The SLAC Gun Test Laboratory apparatus, the first two meters of which is a replica of the SLAC injector, is used to study the production of intense, highly-polarized electron beams required for the Stanford Linear Collider and future linear colliders. The facility has been upgraded with a Mott polarimeter in order to characterize the electron polarization from photocathodes operating in a DC gun. In particular, SLAC utilizes p-type, biaxially strained GaAs photocathodes which have produced longitudinal electron polarizations greater than 80% while yielding pulses of 5 A/sq cm at an operating voltage of 120 kV. Among the experiments performed include studying the influences of the active layer thickness, temperature, quantum efficiency and cessation on the polarization. The results might help to develop strained photocathodes with higher polarization.

• Research Organization: Stanford Linear Accelerator Center, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 621798
• Report Number(s): SLAC-PUB--95-6987; CONF-950512--; ON: DE97009083
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
DIRECT CURRENT
ELECTRON BEAMS
ELECTRON GUNS
ELECTROSTATICS
GALLIUM ARSENIDES
LABORATORY EQUIPMENT
LASERS
MEASURING INSTRUMENTS
PHOTOCATHODES
POLARIZATION
QUANTUM EFFICIENCY
ROTATION
SEMICONDUCTOR MATERIALS
SPIN WAVES
STANFORD LINEAR ACCELERATOR CENTER
STRAINS
TEST FACILITIES