PERFORMANCE OF A GAAS ELECTRON SOURCE

Authors
CALABRESE R CIULLO G DELLAMEA G EGENI GP GUIDI V LAMANNA G LENISA P MACIGA B RIGATO V RUDELLO V TECCHIO L YANG B ZANDOLIN S
Citation
R. Calabrese et al., PERFORMANCE OF A GAAS ELECTRON SOURCE, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 340(1), 1994, pp. 109-113
Citations number
15
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
340
Issue
1
Year of publication
1994
Pages
109 - 113
Database
ISI
SICI code
0168-9002(1994)340:1<109:POAGES>2.0.ZU;2-#
Abstract
We discuss the performance improvement of a GaAs electron source. High quantum yield (14%) and constant current extraction (1 mA for more th an four weeks) are achieved after a little initial decay. These parame ters meet the requirements for application of the GaAs photocathode as a source for electron cooling devices. We also present the preliminar y results of a surface analysis experiment, carried out by means of th e RBS technique to check the hypothesis of cesium evaporation from the surface when the photocathode is in operation.