Nanosecond-length electron pulses from a laser-excited photocathode

Conference · Sun Dec 31 23:00:00 EST 1989 · Review of Scientific Instruments; (USA)

OSTI ID:6904139

Young, A T; D'Etat, B; Stutzin, G C; Leung, K N; Kunkel, W B ^[1]

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1. Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (US)

A photocathode made from polycrystalline lanthanum hexaboride (LaB{sub 6}) has produced nanosecond-length electron pulses when excited by an excimer laser at 308 nm. Peak currents in excess of 1 A have been observed, with quantum yields of 4{times}10{sup {minus}5} being measured. A method for extracting the electrons from an emission-limited cathode, plasma extraction, has been demonstrated. This technique uses a low-power continuous discharge to provide the electric field needed to extract the photoelectrons. This technique may be useful in producing high-repetition-rate short-pulse ion sources.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6904139
• Report Number(s): CONF-890703--
• Journal Information: Review of Scientific Instruments; (USA), Journal Name: Review of Scientific Instruments; (USA) Vol. 61:1; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360206 -- Ceramics
Cermets
& Refractories-- Radiation Effects
640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM CURRENTS
BORIDES
BORON COMPOUNDS
CATHODES
CURRENTS
DESIGN
EFFICIENCY
ELECTRODES
ELECTRON SOURCES
EMISSION
EXCIMER LASERS
GAS LASERS
LANTHANUM BORIDES
LANTHANUM COMPOUNDS
LASERS
LAWRENCE BERKELEY LABORATORY
NATIONAL ORGANIZATIONS
OPERATION
PARTICLE SOURCES
PHOTOCATHODES
PHOTOEMISSION
PULSE RISE TIME
QUANTUM EFFICIENCY
RADIATION SOURCES
RARE EARTH COMPOUNDS
SECONDARY EMISSION
TIMING PROPERTIES
US AEC
US DOE
US ERDA
US ORGANIZATIONS