High brightness electron beam produced by a ferroelectric cathode

Journal Article · Sun Mar 05 23:00:00 EST 1995 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.113855· OSTI ID:6437136

Jiang, B; Kirkman, G; Reinhardt, N ^[1]

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1. Integrated Applied Physics, Inc., Torrance, California 90503 (United States)

We report experimental measurements of a high brightness electron beam produced by a ferroelectric cathode. Up to 36 A of current (10 A/cm[sup 2]) were obtained at a voltage of 22.5 kV. Electron beam emission was obtained with a dc voltage held between the cathode and anode, and a gate pulse of 1--2 kV applied across the sample. The beam normalized emittance was measured at 10 kV to be 5 mm mrad with a normalized beam brightness of 1.2[times]10[sup 11] A/m[sup 2] rad[sup 2]. This value of beam brightness exceeds that of thermionic cathodes. The ferroelectric cathode emission is found to exceed that of a thermionic cathode using the same geometry.

• OSTI ID: 6437136
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 66:10; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

661220* -- Particle Beam Production & Handling
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM PRODUCTION
BEAMS
CATHODES
DESIGN
ELECTRODES
ELECTRON BEAMS
EMISSION
FERROELECTRIC MATERIALS
FIELD EMISSION
LEPTON BEAMS
PARTICLE BEAMS
PERFORMANCE
Ta
Targets-- (1992-)