High brightness electron beam produced by a ferroelectric cathode | Zendy

B. Jiang | Zendy; G. Kirkman | Zendy; N. Reinhardt | Zendy

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High brightness electron beam produced by a ferroelectric cathode

Author(s) -

B. Jiang,

G. Kirkman,

N. Reinhardt

Publication year - 1995

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.113855

Subject(s) - cathode , cathode ray , thermionic emission , thermal emittance , brightness , anode , beam (structure) , materials science , cold cathode , electron , beam emittance , electron gun , optics , optoelectronics , atomic physics , physics , chemistry , electrode , nuclear physics , quantum mechanics

We report experimental measurements of a high brightness electron beam produced by a ferroelectric cathode. Up to 36 A of current (10 A/cm2) 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 1.2×1011 A/m2 rad2. 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.

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