Forevacuum plasma-cathode electron source for generation of a ribbon beam over a wide pressure range

We describe the results of our investigations of the generation of a ribbon electron beam (10 × 220 mm2) by a two-stage discharge system based on a hollow-cathode glow discharge plasma. The source design enables operation in the pressure range 2 × 10−2 to 10 Pa. At a beam accelerating voltage of 8 k...

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Bibliographic Details
Published in:Review of scientific instruments 2023-07, Vol.94 (7)
Main Authors: Klimov, A. S., Bakeev, I. Yu, Burachevsky, Yu. A., Dagri, J. E., Oks, E. M., Zenin, A. A.
Format: Article
Language:English
Subjects:
Cathode glow
Current density
Density distribution
Electron beams
Glow discharges
Scientific apparatus & instruments
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Summary:We describe the results of our investigations of the generation of a ribbon electron beam (10 × 220 mm2) by a two-stage discharge system based on a hollow-cathode glow discharge plasma. The source design enables operation in the pressure range 2 × 10−2 to 10 Pa. At a beam accelerating voltage of 8 kV, the beam current is 450 mA at a pressure of 2 × 10−2 Pa and 150 mA at a pressure of 10 Pa. To achieve a uniform current density distribution of the beam over its cross-sectional area, a special design of emission electrode was employed. This enabled us to reduce non-uniformities of the beam current density distribution to a level of 10%.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0159804