Optimization of Electrostatic Focusing for Line Source Electron Beam Emitter Assembly

We studied and analyzed the design of line source electron gun numerically and verified results experimentally. A minimum beam diameter of 0.9mm is achieved in the post anode region at a distance of 20mm from the centre of cathode surface. Simulated and experimental results are in good agreement sho...

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Bibliographic Details
Published in:Physics procedia 2012, Vol.32, p.891-895
Main Authors: Iqbal, Munawar, Islam, Ghalib ul, Faridi, Ayub, Rashid, Harris
Format: Article
Language:English
Subjects:
Acceleration voltage
beam diameter
cathode
focusing electrode & distance
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Summary:We studied and analyzed the design of line source electron gun numerically and verified results experimentally. A minimum beam diameter of 0.9mm is achieved in the post anode region at a distance of 20mm from the centre of cathode surface. Simulated and experimental results are in good agreement showing the maximum focusibilty, emission and beam uniformity throughout the emission surface. The gun is simple without any magnetic field and extra biasing to the focusing electrode. The gun is extremely useful for all type of metallurgical applications in general and for surface coating and surface modification experiments in special.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2012.03.653