Print Email Facebook Twitter Influence of gun design on Coulomb interactions in a field emission gun Title Influence of gun design on Coulomb interactions in a field emission gun Author Verduin, T. Cook, B. Kruit, P. Faculty Applied Sciences Department IST/Imaging Science and Technology Date 2011-12-02 Abstract The authors investigate by simulation the Coulomb effects on brightness and energy spread for cold field emitters. At first, we show that brightness is ultimately limited by Coulomb interactions. The authors analyze the maximum attainable brightness for tip radii ranging from 1?nm to 1??m. Remarkably, the brightness of a tip of 1?nm is comparable to a tip of 1??m. Higher brightness can be achieved by adding a plate at the base of the field emitter, and therefore decreasing the shank length. However, the brightness enhancement due to the protrusion is ultimately limited by large extractor voltages and increased energy spread. In particular, the energy spread for larger tip radii grows faster with brightness. The authors conclude that performance enhancement due to the protrusion works best for smaller tip radii. Subject electron gunsfield emission To reference this document use: http://resolver.tudelft.nl/uuid:f2c8ec52-defe-4518-9ca0-2aa66366006b Publisher American Vacuum Society ISSN 1071-1023 Source https://doi.org/10.1116/1.3660798 Source Journal of Vacuum Science & Technology B, 29 (6), 2011 Part of collection Institutional Repository Document type journal article Rights © 2011 American Vacuum Society Files PDF Verduin_2011.pdf 480.73 KB Close viewer /islandora/object/uuid:f2c8ec52-defe-4518-9ca0-2aa66366006b/datastream/OBJ/view