Variation of field enhancement factor near the emitter tip
Applied Physics
2018-01-30 v1
Abstract
The field enhancement factor at the emitter tip and its variation in a close neighbourhood determines the emitter current in a Fowler-Nordheim like formulation. For an axially symmetric emitter with a smooth tip, it is shown that the variation can be accounted by a factor in appropriately defined normalized co-ordinates. This is shown analytically for a hemi-ellipsoidal emitter and confirmed numerically for other emitter shapes with locally quadratic tips.
Keywords
Cite
@article{arxiv.1705.06867,
title = {Variation of field enhancement factor near the emitter tip},
author = {Debabrata Biswas and Gaurav Singh and Shreya G. Sarkar and Raghwendra Kumar},
journal= {arXiv preprint arXiv:1705.06867},
year = {2018}
}
Comments
5 pages, 6 figures