| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8037756 | Ultramicroscopy | 2018 | 4 Pages |
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 cosÎ¸Ë factor in appropriately defined normalized co-ordinates. This is shown analytically for a hemiellipsoidal emitter and confirmed numerically for other emitter shapes with locally quadratic tips.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Debabrata Biswas, Gaurav Singh, Shreya G. Sarkar, Raghwendra Kumar,