2D/3D image charge for modeling field emission
Abstract
Analytic image charge approximations exist for planar and spherical metal surfaces but approximations for more complex geometries, such as the conical and wirelike structures characteristic of field emitters, are lacking. Such models are the basis for the evaluation of Schottky lowering factors in equations for current density. The development of a multidimensional image charge approximation, useful for a general thermal-field emission equation used in space charge studies, is given and based on an analytical model using a prolate spheroidal geometry. A description of how the model may be adapted to be used with a line charge model appropriate for carbon nanotube and carbon fiber field emitters is discussed.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 21, 2016
- Source ID
- 10.1116/1.4968007
Entities
People
- D. Shiffler
- I. M. Rittersdorf
- J. R. Harris
- John Petillo
- Kevin L. Jensen
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- United States Naval Research Laboratory