1974/06/01 by J. C. Wiesner, T. E. Everhart · 1 citation
Engineering · Physics and Astronomy · Materials Science · Chemistry · Mathematics · #Photocathodes and Microchannel Plates #Scientific Research and Discoveries #Electron and X-Ray Spectroscopy Techniques #Cathode #Equipotential #Physics #Electron #Point (geometry) #Anode #Point source #Optics #Equipotential surface #Diode #Addendum #Electron optics #Computational physics #Geometry #Quantum mechanics #Chemistry #Mathematics
paper · pdf · doi:10.1063/1.1663676
openalex publication_date 1974/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/26
The most popular model for a field emission diode has been a spherical cathode inside a concentric spherical anode. A much more accurate model assumes the cathode is an equipotential of a sphere centered on the tip of a narrow cone. The authors have discussed this latter model in some detail. The purpose of this paper is to point out similarities between the sphere and the sphere-on-cone models and to correct errors in our previous paper. The similarities discussed here make earlier results more useful in concept and practice. In particular, the sphere-on-cone model predicts a source size from 1.5 to 2.6 times larger than predicted by the simple sphere model that is normally used.