Title :
Analytic evaluation of field emission enhancement factors for ellipsoidal cones and elliptic cross-section wedges
Author :
Kosmahl, Henry G.
Author_Institution :
Analex Corp., Brook Park, OH, USA
fDate :
6/1/1991 12:00:00 AM
Abstract :
An unambiguous comparison for the magnification factor, M, in field emission is derived by solving rigorously Laplace equations for the cases of individual prolate ellipsoids (cones) of revolution on one side, and for an elliptical wedge on the other side, under the assumption that a uniform electric field exists at some distance away from the emitting surface. Significant superiority of M for individual emitters with rotational symmetry is demonstrated as compared to the wedge. Also discussed is the case of a floating sphere
Keywords :
electron field emission; vacuum microelectronics; Laplace equations; ellipsoidal cones; elliptic cross-section wedges; emitters with rotational symmetry; field emission amplifiers; field emission devices; field emission enhancement factors; floating sphere; magnification factor; modelling; Anodes; Boundary value problems; Electrodes; Electrooptic effects; Ellipsoids; Frequency; Geometry; Laplace equations; Maxwell equations; Voltage;
Journal_Title :
Electron Devices, IEEE Transactions on
