Accession Number : ADA305491
Title : Experimental and Theoretical Study of High Current Density Novel Emitter Sources.
Descriptive Note : Final rept. 30 Sep 91-29 Sep 95,
Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF PHYSICS
Personal Author(s) : Cutler, Paul H.
PDF Url : ADA305491
Report Date : 01 MAR 1996
Pagination or Media Count : 20
Abstract : Theoretical study during this grant period focused on solvable but realistic models of sharp metallic microtips to investigate the significance of curvature on tbe current voltage characteristics, the field emitted electron distributions (FEED) and the thermal stability of these emitters operating in high fields and temperatures. Field electron energy distributions have been calculated for hyperbolidal, paraboloidal and conical models of ultrasharp tips. A calculation was completed for the local density of states (LDOS) of a single atom discrete tip model. The charge simulation method was used to calculate tbe capacitance of a model diode consisting of a rounded conical tip and an annular ring a distance d above the tip.
Descriptors : *FIELD EMISSION, *NEEDLES, DIODES, MODELS, SHAPE, VOLTAGE, THERMAL STABILITY, ELECTRON ENERGY, HIGH DENSITY, EMITTERS, CONICAL BODIES, CAPACITANCE, PARABOLIC BODIES.
Subject Categories : Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE