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