Experimental and Theoretical Study of High Current Density Novel Emitter Sources.
Final rept. 30 Sep 91-29 Sep 95,
PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF PHYSICS
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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.
- Electricity and Magnetism