Preequilibrium Thermofield Microprotrusion as Effective Field Point Sorces of Electrons and Ions

摘要

Field emission methods are employed for standing the conditions of formation, crystallographic localization and emissive properties preequilibrium thermofield microprotrusions for a number refractory metals. The thermofield microprotrusions are the crystalline objects with the sizes ～100 A, the radii of curvature of the microprotrusions tops are r ～10-15 A. The microprotrusions may be used as ideal point sources of the electrons and ions. The thermofield microprotrusions may be stationary, equilibrium and preequilibrium. A microprotrusion undergo a influence of a field strength pressure P{sub}F = F{sup}2/8π and surface tension strength P{sub}γ = 2γ/r (F - field strength, γ - surface tension coefficient). The pressures and emitter temperature T create three flows - a flow of blunting -J{sub}γ, a flow of sharpening J{sub}F and a flow of evaporation -J{sub}e.