Abstract
We have done a study of the electric field distribution on the surface of macroscopic and nanoscale field emitters. The electric field distribution was plotted by using simulation software COMSOL Multyphysics 5.2a. A numerical evaluation of the field enhancement factor dependence on the interelectrode distance was produced. We calculated parameter λ which describes this relationship for two different emission systems: elongated mono-tip metallic emitter with macro and micro scales. We conducted an experiments with model field cathodes: macroscopic tungsten tip and large area field emitter based on nanocomposite “carbon nanotubes / polystyrene”.
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