Hexagon Meesh Grid Structure in the Field Electron Emission of Carbon Nanotube Cold Cathodes

Carbon nanotube is the relatively ideal cathode material because of its good characteristics in the field-emission.The characteristics of the large area of carbon nanotube cold cathodes are simulated by the three-dimensional particle simulation field-emission field-emisionotube cold cathodes with difer of the mesh grid is studied.grid is studied.ferent paramete By computing the electric-fielddistribution on the surface of the cold cathode and comparing the pass rate of the beam curent in the fielurrent in the fie optimal meshsize of the hexagon mesh isobtained and the maximum pass rate of the electron beam is 75%.