Numerical analysis of the surface-conduction electron-emitter with a new configuration

A new kind of surface-conduction electron-emitter (SCE) with a triangular dielectric layer under the conductive film is proposed. The influences of the vertex angle [Formula: see text] of the triangular dielectric layer and the anode voltage [Formula: see text] on the electron emission efficiency and the focusing capability have been investigated with the finite integration technique (FIT). The numerical simulation results show that SCE with a small vertex angle guarantees higher electron emission efficiency even with a low anode voltage. But the focusing capability of the electron emitter will get worse when the [Formula: see text] or [Formula: see text] becomes too small. Take both the electron emission efficiency and focusing capability into consideration, the structure with a vertex angle [Formula: see text] between [Formula: see text]–[Formula: see text] and the anode voltage of 1500[Formula: see text]V is suggested.