ELECTRON-EMISSION FROM A SINGLE SPINDT-TYPE FIELD EMITTER - COMPARISON OF THEORY WITH EXPERIMENT

A simple analytic model of the electron emission from a single tip fie ld emitter is correlated with experimental measurements made on a sing le Spindt-type molybdenum field emitter using a nanofabricated anode w hose position from the emitter was determined using laser interferomet ry. It is shown how the model may be extended to find the trajectories needed for particle simulations. Methods used to correlate theory wit h experiment are explained, and the dependence of the beam profile on tip sharpness, gate diameter, anode distance, and tip work function ar e examined. A simple analysis of the effects of space charge on field emission is presented and correlated with experimental data, Analysis has shown that the rms spread angle is approximately 20 degrees.