The Emission Characteristics and Electron Energy Distribution Function of a Novel Composite Field Cathode Prototype

This manuscript comprises the novel experimental, numerical and theoretical investigation results for a newly developed low-macroscopic-field emission cathode prototype. The brief introductory information regarding the baseline for both scientific and engineering background is provided. The prototype acquisition process is described. Scanning electron microscopy images of the material surface are included. The results of emitted electron energy spectra modeling based on WKB approximation considering the formation of charged states with negative correlation energy values, correspond well to the acquired experimental data. Each of the observed peaks relates to the specific "hot electron" energy levels emerging due to the existence of the potential-well structure within the cathode surface layer.