New Super High Brightness and Stability Point Electron Source

Summary form only given: The report presents a new physical nanotechnology procedure to produce self-assembled nanoheterostructures (NHS) formed in thin (~10 nm) (ZrO₂) dielectric layers at the surface of needle-shaped Wlang100rang microcrystals. The studies of thermally activated electron emission from the ZrO₂-vacuum interface into vacuum under electrostatic field have shown that the electron emission behavior does not agree with the classical thermal field emission theory. The phenomenon studied was called the abnormal thermal field emission. It has been found that the normalized brightness and angular intensity of emission from the NHS surface are two orders of magnitude higher than those of ZrO/Wlang100rang Schottky cathodes. A phenomenological model for the mechanism of abnormal thermal field emission is offered. Some experimental results of the, research are given