Multilayer nano-structured field emitters for formation of high density electron beams in minituarized devices

The operation of the field emitters, consisting of nano-layers of materials with different work function was investigated in continuous mode. Dependence of the emission current on the thickness of the layers was calculated and experimentally measured. There were obtained currents ~ 170- 180 mkA and current density up to 10 A/cm from the cathods containing 40 pairs of layers Yb-C. Tested cathodes stably operated in technical vacuum conditions.