Long-term reproducibility of emission characteristics of high-current diamond-graphite sources of electrons with field emission under non-stationary vacuum operating conditions

R. K. Yafarov^ab, A. V. Storublev<sup>bc

a</sup> Saratov Branch, Kotel'nikov Institute of Radio-Engineering and Electronics, Russian Academy of Sciences
^b Saratov State University
^c State Scientific-Production Enterprise ``Almaz''

Abstract: The results of a study of the long-term reproducibility of the emission characteristics of electron sources with field emission density of up to 1000 A/cm$^2$ of based on composite nanocarbon films are presented. It was found that high-current field emission is accompanied by the sputtering of residual gas ions from atoms of the cathode material and its sedimentation on the anode. The results can be used to predict the durability of high-current diamond-graphite cathodes with field emission when operating in unsteady temperature-vacuum conditions.

Keywords: diamond-graphite nanocomposite, high-current field emission, reproducibility of field emission parameters, service life of cathode with field emission.

Received: 25.05.2021
Revised: 12.09.2021
Accepted: 14.09.2021

DOI: 10.21883/PJTF.2021.24.51792.18883

Bibliographic databases:

•