Features of emission and field electron spectroscopy of oxide thermocathode

The results of a study of the emission characteristics and gas release of oxide thermocathode by the method of time diagrams in the temperature range of 678÷885 °C and emission currents from 0.08 to 1.3 mA are presented, a directly proportional dependence of the partial pressures of the released gases CO and CO2 on the cathode emission current is established. The energy spectra of the emitted electrons of oxide thermocathode at a temperature of ~600 °C were measured, corresponding to the "spotted cathode" model. The dynamics of changes in the energy spectrum of the emitted electrons of the “spotted cathode” is presented, showing the existence of stages of activation, growth and deactivation of the emission of “spots” with an increase in the emission voltage.