Space-time evolution of the cathode layer in electron-beamcontrolled lasers

A study was made of the space-time evolution of the cathode layer in an electron-beam-controlled laser. It is shown that the formation of the cathode potential fall exhibits oscillations which are associated with space-charge fluctuations near the cathode. Estimates are made of the change in the thermodynamic state of the neutral plasma component, caused by inhomogeneous Joule heating.