Applied Physics
N 3, 2002

The simulation of the thermionic grid emission in electron-optical systems of microwave tubes

A.I. Petrosyan, V.I.Rogovin
The federal state unitary enterprise "NPP “ALMAZ", Saratov, Russia

   The simulation of thermionic emission from control intercepting grid under space-charge-limited conditions and under temperature-limited conditions is carried out. It is shown, that thermionic grid emission increases with the reduction of grid voltage and may take place only under temperature-limited conditions, because the power of beam impinging (happening due to big transverse velocities of grid thermoelectrons) would be very large and would damage the tube long time before the space-charge-limited conditions would be reached.

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