Dynamics of transient processes in relativistic backward wave tube driven with an external electromagnetic signal

The paper is devoted to theoretical and experimental study of relativistic backward wave tube driven with input electromagnetic signal. It was observed that input electromagnetic signal of “traditional” electronic devices can produce essential effect on operation of relativistic backward-wave tube despite its low level compared with the power of relativistic electron beam. It can reduce start-up time or even by impact for auto-oscillations in hard regime. There are parameter regions where frequency control can be realized: amplification and phase locking.