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

Summary form only given. Application of an external signal is well-known method to control oscillations in generators of various types and nature. This technique is widely used in sources of radio frequency and microwave radiation for phase and frequency synchronization, but its application in high-power microwave (HPM) electronics meets some serious difficulties. The most significant of them are: a) Short-pulse operation of HPM devices. Typical duration of the pulse is about several hundred periods of oscillations, what may be too small for phase locking. b) Great difference in levels of input and output signals (>40 dB). It is caused by sufficient gap between the expected gigawatt power of HPM electron systems and about hundred kilowatts provided by the driver (even in case of powerful pulse magnetrons or similar devices). It means that the input power may be insufficient to produce noticeable effect on the operation of relativistic high-current microwave source. These circumstances make a research on operation of the HPM device with input microwave signal valuable.