INVESTIGATION OF METHODS INCREASING EFFICIENCY OF HEAVY-CURRENT BACKWARD-WAVE TUBE

The aim is to investigate the methods increasing the efficiency of the relativistic backward-wave tube (BWT) and to create the oscillators operating in stable condition at high level of the output peak power. The causes of limiting efficiency of the power exchange have been analysed on base of the numerical calculations. It has been shown that the longitudinal profiling of the phase velocity in the synchronous wave enables to increase sufficiently (up to 2 times) the efficiency of oscillator. The influence of asycronous waves has been investigated: the BWT optimization methods according to the interaction with following wave have been proposed. On base of heavy-current electron accelerator the two-sectional isochronic BWT with efficiency 40% and homogeneous oscillators with efficiency 25% and high stability of the radiation pulses being optimal according to the interaction with following wave have been realized firstly. The pulse power of the microwave radiation achieved 650 MW. Application field: relativistic high-frequency electronicsAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio