TWT with auto tuning of delay

The analysis of various ways of increase of efficiency in TWT-O at the expense of change of phase speed of a wave along area of interaction specifies that, despite of their distinction in physical principles and final results, general for all of them the delay of cold phase speed of a wave is in the field of selection of energy from a phase clot of a beam. Such conditions can be realized in TWT with hypothetical slowing system (SS), in which the phase speed v/sub h/ in section z is completely determined by amplitude of a signal in that section. It is possible to assume, for example, that in spiral SS are entered magnetic-dielectric cores from a material, which electrical and magnetic properties vary with influence on it a microwave-field and it is resulted in dependence v/sub h/(E/sub m/), where E/sub m/ is amplitude of a microwave field. The analysis of character v/sub h/(z) and E/sub m/(z) in variants optimum TWT with irregular SS shows, that up to a mode of saturation the monotonous increase E/sub m/ and simultaneously decrease v/sub h/ by the end of area of interaction is observed. Hence, it is necessary to select the law v/sub h/(E/sub m/), with which v/sub h/ decreases with growth E/sub m/. For some dielectric, it´s dielectric permeability grows with increase E/sub m/. In the present work a model the accounts TWT with SS are executed, in which the law V/sub h/=V/sub ha/-/spl alpha/A/sup 2/ (V/sub h/=v/sub h//v/sub a/, v/sub c/ initial speed of electrons is accepted, A=eE/sub m//(m/sub 0//spl omega//sub 0/v/sub a/)). The efficiency of interaction is estimated by size of wave efficiency.