Coaxial plasma-filled structures

The high-power generators and amplifiers provide efficiency enhancement and spectrum complexity due to plasma filling. For widening frequency band of radiation and tuning diapason the hybrid slow-wave plasma filled structures should be of coaxial type. Three kinds of coaxial structures have been investigated: in versed chain of inductively coupled cavities, magnetically insulated slow-wave coaxial waveguide, plasma-filled corrugated coaxial line. Numerical calculations are carried out for the set of parameters characterizing the structure geometry, plasma and electron beam. The formation of electron flow and generation process take place in the same device. It was shown that the generation frequency slightly changes over the voltage, that ensures its stability in operating regime.