Plasma Filled Microwave Tubes

This paper summary presents the development of the microwave devices with plasma-filled. Based on this issue, it is important studied in detail that the experimental apparatus and experimental results of the PASOTRON(Plasma Assisted Slow-wave Oscillator). And designed the mode converter from the results of the numerical calculation for the mathmatics model,and acquired the structure scale of the mode converter. This paper mainly has the following contents:1. Based on the interaction of the plasma,beam and wave, it is summary presents the performance parameters of the microwave devices filled with plasma. And analyse the formation of the hybrid mode in the chain of coupled cavity, it is confirm the performance of the type devices through the experimental results of the loaded plasma coupled cavity traveling wave tube.2. Designed and made the experimental apparatus of PASOTRON. Especially analysed and designed the plasma hollow-cathode electron gun,the electric-beam self-pinching and transmitting system,the slow wave structure filled with plasma,the vacuum and gas-feed system,and take part in the formation and debug.3. Taken part in the experimental and analysed the experiment results. Especially to studied the discharge experimental of the plasma hollow-cathode E-gun and the E-beam transmissin testing. The experimental results grounded researching and developing in the plasma-filled microwave devices. And designed the pluse microwave measure system for the next step of the project created useful condation.4. Designed a novel wideband TMoi - TEn circular waveguide RF mode converter. Calculate the mathmatics model of the mode converter, and acquired the relation of the normalized input impedance,normalized input reactance and input VSWR versus frquency. Optimized the structure scale of the modeconverter.Our subject project is develop the microwave devices filled with plasma in the first. So the results of this paper are valuable not only to the next resarch of the PASOTRON but also to the development of the other type plasma microwave devices.