Design and analysis of a W-band high power extended interaction oscillator with distributed hollow electron beam

The circuit suitable for the hollow electron beam (HEB) interaction was formed by parallel connecting of the sheet beam extended interaction klystron circuit at the angular direction. The analysis of this newly developed circuit shows it can interacts with the distributed HEB. To demonstrate this capability, a W-band extended interaction oscillator (EIO) with distributed HEB has been designed. A DC distributed HEB with 27 keV energy and 8A current was injected into the interaction circuit, simulations with a 3-D Particle-in-cell (PIC) code predict an output power up to 6.6 kW at 99.7 GHz was obtained.