A simplified FEA-based TWT model

Summary form only given. Knowledge of emitter geometry and materials allows prediction of gain, efficiency, power output, and circuit length of an emission gated TWT. The extension of a simple analytical model examines the basic physics involved, and gives a lower limit to the performance from an FEA-based TWT. Previous approaches to modeling an FEA cathode in an emission gated TWT (Twystrode) treated the FEA and tube physics separately, and joined analyses using the Fowler-Nordheim A and B parameters. These parameters were therefore independent. Here, A and B can be predicted on the basis of the geometry, materials, and uniformity of the array, allowing for a seamless relation of fabrication issues to tube performance.