Computational investigation of helical traveling wave tube transverse RF field forces

C.L. Kory, J.A. Dayton
2000 IEEE Transactions on Electron Devices  
In a previous study using a fully three-dimensional (3D) helical slow-wave circuit coldtest model it was found, contrary to classical helical circuit analyses, that transverse RF electric fields have significant amplitudes compared with the longitudinal component. The RF fields obtained using this helical cold-test model have been scaled to correspond to those of an actual TWT. At the output of the tube, RF field forces reach 61%, 26% and 132% for radial, azimuthal and longitudinal components,
more » ... udinal components, respectively, compared to radial space charge forces indicating the importance of considering them in the design of electron beam focusing.
doi:10.1109/16.817593 fatcat:zie46zi6obefdfrsqasd36jvxq