The behavior of the electric field in X and O modes in traveling wave tubes filled with magnetized plasma

In this article magnetized plasma filled traveling wave tubes are investigated. The mentioned system, is located inside a cylindrical wall. The space between the helix and the wall is filled with dielectric material. Dispersion relation for the azimuthally symmetric modes is achieved. Using field theory and by applying appropriate boundary conditions, dispersion relation is obtained for the desired configuration. An axial component of the electric field is investigated as an important parameter in the traveling wave tubes numerically. In this paper, the radial electric field changes are analyzed numerically for varying amounts of plasma density, dielectric constant, helix radius and axial magnetic field. Keywords: Traveling wave tube, Plasma, Heli