Excitation of Waves in Hot‐Plasma Waveguides with Infinite Magnetostatic Fields

摘要

The expressions for the electric field in a hot‐plasma‐filled waveguide with an infinite axial magnetostatic field due to a harmonically varying slot and double‐grid excitation are given. Ion motion and collisions are not included. Asymptotic expressions for large distances from the excitation are given which consist of pole and saddle‐point contributions. It is shown that for typical experimental parameters, the saddle‐point contribution is negligible.