Dispersion Characteristics of a Beam-Driven Cylindrical Waveguide with Dielectric Liner.

摘要

The dispersion relation for a dielectric-lined, cylindrical waveguide filled with an electron beam is derived by using Maxwell's equations and the Lorentz force law. By using a no-beam approximation, the fundamental (TM01) mode is calculated with parameters resembling those expected in the Harry Diamond Laboratories Cerenkov device. Each of these parameters (waveguide size, dielectric thickness, and dielectric constant) is then varied to illustrate their effects on the dispersion curve. Higher TM0n modes (through TM06) are calculated to show how it is possible to couple to higher modes by using appropriate dielectric thicknesses. (Author)