The electrodynamics of a co-axial plasma slow-wave structure of a Plasma Cherenkov Amplifier driven by a high-current REB in finite magnetic field

The experiment devoted to microwave transport (ω0 = 7.8∗10¹⁰ s⁻¹, P = 100 W) down the co-axial plasma slow-wave structure in finite magnetic field (B = 0.02–2.5 T) is reported. The experimental results are treated in terms of the analytical and numerical ones obtained by using the following problem sets-up: 1. the general dispersion equation for the case of uniform plasma annulus with sharp boundaries; 2. the numerical solving of Maxwell equations for ϕ, z — components of electromagnetic field in the case of nonuniform radial plasma density profile; 3. the PIC — simulation for microwave transport down the co-axial plasma waveguide of finite length.