Absorption of microwaves during resonant heating of plasma with a high concentration of electrons inside a waveguide

We show the role of resonant absorption and redistribution of a microwave field along the force lines during the interaction of the field with a confined plasma with above-critical electron concentration at low gas pressure. We calculate, and compare with experiments, the absorption and reflection coefficients of microwaves by a plasma column in a waveguide. We show that the kinetic processes in the plasma can be controlled effectively by a pulsed microwave heating.