Gyroresonant absorption from congruent reduction of an anisotropic pressure fluid model

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Abstract
A system of Maxwell, multifluid momentum and anisotropic pressure equations for a weakly inhomogeneous magnetized plasma is written in a special Hermitian form. A recently developed congruent reduction technique, for extracting embedded, multidimensional, pairwise mode conversion events, is applied in studying the electron gyroresonant absorption problem. The mode conversion from an electromagnetic mode to a fluid pressure mode near the fundamental and second harmonic gyrofrequency is interpreted as gyroresonant absorption. The transmission coefficient is found in an arbitrary three‐dimensional plasma and magnetic field geometry, demonstrating the potential of the approach for systematically reducing the order in general multicomponent wave propagation problems in nonuniform plasmas.