Skin depth of electromagnetic waves in plasma with magnetic field and collisions

Skin depth delta ana wave number of various electromagnetic waves in plasma in which collisions occur have been analyzed without and with the magnetic field: right (R)- and left (L)- hand circularly polarized, ordinary (O) and extraordinary (X) waves. For most evanescent waves, delta is expressed as fc/omega(pe) for omega(pe) much greater than omega, nu (f: collision term, nu : collision frequency, c : velocity of Light, omega(pe) : electron plasma angular frequency). For L and X waves under limited conditions, delta is c/omega(pe) multiplied by (omega(ce)/omega)(0.5) and omega(ce)/omega(pe), respectively (omega(ce): electron cyclotron angular frequency). In the low nu range with omega approximate to omega(pe), delta becomes large for light, O,R and X waves (omega much greater than omega(ce)).