Absorption of a high-frequency field in crossed electric and magnetic fields

The absorption of electromagnetic radiation in a plasma is studied in the presence of ion sound turbulence that is excited by electrons drifting in the crossed electric and magnetic fields. The effective electron collision frequencies, which determine the absorption of radiation polarized in the direction normal to the magnetic field, are obtained for frequencies close to and far from the electron cyclotron frequency. In the latter case, for linearly polarized radiation, the anisotropy of absorption, which depends on the orientation of the electric field of the radiation with respect to the direction of the electron drift, is found to be strong.