Mode Conversion of Waves in the Ion-Cyclotron Frequency Range in Magnetospheric Plasmas
Journal article, 2013
Waves in the ion-cyclotron range of frequencies with linear polarization detected by satellites can be
useful for estimating the heavy ion concentrations in planetary magnetospheres. These waves are
considered to be driven by mode conversion (MC) of the fast magnetosonic waves at the ion-ion hybrid
resonances. In this Letter, we derive analytical expressions for the MC efficiency and tunneling of waves
through the MC layer. We evaluate the particular parallel wave numbers for which MC is efficient for
arbitrary heavy ion/proton ratios and discuss the interpretation of the experimental observations.