Dependence of the Effective Length of a Receiving Antenna on the Space Charge Distribution in a Model Source of Quasi-Electrostatic Chorus Emissions

Recently it was shown on the basis of general theory of antennas in plasmas that the effective length of a receiving dipole antenna can be much greater than its geometric length in the case of reception of quasi-electrostatic chorus emissions propagating close to the resonance cone. For such calculations one needs to specify a model wave source, since the actual source—receiver geometry is not well known in the case of chorus emissions generated in a distributed region by a complicated nonlinear process. In this paper, we analyze how the effective length of a spacecraft-borne receiving antenna depends on the parameters of a model source of quasi-electrostatic chorus emissions. In particular, we study the dependence of the effective length on characteristic scales of the space charge distribution in the source and the distance between the source and the receiving antenna.