arXiv subjects

S. M. Grach

Publications and source records attributed to S. M. Grach.

2 recordsLinked to original sources

arXiv1998

Investigation of Joint Effect of Two Mechanisms of Probe Wave Anomalous Attenuation

Two mechanisms of anomalous attenuation of probe waves in the experiments of ionosphere modification are discussed in the paper. The first mechanism is the well-known conversion of ordinary wave into plasma waves due to scattering from random irregularities in the upper-hybrid resonance region. The second mechanism is the multiple scattering. This mechanism is responsible for anomalous attenuation of extraordinary wave have been observed in several experiments. Investigation of joint effect of both mechanisms gives additional possibilities for diagnostics of artificial irregularities.

physics.plasm-ph↗

arXiv1998

Dependence of Ordinary Wave Anomalous Absorption on the sounding Problem Parameters

The paper describes the straightforward method of calculation of anomalous absorption of ordinary wave due to transformation into plasma wave in the upper-hybrid resonance region of magnetized plasma with random irregularities. The method is based on the general approach to calculation of scattering or transformation cross-sections in magnetized plasma. The expressions for anomalous attenuation obtained in the paper take into account the thermal motions of the particles and have a wide area of application. Numeric estimations of anomalous absorption for different conditions are carried out.

physics.plasm-ph↗