EFFECTS OF THE SOLAR MAGNETIC-FIELD ON THE SOLAR-WIND STREAM STRUCTURE

We carry out a comprehensive analysis of experimental data on the sola r surface magnetic field and the scattering properties of the circumso lar plasma in the subsonic region at R congruent to (4-12)R. to study the formation mechanism of the solar wind stream structure. We use the data on the radial dependence of the scattering angle of radio waves obtained in 1985-1996 during radio occultation experiments in the circ umsolar plasma with the source 3C 144. These data are compared with th e helio-latitude structure of the solar surface magnetic field. We hav e established that the typical deviations of the relation between the scattering and the radial distance from a regular power law and the de crease in scattering at small distances from the Sun correlate with th e open structure of magnetic field lines and with the penetration of t he fields from coronal holes and other local sources in the plasma str eams.