Variability of coronal structures and ion components in the solar wind

The variations of solar wind ion fluxes of protons and-particles are studied in a wide timescale: from parts of a second to several months. A persistence time of about 60 hours was obtained for the large-scale variations of-particles. Power density spectra of velocity, density and magnetic field were studied in the frequency range from 10^–5 to 10^–3 Hz. Middle-scale fluctuations of both protons and-particles are close to each other and the spectrum for-particles has a somewhat greater slope than that for protons. Estimates of the variations of the flux power density are given in the frequency range from 10^–3 to 3 Hz.Presented at the VII STP-Symposium in the Hague (Netherlands), 1990.