Paper presented at the AGU Spring Meeting, 27-30, May, 1997, Baltimore, USA
We determine O7+ and O6+ fluxes with the charge- and mass- spectrometer CTOF of the CELIAS instrument on board SOHO to derive the freeze-in temperature of oxygen charge states. It is well known that the freeze-in temperature is a sensitive measure of the den- sity and temperature of the corona and thus reveals information about the structure of the latter. The unprecedented high time-resolution of the CTOF data makes it possible to use the freeze-in temperatures to look for small-scale structures in the slow solar wind and to relate them to features observed in the inner corona and in the solar atmo- sphere. The freeze-in temperature is especially suited for such a type of investigation, because the charge state distributions remain essentially unchanged from a few solar radii to 1 AU, in contrast to kinetic solar wind properties.