KINETIC-PROPERTIES OF HEAVY-IONS IN THE SOLAR-WIND FROM SWICS ULYSSES

The kinetic properties of heavy ions in the solar wind are known to be have in a well organized way under most solar wind flow conditions: Th eir speeds are all equal and faster than that of hydrogen by about the local Alfven speed and their kinetic temperatures are proportional to their mass. The simplicity of these properties points to a straightfo rward physical interpretation; wave-particle interactions with Alfven waves are the probable cause. With the SWIGS sensor on board Ulysses, it is now possible to investigate the kinetic properties of many more ion species than before. Furthermore, the transition of Ulysses into t he fast stream emanating from the south polar coronal hole since 1992 allows us to study these properties both in the slow, interstream sola r wind, as well as in an unambiguously identified fast stream. We pres ent data from SWICS/Ulysses on the dominant ions of He, C, O, Ne, and Mg. As a result we find that, both in the slow wind and in fast stream s, the isotachic property is obeyed even better than it could be deter mined by the IGI instrument on ISEE-3. The mass proportionality of T-k in is also shown to hold for these ions, including the newly identifie d C and Mg.