Abstract
We have made a Monte Carlo analysis of a radial-magnetic-field model for the solar wind, and find, for the quiet Sun, that a radius for the solar-wind cavity of 5 a.u. is compatible with measured proton spectra. The scattering mean free path for galactic protons by magnetic irregularities in the cavity is L(a.u.) 0.1 r2(a.u.)P3 12(GeV). The unmodulated energy spectrum of galactic protons is given by 4'(EK) 5for 0.1 <EK < 1.5 GeV. The net work done upon galactic protons by the solar wind is negligible. The net work done on galactic protons by "energetic" stellar winds can be considerable.
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