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Fig. 2


Upper panel: radial distance of the HELIOS A space-probefrom the Sun. Indicated by the green and blue shaded regions are the close and far periods for which the spacecraft was within 0.3 and 0.45 AU, and 0.9 and 1 AU, respectively. Lower panel: count rate of Z ≥ 2 ions with energies from about 4 to 13 MeV nucleon−1 for helium.Shaded periods have been omitted in our analyses.

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