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Fig. 8
Proton spectra at the shock location for the case of a shock compression ratio R = 7. The solid curve refers to an acceleration time of 10 Gyr, the dashed curve to an acceleration time of 5 Gyr. The shock velocity is 2000 km s-1, the magnetic field upstream is B1 = 0.3 μG and downstream B2 = 7B1.
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