FYI: Discovery of geomagnetically trapped cosmic ray antiprotons
http://arxiv.org/PS_cache/arxiv/pdf/1107/1107.4882v1.pdf Excerpts from abstract: "This Letter reports the discovery of an antiproton radiation belt around the Earth. The trapped antiproton energy spectrum in the South Atlantic Anomaly (SAA) region has been measured by the PAMELA experiment for the kinetic energy range 60-750 MeV." "PAMELA data show that the magnetospheric antiproton flux in the SAA exceeds the cosmic-ray antiproton flux by three orders of magnitude at the present solar minimum, and exceeds the subcutoff antiproton flux outside radiation belts by four orders of magnitude, constituting the most abundant source of antiprotons near the Earth." The detected energies extend into the GeV range... Mark N. Iverson
