Other
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.2701s&link_type=abstract
Journal of Geophysical Research, vol. 81, June 1, 1976, p. 2701-2708.
Other
7
Charge Exchange, Decay Rates, Magnetic Storms, Proton Flux Density, Ring Currents, Energy Spectra, Explorer Satellites, Proton Energy, Satellite Observation
Scientific paper
Explorer 45 (S3-A) measurements were made during the recovery phase of the moderate magnetic storm of February 24, 1972, in which a symmetric ring current had developed and effects due to asymmetric ring current losses could be eliminated. It was found that after the initial rapid decay of the proton flux, which is a consequence of the dissipation of the asymmetric ring current, the equatorially mirroring protons in the energy range 5-30 keV decayed throughout the L value range of 3.5-5.0 at the charge exchange decay rate calculated by Liemohn (1961). After several days of decay, the proton fluxes reached a lower limit where an apparent equilibrium was maintained, between weak particle source mechanisms and the loss mechanisms, until fresh protons were injected into the ring current region during substorms. While other proton loss mechanisms may also be operating, the results indicate that charge exchange is more than sufficient as a particle loss mechanism for the storm time proton ring current decay.
Fritz Teresa A.
Hoffman Robert A.
Smith Paul H.
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