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Inference of the ring current ion composition by means of charge exchange decay (1981)

Hoffman, R. A. ; Bewtra, N. K. ; Smith, P. H.

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Publication Date: 2011-08-18

Description: The analysis of data from the Explorer 45 (S3-A) electrostatic analyzer in the energy range 5-30 keV has provided some new results on the ring current ion composition. It has been well established that the storm time ring current has a decay time of several days, during which the particle fluxes decrease nearly monotonically. By analyzing the measured ion fluxes during the several day storm recovery period and assuming that beside hydrogen other ions were present and that the decays were exponential in nature, three separate lifetimes for the ions were established. These fitted decay lifetimes are in excellent agreement with the expected charge exchange decay lifetimes for H(+), O(+) and He(+) in the energy and L value range of the data.

Keywords: GEOPHYSICS

Type: Journal of Geophysical Research; 86; May 1

Format: text

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