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Charge exchange lifetimes for ring current ions

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Abstract

In applying the charge exchange mechanism to ion phenomena within the Earth's magnetosphere it is critical to the proper interpretation of observations that the charge exchange lifetimes for the ions be known as accurately as possible. Various new results have been published which significantly modify the charge exchange lifetimes which have been used in space physics research during the past decade and a half. Some of the newer results have been used in the application of the charge exchange decay mechanism but the use has been limited and for the most part incomplete. The neutral hydrogen density distribution now yields lifetimes which are shorter than previously calculated, while the functional dependence of the lifetimes on pitch angle provides for slower decay for ions mirroring off the geomagnetic equator. This review coalesces and summarizes the latest and best measurements of the physical quantities involved in the complete calculation of the charge exchange lifetime of the mirroring magnetospheric ions.

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Authors and Affiliations

  1. Laboratory for Planetary Atmospheres, NASA/Goddard Space Flight Center, 20771, Greenbelt, MD, USA

    Paul H. Smith

  2. Computer Sciences Corporation, 20910, Silver Spring, MD, USA

    N. K. Bewtra

Authors
  1. Paul H. Smith
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  2. N. K. Bewtra
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Smith, P.H., Bewtra, N.K. Charge exchange lifetimes for ring current ions. Space Sci Rev 22, 301–318 (1978). https://doi.org/10.1007/BF00239804

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  • DOI: https://doi.org/10.1007/BF00239804

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