Pitch angle dependence of the charge exchange lifetime of ring current ions in a Mead-Fairfield magnetic field model

Details Pitch angle dependence of the charge exchange lifetime of ring current ions in a Mead-Fairfield magnetic field model Pitch angle dependence of the charge exchange lifetime of ring current ions in a Mead-Fairfield magnetic field model

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989p%26ss...37.1433m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 37, Nov. 1989, p. 1433-1439.

Statistics

Computation

Charge Exchange, Earth Magnetosphere, Magnetic Field Configurations, Magnetospheric Ion Density, Pitch (Inclination), Ring Currents, Hydrogen Atoms, Ion Temperature, Life (Durability), Magnetic Anomalies

Scientific paper

This paper examines the necessity of using a realistic magnetospheric magnetic field geometry in the computation of the pitch-angle dependence of the charge exchange lifetime of ring current ions. The Chamberlain (1963) model is used for the atomic hydrogen density, and the pitch-angle dependence of the charge exchange lifetime, tau, has been computed for coefficients corresponding to different levels of geomagnetic activity in the Mead-Fairfield (1975) model of magnetic field. It is shown that using the correct model of the magnetic field is as important as adopting the proper exospheric temperature in the model for the neutral hydrogen model. A local time dependence of the pitch-angle dependence of tau also results from the adoption of a realistic description of the magnetic field.

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