Satellite sweeping of electrons at Neptune and Uranus
Article first published online: 7 DEC 2012
Copyright 1990 by the American Geophysical Union.
Geophysical Research Letters
Volume 17, Issue 10, pages 1665–1668, September 1990
How to Cite
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 24 MAY 1990
- Manuscript Received: 4 APR 1990
Knowledge of satellite sweeping parameters at Neptune and Uranus, and of their functional dependences on particle energy and pitch angle, can be critical in the proper identification of parent absorbers for observed absorption signatures in regions where OTD (Offset, Tilted Dipole) models are valid representations of the measured magnetic fields. In this paper, we calculate critical electron energies for longitudinal drift resonance, snowplow (i.e., strong) absorption, leapfrog, and corkscrew effects, using a reduced version of OTD that neglects nonaxial dipole offsets. Earlier analytic work on sweeping rates is extended to give the radial dependence of these rates the minimum-L region and to set limits on diffusion of electrons with the simplifying approximation that leapfrog effects are ignored.