Observations of trapped electrons at low and high altitudes
1968; American Geophysical Union; Volume: 73; Issue: 17 Linguagem: Holandês
10.1029/ja073i017p05673
ISSN2156-2202
AutoresD. J. Williams, J. F. Arens, L. J. Lanzerotti,
Tópico(s)Geomagnetism and Paleomagnetism Studies
ResumoJournal of Geophysical Research (1896-1977)Volume 73, Issue 17 p. 5673-5696 Observations of trapped electrons at low and high altitudes D. J. Williams, D. J. WilliamsSearch for more papers by this authorJ. F. Arens, J. F. ArensSearch for more papers by this authorL. J. Lanzerotti, L. J. LanzerottiSearch for more papers by this author D. J. Williams, D. J. WilliamsSearch for more papers by this authorJ. F. Arens, J. F. ArensSearch for more papers by this authorL. J. Lanzerotti, L. J. LanzerottiSearch for more papers by this author First published: 1 September 1968 https://doi.org/10.1029/JA073i017p05673Citations: 109AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Energetic (≳280 kev, ≳ 1 Mev) trapped electron intensities have been simultaneously obtained at low and high altitudes for a 6-month period in 1965 by the satellites 1963 38C and Explorer 26. The data show that the ≳280-kev electron population attains equilibrium within a flux tube after a magnetic storm significantly faster than do the ≳1-Mev electrons. Mechanisms leading to the equilibrium state are therefore less effective at the higher energies. An example of this is given in terms of pitch-angle scattering by whistler mode noise. The comparison of particle response characteristics at low and high altitudes during a main phase storm also is used to obtain a rough measure of field expansion in the storm. In addition energetic electrons associated with main phase magnetic storms are observed to appear initially at L values well within the trapping regions and subsequently diffuse to lower and higher altitudes. The region of appearance of these electrons is strongly correlated with Dst magnitude. Preliminary results indicate that the acceleration mechanisms responsible for the appearance of these energetic electrons act on the high-altitude side of the whistler knee. The appearance of energetic electrons in the trapping regions from the equator to low altitudes during the April 17, 1965, storm also correlates very well spatially with an observed depletion of maximum ionospheric electron density Nm F2, [Bauer and Krishnamurthy, 1968b]. Citing Literature Volume73, Issue17Space Physics1 September 1968Pages 5673-5696 RelatedInformation
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