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Propagation of low energy solar electronsTwo events are reported in which 2-10 keV electrons of solar energy have undergone significant adiabatic mirroring and pitch angle scattering in large scale magnetic structures in the interplanetary medium within a distance of about 0.5 AU from the earth. Electrons of 3 keV, typical of the energies measured, have a speed of about one-tenth of the speed of light, so that their travel time from the sun at 0 deg pitch angle would be about 100 minutes. Their cyclotron radius is about 20 km for a pitch angle of 30 deg, and a field of magnitude of 5 nT, and the cyclotron period is about 7.1 milliseconds. The electrons are scattered by spatial variations in the interplanetary magnetic field. When the spatial variations are convected past a stationary spacecraft by a 500 km/sec solar wind, they are seen as temporal fluctuations at a frequency of about 3 Hz.
Document ID
19810057018
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Anderson, K. A.
(California Univ. Berkeley, CA, United States)
Mcfadden, J. P.
(California Univ. Berkeley, CA, United States)
Lin, R. P.
(California, University Berkeley, CA, United States)
Date Acquired
August 11, 2013
Publication Date
July 1, 1981
Publication Information
Publication: Geophysical Research Letters
Volume: 8
Subject Category
Solar Physics
Accession Number
81A41422
Funding Number(s)
CONTRACT_GRANT: NAS5-22307
Distribution Limits
Public
Copyright
Other

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