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Correlated particle and magnetic field observations of a large-scale magnetic loop structure behind an interplanetary shockFrom a survey of observations on ISEE-3, an example of correlated particle and magnetic field observations of a large-scale magnetic loop structure is presented. Bidirectional proton fluxes were observed for a period of 40 hours in the energy range 35-1600 keV approximately 12 hours after the passage of the interplanetary shock of December 11, 1980, and directly after the passage of a discontinuity. For each of the eight logarithmically spaced energy channels, a three-dimensional anisotropy analysis reveals streaming along both directions of the magnetic field. The magnetic field rotated slowly but steadily through approximately 180 deg during this same 40-hour period; this is consistent with the existence of a large-scale loop with extent greater than 0.5 AU. The observations suggest that the particles are being injected into the loop sunward of the spacecraft; they appear as bidirectional fluxes in the outermost regions of the loop arising from a combination of focusing and near scatter-free transport.
Document ID
19830065674
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sanderson, T. R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Marsden, R. G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Reinhard, R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wenzel, K.-P.
(ESA Space Science Dept., Noordwijk, Netherlands)
Smith, E. J.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1983
Publication Information
Publication: Geophysical Research Letters
Volume: 10
ISSN: 0094-8276
Subject Category
Astrophysics
Accession Number
83A46892
Distribution Limits
Public
Copyright
Other

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