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| Titel |
Energetic particle cross-field diffusion: Interaction with Magnetic Decreases (MDs) |
| VerfasserIn |
B. T. Tsurutani, G. S. Lakhina, D. Winterhalter, J. K. Arballo, C. Galvan, R. Sukurai |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 6, no. 3/4 ; Nr. 6, no. 3/4, S.235-242 |
| Datensatznummer |
250003229
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| Publikation (Nr.) |
 copernicus.org/npg-6-235-1999.pdf |
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| Zusammenfassung |
| Magnetic field Decreases (MDs) are detected in the heliospheric
polar regions. The MDs have minimum spatial scales sizes of 25 proton thermal
gyroradii, and are typically bounded by tangential or rotational
discontinuities. The distribution of the magnitudes of the decreases within AIDs
is a continuum, with the smallest decreases being most frequent in occurrence.
The largest decreases can be 80% of the ambient field. The thickness
distribution is also a continuum, and is shown to be independent of the field
magnitude decrease. Charged particle interactions with the MDs lead to particle
guiding center displacements and hence particle cross-held diffusion. We develop
a diffusion model to apply to energetic ion interactions with MDs using the MD
properties described in this paper. One specific day of data is used to
illustrate that the particle cross-field diffusion will be extremely rapid due
to such interactions. |
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