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| Titel |
Width dependent collisionless electron dynamics in the static fields of the shock ramp, 2, Phase space portrait |
| VerfasserIn |
M. Gedalin, U. Griv, M. A. Balikhin |
| 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 ; 4, no. 3 ; Nr. 4, no. 3, S.173-184 |
| Datensatznummer |
250001685
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| Publikation (Nr.) |
 copernicus.org/npg-4-173-1997.pdf |
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| Zusammenfassung |
| We study numerically in detail the behaviour of electrons in the
strongly inhomogeneous static magnetic and electric fields, which are typical for thin
quasiperpendicular collisionless shocks. We pay particular attention to the dependence of
the final electron velocities on their initial velocities, for different shock widths.
Electrons are completely magnetized when the shock is wide, but become
demagnetized, and
the energies that they acquire rapidly increase with the steepening of the field
structure. One of the clear manifestations of the electron demagnetization is the loss of
even approximate one-to-one correspondence of the downstream perpendicular velocity to the
upstream perpendicular velocity. Electron reflection occurs despite the large cross-shock
potential which accelerates electrons along the magnetic field (the regime of complete magnetization) or across the shock (strong demagnetization). The reflected ion fraction is sensitive to the potential,
magnetic field jump, and ramp width. |
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