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| Titel |
Ion motion in the current sheet with sheared magnetic field – Part 2: Non-adiabatic effects |
| VerfasserIn |
A. V. Artemyev, A. I. Neishtadt, L. M. Zelenyi |
| 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 ; 20, no. 5 ; Nr. 20, no. 5 (2013-10-31), S.899-919 |
| Datensatznummer |
250086065
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| Publikation (Nr.) |
 copernicus.org/npg-20-899-2013.pdf |
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| Zusammenfassung |
| We investigate dynamics of charged particles in current sheets
with the sheared magnetic field. In our previouspaper (Artemyev et al., 2013) we studied the particle motion in such magnetic field configurations on the
basis of the quasi-adiabatic theory and conservation of the quasi-adiabatic
invariant. In this paper we concentrate on violation of the adiabaticity due
to jumps of this invariant and the corresponding effects of stochastization of a
particle motion. We compare effects of geometrical and dynamical jumps, which
occur due to the presence of the separatrix in the phase plane of charged
particle motion. We show that due to the presence of the magnetic field
shear, the average value of dynamical jumps is not equal to zero. This effect
results in the decrease of the time interval necessary for stochastization of
trapped particle motion. We investigate also the effect of the magnetic field
shear on transient trajectories, which cross the current sheet boundaries.
Presence of the magnetic field shear leads to the asymmetry of reflection and
transition of particles in the current sheet. We discuss the possible influence
of single-particle effects revealed in this paper on the current sheet
structure and dynamics. |
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