Parallel Velocity Mixing Yielding Enhanced Electron Heating During Magnetic Pumping
| Autor: | Emily Lichko, J. M. Schroeder, Jan Egedal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Whistler Scattering FOS: Physical sciences Electron Condensed Matter Physics Bow shocks in astrophysics 01 natural sciences Space Physics (physics.space-ph) Physics - Plasma Physics Computational physics Magnetic field Plasma Physics (physics.plasm-ph) Solar wind Physics - Space Physics 0103 physical sciences Physics::Space Physics Pitch angle Diffusion (business) 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| ISSN: | 0022-3778 |
| Popis: | Magnetic wave perturbations are observed in the solar wind and in the vicinity of Earth's bow shock. For such environments, recent work on magnetic pumping with electrons trapped in the magnetic perturbations has demonstrated the possibility of efficient energization of superthermal electrons. Here we also analyse the energization of such energetic electrons for which the transit time through the system is short compared with time scales associated with the magnetic field evolution. In particular, considering an idealized magnetic configuration we show how trapping/detrapping of energetic magnetized electrons can cause effective parallel velocity ($v_{\parallel }$-) diffusion. This parallel diffusion, combined with naturally occurring mechanisms known to cause pitch angle scattering, such as whistler waves, produces enhanced heating rates for magnetic pumping. We find that at low pitch angle scattering rates, the combined mechanism enhances the heating beyond the predictions of the recent theory for magnetic pumping with trapped electrons. |
| Databáze: | OpenAIRE |
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