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| Titel |
Effects of electron drifts on collisionless damping of kinetic Alfvén waves |
| VerfasserIn |
Yuguang Tong, Stuart Bale, Christopher Chen, Chadi Salem, Daniel Verscharen |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250107148
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| Publikation (Nr.) |
 EGU/EGU2015-6840.pdf |
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| Zusammenfassung |
| Collisionless dissipation of obliquely propogating Alfvén waves has been a promising
candidate to solve the solar wind heating problem. Extensive studies have examined kinetic
properties of Alfvén waves in simple Maxwellian or Bi-Maxwellian plasmas. However, the
solar wind electron velocity distribution function is more complex. A study of Alfvén waves
in a plasma, whose electrons consist of two drifting populations in the proton bulk frame, is
reported here. We numerically solve the linearized Maxwell-Vlasov equations and find that
the damping rate and the proton-electron energy partition for Alfven waves have been
significantly modified in such plasmas, comparing to their counterparts without
electron drifts. We suggest that electron drift is an important factor to take into
account when considering the dissipation of Alfvénic turbulence in the solar wind. |
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