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| Titel |
Energetics of Landau and non-Landau linear damping |
| VerfasserIn |
T. Chust, G. Belmont, F. Mottez, S. Hess |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250022749
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| Zusammenfassung |
| Many papers have shown that estimating the energy exchanges in linear Langmuir waves can
lead, under certain assumptions, to a continuous averaged dissipation from electric to kinetic
energy, with a wave damping rate equal to the classical Landau’s value γL. Considering the
existence of non-Landau solutions evidenced in a recent paper [Belmont et al., PoP 2008], the
dissipation process is revisited in a more general way. As this paper has provided one with an
explicit form of the perturbed distribution function, the different energy exchanges
can indeed be calculated now explicitly. It is shown that the energy calculations,
when complete, are indeed in full agreement with the existence of non-Landau
solutions, which means that the Landau damping rate is not unique when the initial
distribution functions corresponding to the non-Landau solutions are not excluded. |
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