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Generation and dissipation of Alfvén-cyclotron turbulence in the solar corona and solar wind and related ion differential heating and acceleration

Yana Maneva

ISBN 10: 3942171392 / ISBN 13: 9783942171397
Published by Uni - Edition Gmbh Jan 2011, 2011
New Condition: Neu Soft cover
From Agrios-Buch (Bergisch Gladbach, Germany)

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Neuware - Nonthermal ion velocity distribution functions are ubiquitous in the fast solar wind, which is permeated by large-amplitude Alfvén waves and plasma wave turbulence, including ion-cyclotron waves. Remote sensing of the solar corona by means of ultraviolet spectroscopy and modeling of in situ measured data indicate that similar anisotropic kinetic ion features are present also in the solar atmosphere, especially in coronal holes where Alfvén waves are considered to be important. In the present work we have investigated the role of parametric instabilities and the consequent wave-particle interactions of parallel monochromatic nonlinear Alfvén-cyclotron waves with solar wind ions as a possible source for the anisotropic preferential ion heating and differential acceleration, as observed both in coronal holes and the fast solar wind. After the onset of parametric instabilities, particles are trapped in the potential well of daughter ion-acoustic waves, whose Landau damping results in parallel ion heating and differential acceleration. Simultaneously, ion beams are formed and nonlinear pitch-angle scattering leads to particle heating transverse to the direction of the background magnetic field. The ion beams are found to be rather persistent and long lived. Simultaneously, the minor ions are differentially accelerated and preferentially heated up to a more than mass proportional temperature ratio, as observed in situ in the fast solar wind. Heavy ions exhibit preferential and anisotropic heating as well, and their differential acceleration is investigated. 134 pp. Englisch. Bookseller Inventory # 9783942171397

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Title: Generation and dissipation of ...

Publisher: Uni - Edition Gmbh Jan 2011

Publication Date: 2011

Binding: Taschenbuch

Book Condition:Neu

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