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On the role of wave-particle interactions in the evolution of solar wind ion distribution functions
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SYSNO ASEP 0355922 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název On the role of wave-particle interactions in the evolution of solar wind ion distribution functions Tvůrce(i) Matteini, L. (FR)
Landi, S. (IT)
Velli, M. (US)
Hellinger, Petr (UFA-U) RID, ORCIDZdroj.dok. Twelfth International Solar Wind Conference. Proceedings Paper. - New York : Melville, 2010 / Maksimovic M. ; Issautier K. ; Meyer-Vernet N. ; Moncuquet M. ; Pantellini F. - ISSN 0094-243X - ISBN 978-0-7354-0759-6 Rozsah stran s. 223-226 Poč.str. 4 s. Akce International Solar Wind Conference /12./ Datum konání 21.06.2009-26.06.2009 Místo konání Saint-Milo Země FR - Francie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Solar Wind ; Plasma Simulations ; Kinetic Physics ; Wave-Particle Interactions Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000281438100053 EID SCOPUS 77952033539 DOI 10.1063/1.3396299 Anotace We investigate the role of kinetic effects in the solar wind expansion using 1-D numerical hybrid simulations. The analysis of proton distribution functions in the solar wind shows a non-adiabatic evolution and suggests that several kinetic processes are at work during the expansion. From simulation studies wave-particle and wave-wave interactions, as cyclotron heating and non-linear trapping due to parametric instabilities, are found to play an important role on constraining the proton temperature anisotropy and generating secondary velocity beams. We report results from hybrid comoving simulations that self-consistently retain and describe these processes. We find that cyclotron interactions control the evolution of the proton temperature anisotropy with distance providing a perpendicular heating which contrasts the adiabatic cooling caused by the expansion. At the same time ion-acoustic modes driven by parametric effects produce a velocity beam in the proton distribution function. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2011
Počet záznamů: 1