Počet záznamů: 1
Proton core-beam system in the expanding solar wind: Hybrid simulations
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SYSNO ASEP 0373443 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Proton core-beam system in the expanding solar wind: Hybrid simulations Tvůrce(i) Hellinger, Petr (ASU-R) RID, ORCID
Trávníček, Pavel M. (UFA-U) RID, ORCIDZdroj.dok. Journal of Geophysical Research - ISSN 0148-0227
Roč. 116, A11 (2011), A11101/1-A11101/13Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova ELECTROMAGNETIC PROTON/PROTON INSTABILITIES ; VELOCITY SPACE DIFFUSION ; WAVE-WAVE SCATTERING ; TEMPERATURE ANISOTROPY ; PLASMA ; DRIFT ; DISTRIBUTIONS Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP IAA300420702 GA AV ČR - Akademie věd CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) AV0Z10030501 - ASU-R (2005-2011) UT WOS 000297062700003 DOI 10.1029/2011JA016940 Anotace Results of a two-dimensional hybrid expanding box simulation of a proton beam-core system in the solar wind are presented. The expansion with a strictly radial magnetic field leads to a decrease of the ratio between the proton perpendicular and parallel temperatures as well as to an increase of the ratio between the beam-core differential velocity and the local Alfven velocity creating a free energy for many different instabilities. The system is indeed most of the time marginally stable with respect to the parallel magnetosonic, oblique Alfven, proton cyclotron and parallel fire hose instabilities which determine the system evolution counteracting some effects of the expansion and interacting with each other. Nonlinear evolution of these instabilities leads to large modifications of the proton velocity distribution function. The beam and core protons are slowed with respect to each other and heated, and at later stages of the evolution the two populations are not clearly distinguishable. 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 2012 Elektronická adresa http://www.agu.org/pubs/crossref/2011/2011JA016940.shtml
Počet záznamů: 1