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Nonlinear mirror mode dynamics: Simulations and modeling

SYSNO ASEP	0311113
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Nonlinear mirror mode dynamics: Simulations and modeling
Title	Nelineární dynamika zrcadlového módu: simulace a modelováni
Author(s)	Califano, F. (IT) Hellinger, Petr (UFA-U)_{RID, ORCID} Kuznetsov, E. (RU) Passot, T. (FR) Sulem, P. L. (FR) Trávníček, Pavel (UFA-U)_{RID, ORCID}
Number of authors	6
Source Title	Journal of Geophysical Research - ISSN 0148-0227 Roč. 113, - (2008), A08219/1-A08219/20
Number of pages	20 s.
Publication form	www - www
Language	eng - English
Country	US - United States
Keywords	mirror instability ; nonlinear evolution ; numerical simulations ; magnetic holes ; mirror structures ; kinetic plasma instabilities
Subject RIV	BL - Plasma and Gas Discharge Physics
R&D Projects	IAA300420702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	IAA300420602 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z30420517 - UFA-U, BC-A (2005-2011)
UT WOS	000258515400002
DOI	10.1029/2007JA012898
Annotation	Hybrid numericalns of the Vlasov-Maxwell (VM) equations using both Lagrangian (particle in cells) and Eulerian integration schemes are presented and compared with asymptotic and phenomenological models for the nonlinear mirror mode dynamics. It turns out that magnetic holes do not result from direct nonlinear saturation of the mirror instability that rather leads to magnetic humps. Nevertheless, both above and below threshold, there exist stable solutions of the VM equations in the form of large-amplitude magnetic holes. Special attention is paid to the skewness of the magnetic fluctuations (that is negative for holes and positive for humps) and to its variations, depending on the distance to threshold and the beta of the plasma. Furthermore, the long-time evolution of magnetic humps resulting from the mirror instability in an extended domain far enough from threshold may, when the plasma beta is not too large, eventually lead to the formation of magnetic holes.
Workplace	Institute of Atmospheric Physics
Contact	Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019
Year of Publishing	2009

Number of the records: 1