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| Description
| - We investigate the effect of a slow expansion on a magnetosheath plasma and magnetosheath low-frequency turbulence using a two-dimensional hybrid expanding box simulation. We start our simulation with a high beta plasma almost stable with respect to the mirror and proton cyclotron instabilities. The expansion leads to a continuous decrease of proton beta and drives the increase of the proton temperature anisotropy. Both mirror and proton cyclotron waves appear. The system establishes a marginally stable state with respect to both mirror and proton cyclotron instabilities. During the first phase of the simulation the mirror waves dominate over the proton cyclotron waves, latter, in the low beta region the proton cyclotron waves become dominant. Our results also support the observational possibility of mirror mode waves in plasmas with a negative growth rate (The phenomenon of bistability). We also include an initial comparison with observations made by the Cluster spacecraft.
- We investigate the effect of a slow expansion on a magnetosheath plasma and magnetosheath low-frequency turbulence using a two-dimensional hybrid expanding box simulation. We start our simulation with a high beta plasma almost stable with respect to the mirror and proton cyclotron instabilities. The expansion leads to a continuous decrease of proton beta and drives the increase of the proton temperature anisotropy. Both mirror and proton cyclotron waves appear. The system establishes a marginally stable state with respect to both mirror and proton cyclotron instabilities. During the first phase of the simulation the mirror waves dominate over the proton cyclotron waves, latter, in the low beta region the proton cyclotron waves become dominant. Our results also support the observational possibility of mirror mode waves in plasmas with a negative growth rate (The phenomenon of bistability). We also include an initial comparison with observations made by the Cluster spacecraft. (en)
- Studujeme vliv pomalé expanze na plazma a nízkofrekvenční vlny v magnetoobálce pomocí dvoudimenzionální hybridní simulace v expandující krabici. Simulace začíná v oblasti velké bety, kde je plazma téměř stabiliní vůči zrcadlové a protonové cyklotronní nestabilitě. Expanze vede k neustálemu poklesu bety a k růstu protonové teplotní anisotropie; zrcadlové i cyklotronní vlny se brzy objevují. System se ustaví na marginální stabilitě vůči těmto nestabilitám. V první fázi zrcadlove vlny jsou dominantní, později v oblasti malých bet to jsou protonové cyklotronní vlny. Naše výsledky ukazují možnost pozorování zrcadlových vln i v oblasti, kde jsou lineárně stabilní (bistabilita). První výsledky srovnání s pozorováními družic Cluster II jsou také prezentovány. (cs)
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| Title
| - Magnetosheath plasma expansion: Hybrid simulations
- Expanze plazmatu v magnetoobálce: hybridní simulace (cs)
- Magnetosheath plasma expansion: Hybrid simulations (en)
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| skos:prefLabel
| - Magnetosheath plasma expansion: Hybrid simulations
- Expanze plazmatu v magnetoobálce: hybridní simulace (cs)
- Magnetosheath plasma expansion: Hybrid simulations (en)
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| skos:notation
| - RIV/68378289:_____/07:00088736!RIV08-GA0-68378289
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA205/05/1011), P(IAA300420602), Z(AV0Z30420517)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/68378289:_____/07:00088736
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - numerical simulations; marginal stability; mirror instability; proton cyclotron instability; hybrid simulations (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Geophysical Research Letters
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Escoubet, C. P.
- Trávníček, Pavel
- Dandouras, I.
- Hellinger, Petr
- Lucek, E.
- Taylor, M. G. G. T.
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| is http://linked.open...avai/riv/vysledek
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