onr:"swepub:oai:research.chalmers.se:bf4fb044-2174-40f2-b61a-30a2c4dd5c86"
Sökning: onr:"swepub:oai:research.chalmers.se:bf4fb044-2174-40f2-b61a-30a2c4dd5c86" > Astrophysical gyrok...
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04082naa a2200385 4500 | |
| 001 | oai:research.chalmers.se:bf4fb044-2174-40f2-b61a-30a2c4dd5c86 | |
| 003 | SwePub | |
| 008 | 180517s2018 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/5104942 URI |
| 024 | 7 | a https://research.chalmers.se/publication/5031482 URI |
| 024 | 7 | a https://doi.org/10.1017/S00223778180002962 DOI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Kunz, M. W.u Princeton University4 aut |
| 245 | 1 0 | a Astrophysical gyrokinetics: turbulence in pressure-anisotropic plasmas at ion scales and beyond |
| 264 | 1 | c 2018 |
| 520 | a We present a theoretical framework for describing electromagnetic kinetic turbulence in a multi-species, magnetized, pressure-anisotropic plasma. The turbulent fluctuations are assumed to be small compared to the mean field, to be spatially anisotropic with respect to it and to have frequencies small compared to the ion cyclotron frequency. At scales above the ion-Larmor radius, the theory reduces to the pressure-anisotropic generalization of kinetic reduced magnetohydrodynamics (KRMHD) formulated by Kunz et al. (J. Plasma Phys., vol. 81, 2015, 325810501). At scales at and below the ion-Larmor radius, three main objectives are achieved. First, we analyse the linear response of the pressure-anisotropic gyrokinetic system, and show it to be a generalization of previously explored limits. The effects of pressure anisotropy on the stability and collisionless damping of Alfvenic and compressive fluctuations are highlighted, with attention paid to the spectral location and width of the frequency jump that occurs as Alfven waves transition into kinetic Alfven waves. Secondly, we derive and discuss a very general gyrokinetic free-energy conservation law, which captures both the KRMHD free-energy conservation at long wavelengths and dual cascades of kinetic Alfven waves and ion entropy at sub-ion-Larmor scales. We show that non-Maxwellian features in the distribution function change the amount of phase mixing and the efficiency of magnetic stresses, and thus influence the partitioning of free energy amongst the cascade channels. Thirdly, a simple model is used to show that pressure anisotropy, even within the bounds imposed on it by firehose and mirror instabilities, can cause order-of-magnitude variations in the ion-to-electron heating ratio due to the dissipation of Alfvenic turbulence. Our theory provides a foundation for determining how pressure anisotropy affects turbulent fluctuation spectra, the differential heating of particle species and the ratio of parallel and perpendicular phase mixing in space and astrophysical plasmas. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Strömningsmekanik och akustik0 (SwePub)203062 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Fluid Mechanics and Acoustics0 (SwePub)203062 hsv//eng |
| 650 | 7 | a NATURVETENSKAPx Fysikx Fusion, plasma och rymdfysik0 (SwePub)103032 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Fusion, Plasma and Space Physics0 (SwePub)103032 hsv//eng |
| 653 | a astrophysical plasmas | |
| 700 | 1 | a Abel, Ian,d 1985u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)ianab |
| 700 | 1 | a Klein, K. G.u University of Arizona,University of Michigan4 aut |
| 700 | 1 | a Schekochihin, A. A.u University Of Oxford4 aut |
| 710 | 2 | a Princeton Universityb Chalmers tekniska högskola4 org |
| 773 | 0 | t Journal of Plasma Physicsg 84:2q 84:2x 0022-3778x 1469-7807 |
| 856 | 4 8 | u https://research.chalmers.se/publication/510494 |
| 856 | 4 8 | u https://research.chalmers.se/publication/503148 |
| 856 | 4 8 | u https://doi.org/10.1017/S0022377818000296 |
Hitta via bibliotek
- Journal of Plasma Physics (Sök värdpublikationen i LIBRIS)
Till lärosätets databas
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Hitta mer i SwePub
- Av författaren/redakt...
- Kunz, M. W.
- Abel, Ian, 1985
- Klein, K. G.
- Schekochihin, A. ...
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Fysik
- och Atom och molekyl ...
-
- TEKNIK OCH TEKNOLOGIER
- TEKNIK OCH TEKNO ...
- och Maskinteknik
- och Strömningsmekani ...
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Fysik
- och Fusion plasma oc ...
- Artiklar i publikationen
- Journal of Plasm ...
- Av lärosätet
- Chalmers tekniska högskola
Sök utanför SwePub
- Sök vidare i:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - Nationella bibliotekssystem
- LIBRIS.kb.se
