Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Cowley, Steven"'
Motivated by explosive releases of energy in fusion, space and astrophysical plasmas, we consider the nonlinear stability of stratified magnetohydrodynamic (MHD) equilibria against interchanges of straight magnetic-flux tubes. We demonstrate that in
Externí odkaz:
http://arxiv.org/abs/2401.01336
In this paper, we investigate the kinetic stability of classical, collisional plasma - that is, plasma in which the mean-free-path $\lambda$ of constituent particles is short compared to the length scale $L$ over which fields and bulk motions in the
Externí odkaz:
http://arxiv.org/abs/2310.17754
Autor:
Brown, Benjamin, Forest, Cary, Nornberg, Mark, Zweibel, Ellen, Cattaneo, Fausto, Cowley, Steven
Plasma experiments in laboratory settings offer unique opportunities to address fundamental aspects of the solar dynamo and magnetism in the solar atmosphere. We argue here that ground-based laboratory experiments have direct connections to NASA base
Externí odkaz:
http://arxiv.org/abs/1101.0176
Autor:
Howes, Gregory G., Cowley, Steven C., Dorland, William, Hammett, Gregory W., Quataert, Eliot, Schekochihin, Alexander A.
Publikováno v:
AIPConf.Proc.932:3-8,2007
We present a cascade model for turbulence in weakly collisional plasmas that follows the nonlinear cascade of energy from the large scales of driving in the MHD regime to the small scales of the kinetic Alfven wave regime where the turbulence is diss
Externí odkaz:
http://arxiv.org/abs/0707.3149
Autor:
Howes, Gregory G., Cowley, Steven C., Dorland, William, Hammett, Gregory W., Quataert, Eliot, Schekochihin, Alexander A.
Publikováno v:
J. Geophys. Res. 113, A05103 (2008)
This paper studies the turbulent cascade of magnetic energy in weakly collisional magnetized plasmas. A cascade model is presented, based on the assumptions of local nonlinear energy transfer in wavenumber space, critical balance between linear propa
Externí odkaz:
http://arxiv.org/abs/0707.3147
Autor:
Howes, Gregory G., Cowley, Steven C., Dorland, William, Hammett, Gregory W., Quataert, Eliot, Schekochihin, Alexander A.
Publikováno v:
Astrophys.J.651:590-614,2006
Magnetohydrodynamic (MHD) turbulence is encountered in a wide variety of astrophysical plasmas, including accretion disks, the solar wind, and the interstellar and intracluster medium. On small scales, this turbulence is often expected to consist of
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511812
Publikováno v:
Science. 6/29/2018, Vol. 360 Issue 6396, p1381-1381. 1/7p.
Autor:
Maron, Jason, Cowley, Steven
We simulate the evolution of an initially weak magnetic field in forced turbulence for a range of Prandtl numbers. The field grows exponentially with the Kulsrud-Anderson $k^{3/2}$ spectrum until the magnetic energy approaches the viscous-scale kinet
Externí odkaz:
http://arxiv.org/abs/astro-ph/0111008
Publikováno v:
Phys.Rev.E65:016305,2002
A weak fluctuating magnetic field embedded into a turbulent conducting medium grows exponentially while its characteristic scale decays. In the ISM and protogalactic plasmas, the magnetic Pr is very large, so a broad spectrum of growing magnetic fluc
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105322
The effect of magnetic shear and shear flow on local gravitationally induced instabilities is investigated. A simple model is constructed allowing for an arbitrary entropy gradient and a shear plasma flow in the Boussinesq approximation. A transforma
Externí odkaz:
http://arxiv.org/abs/astro-ph/0102394