Abstract
| Language | English |
|---|---|
| Pages | 042306-1 |
| Number of pages | 42305 |
| Journal | Physics of Plasmas |
| Volume | 16 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 2009 |
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Keywords
- laser produced plasmas
- large scale structure
- weibel instability
- fields
- turbulence
- vortices
- waves
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Dynamics of nonlinearly interacting magnetic electron drift vortex modes in a nonuniform plasma. / Eliasson, Bengt; Shukla, P.K.; Pavlenko, V.P.
In: Physics of Plasmas, Vol. 16, No. 4, 04.2009, p. 042306-1.Research output: Contribution to journal › Article
TY - JOUR
T1 - Dynamics of nonlinearly interacting magnetic electron drift vortex modes in a nonuniform plasma
AU - Eliasson, Bengt
AU - Shukla, P.K.
AU - Pavlenko, V.P.
PY - 2009/4
Y1 - 2009/4
N2 - A simulation study of dynamical evolution of nonlinearly interacting two-dimensional magnetic electron drift vortex (MEDV) modes in a nonuniform plasma is presented. Depending on the equilibrium density and temperature gradients, the system can either be stable or unstable. The unstable system reveals spontaneous generation of magnetic fields from noise level, and large-scale magnetic field structures are formed. When the system is linearly stable, one encounters MEDV mode turbulence in which there is a competition between zonons (zonal flows) and streamers. For large MEDV mode amplitudes, one encounters the formation of localized and small-scale magnetic vortices and vortex pairs with scale sizes of the order of the electron skin depth. The MEDV turbulence exhibits nonuniversal (non-Kolmogorov-type) spectra for different sets of plasma parameters. The relevance of this work to laboratory and cosmic plasmas is briefly mentioned.
AB - A simulation study of dynamical evolution of nonlinearly interacting two-dimensional magnetic electron drift vortex (MEDV) modes in a nonuniform plasma is presented. Depending on the equilibrium density and temperature gradients, the system can either be stable or unstable. The unstable system reveals spontaneous generation of magnetic fields from noise level, and large-scale magnetic field structures are formed. When the system is linearly stable, one encounters MEDV mode turbulence in which there is a competition between zonons (zonal flows) and streamers. For large MEDV mode amplitudes, one encounters the formation of localized and small-scale magnetic vortices and vortex pairs with scale sizes of the order of the electron skin depth. The MEDV turbulence exhibits nonuniversal (non-Kolmogorov-type) spectra for different sets of plasma parameters. The relevance of this work to laboratory and cosmic plasmas is briefly mentioned.
KW - laser produced plasmas
KW - large scale structure
KW - weibel instability
KW - fields
KW - turbulence
KW - vortices
KW - waves
UR - http://dx.doi.org/10.1063/1.3103785
U2 - 10.1063/1.3103785
DO - 10.1063/1.3103785
M3 - Article
VL - 16
SP - 42306
EP - 42301
JO - Physics of Plasmas
T2 - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 4
ER -