A soliton gas model for astrophysical magnetized plasma turbulence

1982 ◽  
Vol 257 ◽  
pp. 855 ◽  
Author(s):  
S. R. Spangler ◽  
J. P. Sheerin
Keyword(s):  
Plasma Turbulence ◽  
Magnetized Plasma

A phenomenological theory of drift wave type plasma turbulence

1979 ◽  
Vol 21 (3) ◽  
pp. 423-429 ◽  
Author(s):  
Amiya K. Sen
Keyword(s):  
Phenomenological Theory ◽  
Plasma Turbulence ◽  
Magnetized Plasma ◽  
Wave Type ◽  
Hydrodynamic Turbulence ◽  
Drift Wave ◽  
Kolmogorov Spectrum ◽  
Strong Turbulence

A phenomenological theory of drift type turbulence in inhomogeneous magnetized plasma is developed in the spirit of the Kolmogorov spectrum of hydrodynamic turbulence. We model the spectrum in terms of subspectra: production, equilibrium and dissipation. Different nonlinearities and either weak or strong turbulence characterize different subspectra.

scholarly journals Fluidization of collisionless plasma turbulence

2019 ◽  
Vol 116 (4) ◽  
pp. 1185-1194 ◽  
Author(s):  
Romain Meyrand ◽  
Anjor Kanekar ◽  
William Dorland ◽  
Alexander A. Schekochihin
Keyword(s):  
Solar Wind ◽  
Power Law ◽  
Collisionless Plasma ◽  
Plasma Turbulence ◽  
Magnetized Plasma ◽  
Landau Damping ◽  
Astrophysical Plasmas ◽  
Phase Mixing ◽  
Fluid Turbulence ◽  
Collisionless Plasmas

In a collisionless, magnetized plasma, particles may stream freely along magnetic field lines, leading to “phase mixing” of their distribution function and consequently, to smoothing out of any “compressive” fluctuations (of density, pressure, etc.). This rapid mixing underlies Landau damping of these fluctuations in a quiescent plasma—one of the most fundamental physical phenomena that makes plasma different from a conventional fluid. Nevertheless, broad power law spectra of compressive fluctuations are observed in turbulent astrophysical plasmas (most vividly, in the solar wind) under conditions conducive to strong Landau damping. Elsewhere in nature, such spectra are normally associated with fluid turbulence, where energy cannot be dissipated in the inertial-scale range and is, therefore, cascaded from large scales to small. By direct numerical simulations and theoretical arguments, it is shown here that turbulence of compressive fluctuations in collisionless plasmas strongly resembles one in a collisional fluid and does have broad power law spectra. This “fluidization” of collisionless plasmas occurs, because phase mixing is strongly suppressed on average by “stochastic echoes,” arising due to nonlinear advection of the particle distribution by turbulent motions. Other than resolving the long-standing puzzle of observed compressive fluctuations in the solar wind, our results suggest a conceptual shift for understanding kinetic plasma turbulence generally: rather than being a system where Landau damping plays the role of dissipation, a collisionless plasma is effectively dissipationless, except at very small scales. The universality of “fluid” turbulence physics is thus reaffirmed even for a kinetic, collisionless system.

scholarly journals A Look at Phase Space Intermittency in Magnetized Plasma Turbulence

2019 ◽  
Vol 886 (1) ◽  
pp. 65
Author(s):  
Bogdan Teaca ◽  
Alejandro Bañón Navarro ◽  
Daniel Told ◽  
Tobias Görler ◽  
Gabriel Plunk ◽  
...  
Keyword(s):  
Phase Space ◽  
Plasma Turbulence ◽  
Magnetized Plasma

Magnetized-Plasma Turbulence

1982 ◽  
Vol T2B ◽  
pp. 522-524 ◽  
Author(s):  
D ter Haar
Keyword(s):  
Plasma Turbulence ◽  
Magnetized Plasma
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