Journal ArticleDOI
Development of the concepts of plasma turbulence
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TLDR
In this article, a review is devoted to exposition of the physical principles on which the current ideas on plasma turbulence are based, and a comparison is made of the results obtained in the theory of plasma turbulence and the turbulence of incompressible liquids.Abstract:
The review is devoted to exposition of the physical principles on which the current ideas on plasma turbulence are based. A comparison is made of the results obtained in the theory of plasma turbulence and the turbulence of incompressible liquids. The basic physical differences between hydrodynamic and plasma turbulence are pointed out. It is shown how the concepts of turbulent excitations arise in the statistical description of turbulence. The fundamental difference is pointed out between turbulent elementary excitations and elementary excitations describing a state close to thermodynamic equilibrium. Special emphasis is given to explanation of the physical meaning of the concept of effective turbulent collisions. It is shown that inclusion of turbulent collisions does not make possible construction of a theory of weak turbulence on the basis of simple expansions of the interaction in the turbulence energy. Examples are presented which show that effective turbulent collisions can fundamentally change the theoretical predictions which must be compared with existing experiments. It is shown how the inclusion of effective turbulent collisions permits construction of a theory of correlation functions of turbulent plasma fields. In connection with the discussion of new approaches to the theory of weak turbulence, taking into account effective turbulent collisions, an analysis is carried out of the theories of anomalous electrical conductivity of a plasma in an external electric field.read more
Citations
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Dust plasma crystals, drops, and clouds
TL;DR: The experimental and theoretical aspects of the dust particle phenomenon are discussed in this article, including dust particle attraction in open systems (in spite of charges of up to 105e on individual particles); dust molecule formation; large (100 eV and higher) values of the binding energy; self-contraction instabilities (similar to and operating together with gravitational instability in cosmic structures); free boundary dust-plasma crystals; new dust attraction mechanisms; the growth and agglomeration of dust particles; and the development of long order in dust plasmas.
Journal ArticleDOI
Coherent emission mechanisms in astrophysical plasmas
TL;DR: The early development and subsequent refinements of coherent emission theory, motivated by application to solar radio bursts, are reviewed in this article, and a possible direct measure of coherence is pointed out.
Journal ArticleDOI
Coherent Emission Mechanisms in Astrophysical Plasmas
TL;DR: Three known examples of coherent emission in radio astronomical sources are reviewed in this article : plasma emission, electron cyclotron maser emission (ECME) and pulsar radio emission.
Journal ArticleDOI
Re-normalized quasi-linear approximation of plasma turbulence: Part 1. Modification of the Weinstock weak-coupling limit
Jacques Misguich,Radu Balescu +1 more
TL;DR: In this article, a re-normalized expansion for the solution of the fluctuating Vlasov equation for turbulent plasmas is presented for the weak-coupling approximation.
Journal ArticleDOI
Aspects of a renormalized weak plasma turbulence theory
John A. Krommes,Robert G. Kleva +1 more
TL;DR: A renormalized Vlasov turbulence theory, derived by neglecting a mode coupling term in the direct interaction approximation, is discussed in this article, which reduces correctly to weak turbulence theory; it predicts both diffusion and polarization effects of the turbulent medium on test particles.
References
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Journal ArticleDOI
Calculation of the spectra of stationary plasma turbulence
TL;DR: In this paper, the stationary spectrum of the plasma turbulence is found by means of a computer and the numerical results obtained are compared with analytical results obtained for an asymptotic region of wave numbers.