On the Biocoherence Analysis of Plasma Turbulence PDF Download
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Author: Kimitaka Itoh
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Author: K. Itoh
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Author: Yan Yang
Publisher: Springer
ISBN: 9811381496
Category : Science
Languages : en
Pages : 134
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Book Description
This book revisits the long-standing puzzle of cross-scale energy transfer and dissipation in plasma turbulence and introduces new perspectives based on both magnetohydrodynamic (MHD) and Vlasov models. The classical energy cascade scenario is key in explaining the heating of corona and solar wind. By employing a high-resolution hybrid (compact finite difference & WENO) scheme, the book studies the features of compressible MHD cascade in detail, for example, in order to approximate a real plasma cascade as “Kolmogorov-like” and to understand features that go beyond the usual simplified theories based on incompressible models. When approaching kinetic scales where plasma effects must be considered, it uses an elementary analysis of the Vlasov–Maxwell equations to help identify the channels through which energy transfer must be dissipated. In addition, it shows that the pressure–strain interaction is of great significance in producing internal energy. This analysis, in contrast to many other recent studies, does not make assumptions about wave-modes, instability or other specific mechanisms responsible for the dynamics – the results are direct consequences of the Vlasov–Maxwell system of equations. This is an important step toward understanding dissipation in turbulent collisionless plasma in space and astrophysics.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Book Description
The nonlinear nature of the plasma turbulence, as measured by bicoherence analysis, has been studied in stellarator (ATF and W7AS) and tokamak (PBXM) devices. In ATF, little nonlinear interaction is found in the scrape-off layer region whereas the strength of the coupling is enhanced in the edge plasma region where the level of fluctuations is consistent with the theoretical expectations from resistive interchange modes. In W7AS the level of bicoherence is significantly smaller than in ATF. The comparison ATF/W7AS/PBXM suggest the important role of the magnetic shear to determine nonlinear behavior of the turbulence. The level of bicoherence also depends on the plasma conditions: in particular, it increases at the H-mode transition. The comparison between the nonlinear behavior of the turbulence in tokamaks and stellarators allows experimental verification of theoretical turbulence models.
Author: Donald Eugene Hall
Publisher:
ISBN:
Category : Plasma turbulence
Languages : en
Pages : 144
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Author: D. Coca
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages :
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Author: H. L. Pécseli
Publisher:
ISBN: 9788755014428
Category :
Languages : en
Pages : 125
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Book Description
Author: Boudewijn Ph. van Milligen
Publisher:
ISBN: 9780750348560
Category : SCIENCE
Languages : en
Pages : 0
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Book Description
This book reviews some of the observations that reveal the complex nature of plasma turbulence in detail and explains their implications.
Author: V. N. Tsytovich
Publisher: Elsevier
ISBN: 1483139921
Category : Science
Languages : en
Pages : 144
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Book Description
An Introduction to the Theory of Plasma Turbulence is a collection of lectures given by the author at Culham laboratory. The book deals with developments on the theory of plasma turbulence. The author describes plasma properties in the turbulent regions as mostly non-linear in nature, and notes that these properties can be regarded as a universal spectrum independent of any type of instability. The text then discusses the general problems of the theory of plasma turbulence. The author also shows that elementary excitation of ""dressed"" particles have a finite lifetime associated with non-linear interactions. The book then discusses the excitation of ion-sound turbulence using different processes, for example, shock waves; the text also analyzes the kind of non-linear interactions present in such energy transfer. The author also explains the Langmuir plasma oscillations — a typical collective plasma motion that can be excited using different types of mechanism such as an electron beam. The book then describes the electromagnetic properties of turbulent plasma and relates the state of turbulent plasma as a natural occurrence in the universe. The book notes the problem of cosmic rays, not as an energy transfer to faster particles, but as an energy distribution between particles. The text will prove valuable for nuclear physicists, scientists, and academicians in the field of quantum mechanics.
Author: Boudewijn Philip Van Milligen
Publisher: IOP Series in Plasma Physics
ISBN: 9780750348546
Category :
Languages : en
Pages : 0
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Book Description
Fusion plasmas are extreme, strongly driven systems, far from thermodynamic equilibrium, in which turbulence plays a major role. This book presents and illustrates the use of a number of advanced analysis tools needed to characterize turbulence in this complex regime, thus achieving a deeper understanding.
Author: Benkadda Sadruddin
Publisher: World Scientific
ISBN: 9814547743
Category :
Languages : en
Pages : 460
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Book Description
Since the early developments of 'nonlinear science', plasma physics played a major role in its evolution: solitons, hamiltonian chaos, distinction between absolute and convective instabilities, and dynamics of coherent structures in turbulence. Understanding transport in plasmas is important for fusion devices but also for fundamental astrophysics, for fluid mechanics, for theoretical chemistry and engineering, and plasma processing in engineering.This second workshop gathered experts in plasma physics, nonlinear phenomena and mathematics. It aimed at enabling theoreticians, numericians and experimentalists in plasma turbulence to relate electromagnetic fluctuations, modes of self-organisation and transport processes. It may lead to developing new diagnostics and new methods for signal processing.
