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Author: Kamel Ourabah
Publisher: John Wiley & Sons
ISBN: 1786307693
Category : Science
Languages : en
Pages : 196
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Book Description
The Universe is made up of systems consisting of a very large number of particles interacting in a very complex way. When studying these systems, a precise microscopic approach is unattainable. In practice, the best strategy is one that is able to “distinguish” between superfluous information and the information needed to make predictions about the evolution of the system. There are two main competing approaches: kinetic and hydrodynamic. Collective Phenomena in Plasmas and Elsewhere presents an overview of the theoretical bases of these kinetic and hydrodynamic approaches, but also discusses their limitations, the links between them and their extension to quantum mechanics and relativity. These methods were born in part out of the study of plasmas, but they also have more universal applications. A general framework for these approaches is outlined, followed by some applications in plasmas, gravitation, Bose–Einstein condensates and dark matter. Particular emphasis is placed on the analogies that can be made between all these different systems.
Author: Kamel Ourabah
Publisher: John Wiley & Sons
ISBN: 1786307693
Category : Science
Languages : en
Pages : 196
Get Book Here
Book Description
The Universe is made up of systems consisting of a very large number of particles interacting in a very complex way. When studying these systems, a precise microscopic approach is unattainable. In practice, the best strategy is one that is able to “distinguish” between superfluous information and the information needed to make predictions about the evolution of the system. There are two main competing approaches: kinetic and hydrodynamic. Collective Phenomena in Plasmas and Elsewhere presents an overview of the theoretical bases of these kinetic and hydrodynamic approaches, but also discusses their limitations, the links between them and their extension to quantum mechanics and relativity. These methods were born in part out of the study of plasmas, but they also have more universal applications. A general framework for these approaches is outlined, followed by some applications in plasmas, gravitation, Bose–Einstein condensates and dark matter. Particular emphasis is placed on the analogies that can be made between all these different systems.
Author: Kamel Ourabah
Publisher: John Wiley & Sons
ISBN: 1394236743
Category : Science
Languages : en
Pages : 196
Get Book Here
Book Description
The Universe is made up of systems consisting of a very large number of particles interacting in a very complex way. When studying these systems, a precise microscopic approach is unattainable. In practice, the best strategy is one that is able to “distinguish” between superfluous information and the information needed to make predictions about the evolution of the system. There are two main competing approaches: kinetic and hydrodynamic. Collective Phenomena in Plasmas and Elsewhere presents an overview of the theoretical bases of these kinetic and hydrodynamic approaches, but also discusses their limitations, the links between them and their extension to quantum mechanics and relativity. These methods were born in part out of the study of plasmas, but they also have more universal applications. A general framework for these approaches is outlined, followed by some applications in plasmas, gravitation, Bose–Einstein condensates and dark matter. Particular emphasis is placed on the analogies that can be made between all these different systems.
Author: Evgeniĭ Dmitrievich Volkov
Publisher: CRC Press
ISBN: 9782881240164
Category : Science
Languages : en
Pages : 272
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Book Description
Author: Keith I. Thomassen
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 80
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Book Description
The objective of this research was to find experimental evidence of an 'anomalous' resistance in plasmas. Anomalous resistance results when collective action by electrons causes randomization of the growing oscillations in the two-stream instability. This sequence of events leading to dissipation of energy was predicted several years ago by Buneman. It is believed that this objective was achieved (i.e., that anomalous resistance is evidenced by observations to be reported here), on a high density plasma subjected to r-f fields by a cavity resonant at a frequency well below the plasma frequency. With sufficient r-f power and density, the two-stream instability should be excited to turbulence level during each halfcycle, causing irreversible power loss. Calculations enumerating the necessary conditions for observing the phenomena were made, showing that the resistance can easily be seen above the intrinsic cavity loss using very moderate amounts of power. (Author).
Author: Stanford University Stanford Electronics Laboratories
Publisher:
ISBN:
Category :
Languages : en
Pages : 62
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Book Description
Author: Wellalage Don Suranga Ruhunusiri
Publisher:
ISBN:
Category : Dusty plasmas
Languages : en
Pages : 106
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Book Description
I also find that the compressibility, a measure of the coupling between the dust particles, have a strong effect on the wave propagation. Comparing the kinetic vs. hydrodynamic descriptions for ions, I find that under typical laboratory conditions the inverse Landau damping and the ion-neutral collisions contribute about equally to the dust acoustic instability. Third, I performed dust acoustic wave experiments to resolve a previously unremarked discrepancy in the literature regarding the sign of the compressibility of a strongly-coupled dust component in a dusty plasma. According to theories compressibility is negative, whereas experiments suggest that it is positive. I find that the compressibility is positive. This conclusion was reached after allowing for a wide range of experimental uncertainties and model dependent systematic errors. Finally, the polygon construction method of Glaser and Clark was used to characterize crystallization and melting in a single-layer dusty plasma. Using particle positions measured in a previous dusty plasma experiment, I identified geometrical defects, which are polygons with four or more sides. These geometrical defects are found to proliferate during melting. I also identify a possibility of latent heat involvement in melting and crystallization processes of a dusty plasma.
Author: Società italiana di fisica
Publisher: IOS Press
ISBN: 1614992274
Category : Science
Languages : en
Pages : 528
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Book Description
This book illustrates new developments in the fields of space and solar physics, stellar physics, extragalactic physics and cosmology. It also elaborates upon the progress of laboratory plasma physics. One of the topics discussed is the existence of collective processes, both linear and non-linear, that can explain key elements of accretion physics, magnetic reconnection, the formation of ‘strange’ particle distributions, particle scattering phenomena, etc. Astrophysical plasma are dominated by turbulent or quasi-turbulent processes which interactively associate instabilities, radiation processes and plasma-wave scattering. The resulting scenario, which is outside thermodynamics and conventional statistical physics, is too difficult to describe theoretically, but today there are large-scale experiments and powerful computational tools allowing for the exploration of an almost similarly complex variety of phenomena. Several contributions to this book present indications of the influence of nonlinear phenomena in astrophysical applications. This work marks the fast growth of plasma astrophysics thanks to new observations in the high energy band of the spectrum on the one hand and the possibility of validating and bringing to light relevant new theories by increasingly sophisticated machines on the other.
Author:
Publisher: John Wiley & Sons
ISBN:
Category :
Languages : en
Pages : 64
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Book Description
Author: Giuseppe Bertin
Publisher: American Institute of Physics
ISBN:
Category : Science
Languages : en
Pages : 482
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Book Description
The volume illustrates the State of the art and new directions in plasma physics, space physics, and astrophysics. It covers several hot topics of interdisciplinary interest where progress is made by the use of joint expertise. It summarizes an unusually lively symposium that has gathered world experts with a broad spectrum of research interests. Interdisciplinary meetings at the border between plasma physics and astrophysics are becoming increasingly important. In the recent past, several proceedings volumes have been devoted to astrophysical plasmas. This volume has the unique feature of being professional but not specialized, because it covers an unusually broad spectrum of topics under the common theme of the study of complex and collective phenomena in macroscopic systems, from the scale of laboratory plasma experiments to the scale of the universe. Included are: - basic plasma processes - space plasmas, planetary plasmas, and the heliosphere - solar and stellar plasmas - plasmas around compact objects - plasmas in galaxies - plasmas in clusters of galaxies - cosmological plasmas - testing plasma astrophysics in the laboratory
Author:
Publisher:
ISBN:
Category : Broadcasting
Languages : en
Pages : 472
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Book Description
