Strongly Magnetized Classical Plasma Models
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Strongly Magnetized Classical Plasma Models
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Author : David Campbell Montgomery
language : en
Publisher:
Release Date : 1972
Strongly Magnetized Classical Plasma Models written by David Campbell Montgomery and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Plasma (Ionized gases) categories.
Nuclear Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1976
Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Nuclear energy categories.
Magnetized Plasma Pressure Filaments
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Author : Scott Graham Karbashewski
language : en
Publisher:
Release Date : 2021
Magnetized Plasma Pressure Filaments written by Scott Graham Karbashewski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Plasma (Ionized gases) categories.
One of the prominent areas of interest in current plasma science is focused on understanding the mechanisms of heat transport beyond classical Coulomb collisions. The topic has applications in many areas of plasma physics, such as the solar corona and nuclear fusion devices. In strongly magnetized plasmas the thermal conductivity parallel to the magnetic field is numerically quite large and orders of magnitude larger than the transverse conductivity; thus, the effective study of heat transport in these conditions requires a large system that is much longer along the magnetic axis than across. In this thesis, results are presented from basic heat transport experiments using magnetized plasma pressure filaments. The experiments are performed in the Large Plasma Device (LAPD) at the Basic Plasma Science Facility (BaPSF) at the University of California, Los Angeles (UCLA). A cerium hexaboride crystal cathode injects low-energy electrons along a magnetic field into the centre of a preexisting, cold, quiescent plasma forming a hot electron filament embedded in a colder plasma. Previous experiments observed gradient-driven drift-Alfvén waves that lead to enhanced cross-field transport; and a spontaneous thermal diffusion wave that was speculated to meet a quarter-wave resonance of the filament length. In the first set of experiments, a low amplitude sinusoidal perturbation is added to the cathode discharge bias that creates an oscillating heat source capable of driving large amplitude electron temperature oscillations. Langmuir probes are used to measure the amplitude and phase of the thermal wave field over a wide range of driver frequencies. The results are used to verify the excitation of thermal waves in magnetized plasma and confirm the presence of thermal resonances of the filament. The diagnostic potential of thermal waves is demonstrated through measurement of the parallel thermal diffusivity and distinguishing between classical transport, drift-Alfvén growth, and turbulent transport regimes using the cross-field structure. Two models for the thermal wave field are investigated and used to describe the experiment results; a two-dimensional homogeneous model based on a Green function approach and a one-dimensional inhomogeneous model based on a classical mechanics approach using the Hamilton-Jacobi equation. The second set of experiments have used three crystal cathodes in a triangular configuration to investigate the interactions between multiple pressure filaments with varying separation distances. The results are used to establish the scale length of interaction between the filaments. Within an electron skin depth, enhanced cross-field transport from chaotic E × B mixing rapidly relaxes the gradients in the inner triangular region of the filaments and leads to the growth of global nonlinear drift-Alfvén modes that are driven by the thermal gradient in the outer region of the filament bundle. Linear stability analysis of the temperature, density, and transverse flow profiles is used to accurately predict the observed wave modes. Coupling between the global modes leads to large intermittent transport events that are characterized by exponential frequency spectra and Lorentzian-shaped pulses that are signatures of chaotic dynamics. Mode decomposition and conditional averaging are used to reconstruct the pulse events and demonstrate that they are driven by nonlinear interactions between drift-Alfvén wave modes. The time series analysis tools of the complexity-entropy plane and Hurst exponent are used to investigate the chaotic nature and memory of the intermittent fluctuations. Last, the addition of a sinusoidal driver to one of the filaments in the configuration facilitates driving of the drift-Alfvén modes. The driver is shown to synchronize with several eigenmodes at once due to the asymmetric perturbation.
Introduction To Plasma Dynamics
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Author : A. I. Morozov
language : en
Publisher: CRC Press
Release Date : 2012-12-06
Introduction To Plasma Dynamics written by A. I. Morozov and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
As the twenty-first century progresses, plasma technology will play an increasing role in our lives, providing new sources of energy, ion-plasma processing of materials, wave electromagnetic radiation sources, space plasma thrusters, and more. Studies of the plasma state of matter not only accelerate technological developments but also improve the
Nuclear Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1972-06
Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972-06 with Nuclear energy categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Quantum Plasmas
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Author : Fernando Haas
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-08-27
Quantum Plasmas written by Fernando Haas and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-08-27 with Science categories.
This book provides an overview of the basic concepts and new methods in the emerging scientific area known as quantum plasmas. In the near future, quantum effects in plasmas will be unavoidable, particularly in high density scenarios such as those in the next-generation intense laser-solid density plasma experiment or in compact astrophysics objects. Currently, plasmas are in the forefront of many intriguing questions around the transition from microscopic to macroscopic modeling of charged particle systems. Quantum Plasmas: an Hydrodynamic Approach is devoted to the quantum hydrodynamic model paradigm, which, unlike straight quantum kinetic theory, is much more amenable to investigate the nonlinear realm of quantum plasmas. The reader will have a step-by-step construction of the quantum hydrodynamic method applied to plasmas. The book is intended for specialists in classical plasma physics interested in methods of quantum plasma theory, as well as scientists interested in common aspects of two major areas of knowledge: plasma and quantum theory. In these chapters, the quantum hydrodynamic model for plasmas, which has continuously evolved over the past decade, will be summarized to include both the development and applications of the method.
Fusion Energy Update
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Author :
language : en
Publisher:
Release Date : 1979
Fusion Energy Update written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Controlled fusion categories.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1990
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Power resources categories.
Literature 1985 Part 2
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Author : S. Böhme
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-12-14
Literature 1985 Part 2 written by S. Böhme and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-14 with Science categories.
Astronomy and Astrophysics Abstracts aims to present a comprehensive documen tation ofthe literatme concerning all aspects of astronomy, astrophysics, and their border fields. lt is devoted to the recording, summarizing, and indexing of the relevant publications throughout the world. Astronomy and Astrophysics Abstracts is prepared by a special department of the Astronomisches Rechen-Institut under the auspices of the International Astronomical Union. Volume 40 records literatme published in 1985 and received before February 15, 1986. Some older documents which we received late and which arenot surveyed in earlier volumes are included too. We acknowledge with thanks contributions of our colleagues all over the world. We also express our gratitude to all organiza tions, observatories, and publishers which provide us with complimentary copies of their publications. Starting with Volume 33, all the recording, correction, and data processing work was dorre by means of computers. The recording was dorre by om technical staff members Ms. Helga Ballmann, Ms. Mona El-Choura (t), Ms. Monika Kohl, Ms. Sylvia Matyssek. Ms. Karirr Burkhardt, Ms. Susanne Schlötelbmg, Mr. Mar tin Schlötelburg, and Mr. Stefan Wagner supported om task by careful proof reading. lt is a pleasure to thank them all for their encomagement.