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Force Free Magnetic Fields
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Book Synopsis Force-free Magnetic Fields by : Gerald E. Marsh
Download or read book Force-free Magnetic Fields written by Gerald E. Marsh and published by World Scientific. This book was released on 1996 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: After an introductory chapter concerned with the history of force-free magnetic fields, and the relation of such fields to hydrodynamics and astrophysics, the book examines the limits imposed by the virial theorem for finite force-free configurations. Various techniques are then used to find solutions to the field equations. The fact that the field lines corresponding to these solutions have the common feature of being ?twisted?, and may be knotted, motivates a discussion of field line topology and the concept of helicity. The topics of field topology, helicity, and magnetic energy in multiply connected domains make the book of interest to a rather wide audience. Applications to solar prominence models, type-II superconductors, and force-reduced magnets are also discussed. The book contains many figures and a wealth of material not readily available elsewhere.
Book Synopsis Force-free Magnetic Fields: Solutions, Topology And Applications by : Gerald E Marsh
Download or read book Force-free Magnetic Fields: Solutions, Topology And Applications written by Gerald E Marsh and published by World Scientific. This book was released on 1996-01-31 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: After an introductory chapter concerned with the history of force-free magnetic fields, and the relation of such fields to hydrodynamics and astrophysics, the book examines the limits imposed by the virial theorem for finite force-free configurations. Various techniques are then used to find solutions to the field equations. The fact that the field lines corresponding to these solutions have the common feature of being “twisted”, and may be knotted, motivates a discussion of field line topology and the concept of helicity. The topics of field topology, helicity, and magnetic energy in multiply connected domains make the book of interest to a rather wide audience. Applications to solar prominence models, type-II superconductors, and force-reduced magnets are also discussed. The book contains many figures and a wealth of material not readily available elsewhere.
Book Synopsis Force-free Magnetic Fields, Curl Eigenfunctions, and the Sphere in Transform Space, with Applications to Fluid Dynamics and Electromagnetic Theory by : Malcolm A. MacLeod
Download or read book Force-free Magnetic Fields, Curl Eigenfunctions, and the Sphere in Transform Space, with Applications to Fluid Dynamics and Electromagnetic Theory written by Malcolm A. MacLeod and published by . This book was released on 1993 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Models of Force-free Magnetic Fields in Resistive Media by : Rolf Boström
Download or read book Models of Force-free Magnetic Fields in Resistive Media written by Rolf Boström and published by . This book was released on 1972 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Force-Free Magnetic Fields: Is There a 'Loss of Equilibrium'? by : James A. Klimchuk
Download or read book Force-Free Magnetic Fields: Is There a 'Loss of Equilibrium'? written by James A. Klimchuk and published by . This book was released on 1988 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper examines concept in solar physics that is known as loss o f equilibrium in which a sequence of force-free magnetic fields, said to represent a possible quasi-static evolution of solar magnetic fields, reaches a critical configuration beyond which no acceptable solution of the prescribed form exists. This concept is used to explain eruptive phenomena ranging from solar flares to coronal mass ejections. Certain sequences of force-free configurations are discussed that exhibit a loss of equilibrium, and it is argued that the concept is devoid of physical significance sinc each sequence is defined a way that does not represent an acceptable thought experiment. For example, the sequence may be defined in terms of a global constraint on the boundary conditions, or the evolution of the sequence may require the creation of magnetic flux that is not connected to the photosphere and is not present in the original configuration. The global constraints typically occur in using the so-called generating function method. An acceptable thought experiment is proposed to specify the field configuration in terms of photospheric boundary conditions comprising the normal component of the field and the field-line connectivity. Consider a magnetic-field sequence that, when described in terms of a generating function, exhibits a loss of equilibrium and show that, when one instead defines the sequence in terms of the corresponding boundary conditions, the sequence is well behaved. (jhd).
Book Synopsis University Physics by : Samuel J. Ling
Download or read book University Physics written by Samuel J. Ling and published by . This book was released on 2017-12-19 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt: University Physics is designed for the two- or three-semester calculus-based physics course. The text has been developed to meet the scope and sequence of most university physics courses and provides a foundation for a career in mathematics, science, or engineering. The book provides an important opportunity for students to learn the core concepts of physics and understand how those concepts apply to their lives and to the world around them. Due to the comprehensive nature of the material, we are offering the book in three volumes for flexibility and efficiency. Coverage and Scope Our University Physics textbook adheres to the scope and sequence of most two- and three-semester physics courses nationwide. We have worked to make physics interesting and accessible to students while maintaining the mathematical rigor inherent in the subject. With this objective in mind, the content of this textbook has been developed and arranged to provide a logical progression from fundamental to more advanced concepts, building upon what students have already learned and emphasizing connections between topics and between theory and applications. The goal of each section is to enable students not just to recognize concepts, but to work with them in ways that will be useful in later courses and future careers. The organization and pedagogical features were developed and vetted with feedback from science educators dedicated to the project. VOLUME II Unit 1: Thermodynamics Chapter 1: Temperature and Heat Chapter 2: The Kinetic Theory of Gases Chapter 3: The First Law of Thermodynamics Chapter 4: The Second Law of Thermodynamics Unit 2: Electricity and Magnetism Chapter 5: Electric Charges and Fields Chapter 6: Gauss's Law Chapter 7: Electric Potential Chapter 8: Capacitance Chapter 9: Current and Resistance Chapter 10: Direct-Current Circuits Chapter 11: Magnetic Forces and Fields Chapter 12: Sources of Magnetic Fields Chapter 13: Electromagnetic Induction Chapter 14: Inductance Chapter 15: Alternating-Current Circuits Chapter 16: Electromagnetic Waves
Book Synopsis Nonlinear Force-free Magnetic Fields by : Wei-Hong Yang
Download or read book Nonlinear Force-free Magnetic Fields written by Wei-Hong Yang and published by . This book was released on 1987 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Force-Free Magnetic Fields by : W. H. Yang
Download or read book Force-Free Magnetic Fields written by W. H. Yang and published by . This book was released on 1985 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem under discussion is that of calculating magnetic field configurations in which the Lorentz force j x B is everywhere zero, subject to specified boundary conditions. We choose to represent the magnetic field in terms of Clebsch variables in the form B = grad alpha x grad beta. These variables are constant on any field line so that each field line is labeled by the corresponding values of alpha and beta. When the field is described in this way, the most appropriate choice of boundary conditions is to specify the values of alpha and beta on the bounding surface. We show that such field configurations may be calculated by a 'magneto-frictional' method. We imagine that the field lines move through a stationary medium, and that each element of magnetic field is subject to a frictional force parallel to and opposing the velocity of the field line. This concept leads to an iteration procedure for modifying the variables alpha and beta, that tends asymptotically towards the force-free state. We apply the method first to a simple problem in two rectangular dimensions, and then to a problem of cylindrical symmetry that was previously discussed by Barnes and Sturrock (1972). In one important respect, our new results differ from the earlier results of Barnes and Sturrock, and we conclude that the earlier article was in error.
Book Synopsis Strong and Superstrong Pulsed Magnetic Fields Generation by : German A. Shneerson
Download or read book Strong and Superstrong Pulsed Magnetic Fields Generation written by German A. Shneerson and published by Walter de Gruyter GmbH & Co KG. This book was released on 2014-10-29 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strong pulsed magnetic fields are important for several fields in physics and engineering, such as power generation and accelerator facilities. Basic aspects of the generation of strong and superstrong pulsed magnetic fields technique are given, including the physics and hydrodynamics of the conductors interacting with the field as well as an account of the significant progress in generation of strong magnetic fields using the magnetic accumulation technique. Results of computer simulations as well as a survey of available field technology are completing the volume.
Book Synopsis Cosmical Magnetic Fields by : E. N. Parker
Download or read book Cosmical Magnetic Fields written by E. N. Parker and published by Oxford Classic Texts in the Ph. This book was released on 2019-04-15 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: This well known and widely used landmark text explores the universal spontaneous generation of magnetic fields in astronomical bodies and the agitation of the bodies by those fields. The general properties of magnetic fields, their appearance throughout the astronomical universe, and the havoc they wreak are described in simple physical terms so as to define the broad scientific problem presented by magnetic fields. Then, with the physical problems clearly in mind, the theoretical effects are demonstrated with formal mathematical illustrations from the basic electromagnetic equations. Oxford Classic Texts in the Physical Sciences From James Clerk Maxwell's towering achievement Treatise on electricity and magnetism, to today's ground-breaking research, Oxford University Press has often been regarded as the publisher of first choice for generations of scientists. The legacy of this long publishing tradition is an unrivalled catalogue of past publications, some of which have been unavailable from us for many years. By popular demand, Oxford University Press is now reissuing some of its most celebrated science classics in the Oxford Classic Texts series. The titles to be included have been selected not only for their historic significance, but also for their enduring eloquence and clarity of presentation. Individually, each book in this collection represents a milestone in the development of scientific thought and pedagogy; collectively these books amount to an unparalleled scientific library for the enjoyment of a new generation of readers.
Book Synopsis Visualising Magnetic Fields by : John Stuart Beeteson
Download or read book Visualising Magnetic Fields written by John Stuart Beeteson and published by Academic Press. This book was released on 2001 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: CD-ROM contains: Application programs with sample data files providing worked examples -- Full source code for visualisation application program.
Book Synopsis Solar Flare Magnetic Fields and Plasmas by : Yuhong Fan
Download or read book Solar Flare Magnetic Fields and Plasmas written by Yuhong Fan and published by Springer Science & Business Media. This book was released on 2012-03-28 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is devoted to the dynamics and diagnostics of solar magnetic fields and plasmas in the Sun’s atmosphere. Five broad areas of current research in Solar Physics are presented: (1) New techniques for incorporating radiation transfer effects into three-dimensional magnetohydrodynamic models of the solar interior and atmosphere, (2) The connection between observed radiation processes occurring during flares and the underlying flare energy release and transport mechanisms, (3) The global balance of forces and momenta that occur during flares, (4) The data-analysis and theoretical tools needed to understand and assimilate vector magnetogram observations and (5) Connecting flare and CME phenomena to the topological properties of the magnetic field in the Solar Atmosphere. The role of the Sun’s magnetic field is a major emphasis of this book, which was inspired by a workshop honoring Richard C. (Dick) Canfield. Dick has been making profound contributions to these areas of research over a long and productive scientific career. Many of the articles in this topical issue were first presented as talks during this workshop and represent substantial original work. The workshop was held 9 – 11 August 2010, at the Center Green campus of the National Center for Atmospheric Research (NCAR) in Boulder, Colorado. This volume is aimed at researchers and graduate students active in solar physics, solar-terrestrial physics and magneto-hydrodynamics. Previously published in Solar Physics journal, Vol. 277/1, 2012.
Book Synopsis Force-free Magnetic Field Computation by : R. E. Wellck
Download or read book Force-free Magnetic Field Computation written by R. E. Wellck and published by . This book was released on 1973 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Force-Free Magnetic Fields: The Magneto-Frictional Method by : W. H. Yang
Download or read book Force-Free Magnetic Fields: The Magneto-Frictional Method written by W. H. Yang and published by . This book was released on 1986 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem under discussion is that of calculating magnetic field configurations in which the Lorentz force jxB is everywhere zero, subject to specified boundary conditions. We choose to represent the magnetic field in terms of Clebsch variables in the form B = grad alpha x grad beta. These variables are constant on any field line so that each field line is labeled by the corresponding values of alphs and beta. When the field is described in this way, the most appropriate choice of boundary conditions is to specify the values of alpha and beta. on the bounding surface. We show that such field configurations may be calculated by a magneto-frictional method. Imagine that the field lines move through a stationary medium and that each element of magnetic field is subject to a frictional force parallel to and opposing the velocity of the field line. This concept leads to an iteration procedure for modifying the variables alpha and beta that tends asymptotically toward the force free state. Apply the method first to a simple problem in two rectangular dimensions and then to a problem of cylindrical symmetry. In one important respect, the new results differ from the earlier results. It is concluded that the earlier article was in error. Keywords: Hydromagnetics; Reprints.
Book Synopsis New Millennium Solar Physics by : Markus J. Aschwanden
Download or read book New Millennium Solar Physics written by Markus J. Aschwanden and published by Springer. This book was released on 2019-05-22 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a follow-on book to the introductory textbook "Physics of the Solar Corona" previously published in 2004 by the same author, which provided a systematic introduction and covered mostly scientific results from the pre-2000 era. Using a similar structure as the previous book the second volume provides a seamless continuation of numerous novel research results in solar physics that emerged in the new millennium (after 2000) from the new solar missions of RHESSI, STEREO, Hinode, CORONAS, and the Solar Dynamics Observatory (SDO) during the era of 2000-2018. The new solar space missions are characterized by unprecedented high-resolution imaging, time resolution, spectral capabilities, stereoscopy and tomography, which reveal the intricate dynamics of magneto-hydrodynamic processes in the solar corona down to scales of 100 km. The enormous amount of data streaming down from SDO in Terabytes per day requires advanced automated data processing methods. The book focuses exclusively on new research results after 2000, which are reviewed in a comprehensive manner, documented by over 3600 literature references, covering theory, observations, and numerical modeling of basic physical processes that are observed in high-temperature plasmas of the Sun and other astrophysical objects, such as plasma instabilities, coronal heating, magnetic reconnection processes, coronal mass ejections, plasma waves and oscillations, or particle acceleration.
Book Synopsis Megagauss Magnetic Field Generation, Its Application to Science and Ultra-high Pulsed-power Technology by : Hans J. Schneider-Muntau
Download or read book Megagauss Magnetic Field Generation, Its Application to Science and Ultra-high Pulsed-power Technology written by Hans J. Schneider-Muntau and published by World Scientific. This book was released on 2004 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Megagauss VIII was held in connection with the conference "Physical Phenomena at High Magnetic Fields - III" (PPHMF-III) in order to encourage and facilitate cross-links between the two scientific communities"--p. xiii.
Book Synopsis Theory of One-Dimensional Vlasov-Maxwell Equilibria by : Oliver Allanson
Download or read book Theory of One-Dimensional Vlasov-Maxwell Equilibria written by Oliver Allanson and published by Springer. This book was released on 2018-08-10 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes and contextualises collisionless plasma theory, and in particular collisionless plasma equilibria. The Vlasov–Maxwell theory of collisionless plasmas is an increasingly important tool for modern plasma physics research: our ability to sustain plasma in a steady-state, and to mitigate instabilities, determines the success of thermonuclear fusion power plants on Earth; and our understanding of plasma aids in the prediction and mitigation of Space Weather effects on terrestrial environments and satellites. Further afield, magnetic reconnection is a ubiquitous energy release mechanism throughout the Universe, and modern satellites are now able to make in-situ measurements with kinetic scale resolution. To keep pace with these challenges and technological developments, a modern scientific discussion of plasma physics must enhance, and exploit, its ‘literacy’ in kinetic theory. For example, accurate analytical calculations and computer simulations of kinetic instabilities are predicated on a knowledge of Vlasov–Maxwell equilibria as an initial condition. This book highlights new fundamental work on Vlasov–Maxwell equilibria, of potential interest to mathematicians and physicists alike. Possible applications involve two of the most significant magnetic structures known to confine plasma and store energy: current sheets and flux tubes.
