Download or read book Active Control of Magneto hydrodynamic Instabilities in Hot Plasmas written by Valentin Igochine and published by Springer. This book was released on 2014-09-15 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past century, world-wide energy consumption has risen dramatically, which leads to a quest for new energy sources. Fusion of hydrogen atoms in hot plasmas is an attractive approach to solve the energy problem, with abundant fuel, inherent safety and no long-lived radioactivity. However, one of the limits on plasma performance is due to the various classes of magneto-hydrodynamic instabilities that may occur. The physics and control of these instabilities in modern magnetic confinement fusion devices is the subject of this book. Written by foremost experts, the contributions will provide valuable reference and up-to-date research reviews for "old hands" and newcomers alike.

Download or read book Magnetohydrodynamic Instabilities in a Weakly Ionized Radiating Plasma written by Merritt Louis Hougen and published by . This book was released on 1969 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Feasibility and Operational Limits for a 236 GHz Hollow Cavity Gyrotron for DEMO written by Kalaria, Parth Chandulal and published by KIT Scientific Publishing. This book was released on 2017-11-08 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: The DEMOnstration fusion power plant (DEMO) will be the first fusion reactor, which is intended to generate net electrical power. For successful operation of DEMO, high-power gyrotrons with operating frequencies up to 240 GHz are required for plasma heating and stabilization. In this work, a systematic feasibility study and tolerance analysis are performed for the conventional-type hollow-cavity DEMO gyrotrons. The various approaches are also suggested to identify its operational limits.

Download or read book Magnetohydrodynamic Stability of Tokamaks written by Hartmut Zohm and published by John Wiley & Sons. This book was released on 2015-02-09 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book bridges the gap between general plasma physics lectures and the real world problems in MHD stability. In order to support the understanding of concepts and their implication, it refers to real world problems such as toroidal mode coupling or nonlinear evolution in a conceptual and phenomenological approach. Detailed mathematical treatment will involve classical linear stability analysis and an outline of more recent concepts such as the ballooning formalism. The book is based on lectures that the author has given to Master and PhD students in Fusion Plasma Physics. Due its strong link to experimental results in MHD instabilities, the book is also of use to senior researchers in the field, i.e. experimental physicists and engineers in fusion reactor science. The volume is organized in three parts. It starts with an introduction to the MHD equations, a section on toroidal equilibrium (tokamak and stellarator), and on linear stability analysis. Starting from there, the ideal MHD stability of the tokamak configuration will be treated in the second part which is subdivided into current driven and pressure driven MHD. This includes many examples with reference to experimental results for important MHD instabilities such as kinks and their transformation to RWMs, infernal modes, peeling modes, ballooning modes and their relation to ELMs. Finally the coverage is completed by a chapter on resistive stability explaining reconnection and island formation. Again, examples from recent tokamak MHD such as sawteeth, CTMs, NTMs and their relation to disruptions are extensively discussed.

Download or read book Nonideal Magnetohydrodynamic Instabilities and Toroidal Magnetic Confinement written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The marked divergence of experimentally observed plasma instability phenomena from the predictions of ideal magnetohydrodynamics led in the early 1960s to the formulations of finite-resistivity stability theory. Beginning in the 1970s, advanced plasma diagnostics have served to establish a detailed correspondence between the predictions of the finite-resistivity theory and experimental plasma behavior - particularly in the case of the resistive kink mode and the tokamak plasma. Nonlinear resistive-kink phenomena have been found to govern the transport of magnetic flux and plasma energy in the reversed-field pinch. The other predicted finite-resistivity instability modes have been more difficult to identify directly and their implications for toroidal magnetic confinement are still unresolved.

Download or read book Shaping Effects on Magnetohydrodynamic Instabilities in a Tokamak Plasma Surrounded by a Resistive Wall written by Dov Joseph Rhodes and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The optimal plasma shape, associated with the highest beta-limit achievable with plasma rotation, is shown to be at the crossing point between the two domains. This discovery provides a basis for understanding existing experimental results and lays the groundwork for more quantitative studies with larger codes.

Download or read book Local Magnetohydrodynamic Instabilities in a Collisionless Plasma with Anisotropic Pressure written by Kjell F. Vøyenli and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The local magnetohydrodynamic stability of static equilibrium states in a collisionless plasma in a magnetic field with anisotropic pressure is discussed by using an energy principle. The discussion is mainly limited to one class of static equilibrium states. In this class the difference between the components of the pressure perpendicular and parallel to the magnetic field is proportional, along each field line, to the square of the magnetic field strength. For each equilibrium state in this class it is possible to define an associated equilibrium state with isotropic pressure, in terms of which the possible equilibrium states can be complete discussed. It is also shown that the stability of any anisotropic equilibrium state can conveniently be discussed in terms of the stability of its associated isotropic state. Complete conditions for stability are found for the uniform equilibrium state. The additional complications that are introduced by nonuniformity of the equilibrium state can be completely understood from the associated isotropic state. Certain comparison theorems for nonuniform equilibrium states are found and, finally, a class of nonuniform equilibrium states with straight field lines is discussed, for which it is shown that stability conditions are the same as in the uniform case. (Author).

Download or read book Magnetohydrodynamics of Plasma Relaxation written by S. Ortolani and published by World Scientific. This book was released on 1993 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a concise description of the phenomenon of plasma relaxation from the point of view of resistive magnetohydrodynamic (MHD) theory. Magnetized plasmas relax when they seek their natural state of lowest energy subject to certain topological constraints imposed by the magnetic field. Relaxation may be fast and dynamic or slow and gradual depending on the external environment in which the magnetoplasma system evolves. Relaxation occurs throughout the universe and may describe such diverse phenomena as dynamos, solar flares, and the operation of magnetic fusion energy experiments. This book concentrates on the dynamic, rather than variational aspects of relaxation. While the processes described are general, the book focuses on the reversed-field pinch experiment as a paradigm for plasma relaxation and dynamo action. Examples from other branches of plasma physics are also discussed. The authors draw upon their extensive experience in numerical and experimental studies of relaxation.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Principles of Magnetohydrodynamics written by J. P. Goedbloed and published by Cambridge University Press. This book was released on 2004-08-05 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a modern and accessible introduction to magnetohydrodynamics (MHD). It describes the two main applications of plasma physics, laboratory research on thermo-nuclear fusion energy and plasma astrophysics of the solar system, stars and accretion disks, from the single viewpoint of MHD. This approach provides effective methods and insights for the interpretation of plasma phenomena on virtually all scales, from the laboratory to the universe. It equips the reader with the necessary tools to understand the complexities of plasma dynamics in extended magnetic structures. The classical MHD model is developed in detail without omitting steps in the derivations and problems are included at the end of each chapter. This text is ideal for senior-level undergraduate and graduate courses in plasma physics and astrophysics.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1966 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fusion Energy Update written by and published by . This book was released on 1982 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Control of Tokamak Plasmas written by Marco Ariola and published by Springer. This book was released on 2009-08-29 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: this part is supported by two useful appendices on some of the mathematical tools used and the physical units of plasma physics. State-space models, state observers, H control, and process simulations are some of the familiar techniques used by ? the authors to meet the demanding spatial control specifications for these processes; however, the research reported in the monograph is more that just simulation studies and proposals for possible future hypothetical controllers, for the authors have worked with some of the world’s leading existing tokamak facilities. Chapter 5, 8, and 9 respectively, give practical results of implementations of their control schemes on the FTU Tokamak (Italy), the TCV Tokamak (Switzerland), and the JET Tokamak (United Kingdom). Additionally, the authors present simulation results of their ideas for the control of the new tokamak proposed for the ITER project. In conclusion, being very aware that most control engineers will not be conversant with the complexities of tokamak nuclear fusion reactor control, the authors have taken special care to give a useful introduction to the background of nuclear fusion, the science of plasma physics and appropriate models in the first part of the monograph (Chapters 1 to 3). This introduction is followed by six chapters (4 to 9) of control studies. In Chapter 4, the generic control problem is established and then five case study chapters follow.

Download or read book Investigations on Plasma Instabilities and on Mhd Applications written by Ferdinand Cap and published by . This book was released on 1969 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes theoretical investigations on plasma instabilities appearing in dynamic equilibrium configurations of thermonuclear power and propulsion devices. Zeroth order diffusion velocities due to the geometry of the confining magnetic field and due to the transport properties of the plasma variable in space and time, and the finiteness of these devices introduces new types of instabilities of nonlinear nature. Therefore the nonlinear development of nonperiodic large amplitude disturbances of the field quantities has been investigated for nearly collisionless, collision dominated and magnetohydrodynamic plasmas. The report gives summaries on Helmholtz instabilities, on instabilities in dissipative plasmas, on applying Lyapunov's theory to stability problems in plasma physics, on drift waves, and on micro-instabilities in arbitrary geometrical configurations. Furthermore summaries on the local efficiency of MHD generators and on similarity transformations in magnetogasdynamics are given. (Author).

Download or read book Magnetohydrodynamic Waves and Instabilities in Rotating Tokamak Plasmas written by Johannes Wilhelmus Haverkort and published by . This book was released on 2013 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Perturbing Macroscopic Magnetohydrodynamic Stability for Toroidal Plasmas written by Kathryn J. Comer and published by . This book was released on 2004 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Topics in Magnetohydrodynamic Topology Reconnection and Stability Theory written by David MacTaggart and published by Springer. This book was released on 2020-08-14 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents an advanced but accessible overview of some of the most important sub-branches of magnetohydrodynamics (MHD): stability theory, magnetic topology, relaxation theory and magnetic reconnection. Although each of these subjects is often treated separately, in practical MHD applications they are normally inseparable. MHD is a highly active field of research.The book is written for advanced undergraduates, postgraduates and researchers working on MHD-related research in plasma physics and fluid dynamics.