Download Free Modeling Of Magnetic Island Formation In Magnetic Reconnection Experiment Book in PDF and EPUB Free Download. You can read online Modeling Of Magnetic Island Formation In Magnetic Reconnection Experiment and write the review.

A new experiment for studying magnetic reconnection, the process in a magnetized plasma which allows for the magnetic topology to change rapidly, has been constructed and is currently in operation. Magnetic reconnection is of great interest because while it occurs in localized regions, it influences the macroscopic behavior of many plasmas systems including space and astrophysical plasmas as well as laboratory experiments. An emerging frontier of reconnection research has been the study of collisionless magnetic reconnection in Earth's magnetosphere. Extensive studies in theory, simulation, and spacecraft observations have been successful in developing our understanding of these systems while there are few laboratory experiments capable of exploring similar parameters. The Terrestrial Reconnection Experiment (TREX) marks the first experiment dedicated to the study of these kinetic effects in low collisional plasmas. In operation at the Wisconsin Plasma Physics Laboratory (WiPPL), TREX has undergone multiple hardware upgrades in order to access new regimes of reconnection. The experiment consists of a large spherical vacuum vessel housing internal reconnection drive coils that force magnetic reconnection with a background plasma. This generates a strong toroidal current layer near the coils that is driven inward to the central axis as reconnection proceeds. An extensive suite of magnetic and electrostatic diagnostics allow for fine measurement of the local and global dynamics of the system. Two important results are reported in this thesis. The first is the direct observation of the spontaneous formation of plasmoids, or magnetic islands, which occur at the electron scale inside the ion diffusion region. The experiments show that the plasmoid instability, a fundamental ingredient in models for electron energization and increased reconnection dynamics, is active at a smaller system size than predicted by theory. The second investigation examines the dynamics of strongly driven magnetic reconnection in which a shock interface between the supersonically driven plasma inflow and a region of magnetic flux pileup develops. The observations elucidate the role of shock formation in permitting the normalized reconnection rate to self regulate to a fixed value.
In this thesis, the day side reconnection processes are studied by using computer simulations. First, the global magnetic reconnection patterns at the dayside magnetopause are studied based on a two-dimensional incompressible magnetohydrodynamic (MHD) code. It is found that multiple X line reconnection may prevail at the dayside magnetopause when the magnetic Reynolds number is large (> 200). The formation and subsequent poleward convection of magnetic islands are observed in the simulation. The Alfvén Mach number of the solar wind, MAsw, cam also change the reconnection patterns. For a large reconnection tends to occur at the higher latitude region. Secondly, the structure of the dayside reconnection layer is studied by a two-dimensional compressible MHD simulation. In a highly asymmetric configuration typical of the dayside magnetopause, the pair of slow shocks bounding the reconnection layer in Petschek's symmetric model is found to be replaced by an intermediate shock on the magnetosheath side and a weak slow shock on the magnetospheric side. In addition, a mechanism for the enhancement of By, which is observed in the magnetopause current layer and magnetic flux tubes, is proposed.
This book, first published in 2000, is a comprehensive introduction to this major topic in plasma physics; for graduates and researchers.
Visualization and analysis tools, techniques, and algorithms have undergone a rapid evolution in recent decades to accommodate explosive growth in data size and complexity and to exploit emerging multi- and many-core computational platforms. High Performance Visualization: Enabling Extreme-Scale Scientific Insight focuses on the subset of scientifi
An overview of current knowledge and future research directions in magnetospheric physics In the six decades since the term 'magnetosphere' was first introduced, much has been theorized and discovered about the magnetized space surrounding each of the bodies in our solar system. Each magnetosphere is unique yet behaves according to universal physical processes. Magnetospheres in the Solar System brings together contributions from experimentalists, theoreticians, and numerical modelers to present an overview of diverse magnetospheres, from the mini-magnetospheres of Mercury to the giant planetary magnetospheres of Jupiter and Saturn. Volume highlights include: Concise history of magnetospheres, basic principles, and equations Overview of the fundamental processes that govern magnetospheric physics Tools and techniques used to investigate magnetospheric processes Special focus on Earth’s magnetosphere and its dynamics Coverage of planetary magnetic fields and magnetospheres throughout the solar system Identification of future research directions in magnetospheric physics The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Find out more about the Space Physics and Aeronomy collection in this Q&A with the Editors in Chief
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.