Global ETD Search
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Showing 1 to 20 of 154 for “"Reconnection"”.
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Generalised mathematical models for 3D magnetic reconnection at null points: magnetic reconnection at null points
… occurs-facilitated by the process of `magnetic reconnection'. A great deal of research has been focussed on understanding the reconnection process and we now appreciate that the 3D process is critically di erent from early 2D models. The magnetic field in many astrophysical plasmas, for example …
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Understanding Vortex Reconnection in Complex Fluid Flows
Reconnection of wingtip vortices behind aircrafts is thought to be a cause of wake turbulence, detrimental to air traffic control. We observe the reconnection process for three initial vortex tube set-ups; anti-parallel, orthogonal and anti-parallel with axial flow. From these we are able to …
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Electron equations of state during magnetic reconnection
Magnetic reconnection is a rapid reconfiguration of the magnetic field lines in a plasma that converts stored magnetic energy into particle energy in a wide range of environments. It is a source of energetic particles in the solar corona and wind, and in planetary magnetospheres. Disruptive …
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Coronal magnetic energy release by current sheet reconnection
… understanding the solar flare in which magnetic reconnection is thought to play a key role. A review of existing reconnection solutions is given in Chapters 2 and 3, with new analytic and numeric results are presented in subsequent chapters. Although much of the work in this thesis is …
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Experimental studies of magnetic reconnection in 3D geometries
Magnetic reconnection is an important and prevalent plasma physics phenomenon occurring in astrophysical (solar flares), space (magnetospheric substorms), and laboratory settings (tokamak sawtooth oscillations). It allows for a change in the magnetic field topology in plasmas while also …
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Catastrophe Model for the Onset of Fast Magnetic Reconnection
… devices are explosive events in which magnetic reconnection facilitates the rapid release of energy stored in stressed magnetic fields into the surrounding plasma. Much effort has gone into understanding how the energy is released so fast. Collisional (Sweet-Parker) reconnection, based on …
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Recreating Parks as Places for Restoration, Reconnection, and Reconciliation
This integrative research study builds on the emerging theme of valuing parks for providing health benefits through experiences in nature, and explores how transdisciplinary inquiry can inform the role parks play connecting people to nature in the face of current global environmental challenges. …
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Crafting a Place of Transition: From Refuge to Reconnection
The feelings evoked by sterile, socially isolating clinical settings are counterproductive in biopsychosocial healthcare environments such as addiction treatment, where the survival of the individual depends not only on the treatment of their medical needs, but also on helping them rebuild their …
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Experimental investigation of the trigger problem in magnetic reconnection
Magnetic reconnection is a fundamental process in plasma physics, which involves the often explosive release of magnetically stored energy in both space and laboratory plasmas. In order for this sudden release of energy to occur, there must be a period of slow reconnection, in which magnetic stress …
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Radiatively Cooled Magnetic Reconnection Experiments Driven by Pulsed Power
Magnetic reconnection is a ubiquitous process in astrophysical plasmas, responsible for the explosive conversion of magnetic energy into thermal and kinetic energy. In extreme astrophysical systems, such as black hole coronae and neutron star magnetospheres, radiative cooling modifies the energy …
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Experimental study of current-driven turbulence during magnetic reconnection
Magnetic reconnection is an important process in magnetized plasmas ranging from the laboratory to astrophysical scales. It enables the release of magnetic energy believed to power solar flares and magnetospheric substorms. Reconnection also controls the evolution of the topology of the magnetic …
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An analysis of reconnection dynamics in an eruptive flare model
… by B. V. Somov & V. S. Titov for Petschek-type reconnection. The first part of this dissertation provides a detailed analysis of the Somov-Titov model, its assumptions, strengths and weaknesses. We consider the role of both the diffusion region and nonuniform resistivity in the generation of …
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Magnetic reconnection in small and large scales on the sun
… of magnetic fields, the so-called magnetic reconnection in solar physics. They are occurring at different scales related to various phenomena, during minimum or maximum of the solar cycle, from the photosphere to the solar corona. For small-scale activities, type II spicules which display …
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Magnetic reconnection physics in the solar wind with Voyager 2
Magnetic reconnection is the process by which the magnetic topology evolves in collisionless plasmas. This phenomenon is fundamental to a broad range of astrophysical processes such as stellar flares, magnetospheric substorms, and plasma accretion, yet it is poorly understood and difficult to …
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A Study of Reconnection Poleward of the Cusp: Cluster and Polar
… region (IDR) in symmetric, collisionless reconnection. These features have been shown by numerical simulations under moderate density asymmetries (~10), and theoretical analyses. However, very few studies have addressed these issues with in-situ observations, particularly at high magnetic …
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Modeling the formation of current sheets in symmetric and asymmetric reconnection
… thesis we investigate the nature of magnetic reconnection using analytic and numerical methods. We consider configurations which are symmetric across the reconnection layer relevant to the Earth magnetotail, as well as configurations asymmetric in density and temperature across the …
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Identifying Signatures of Plasma Waves and Reconnection Associated with Kelvin-Helmholtz Activity
… not entirely clear. Recent work has shown that reconnection in Kelvin-Helmholtz vortices can transport plasma into the magnetosphere. Previous studies have also shown that mode conversion at the magnetopause can generate kinetic Alfvén wave (KAW) activity. Both magnetic reconnection and plasma …
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