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Showing 1 to 20 of 60 for “"magnetic reconnection"”.
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Generalised mathematical models for 3D magnetic reconnection at null points: magnetic reconnection at null points
… plasma can store large amounts of energy in the magnetic field. This energy is released when a sudden change in the magnetic topology of the field occurs-facilitated by the process of `magnetic reconnection'. A great deal of research has been focussed on understanding the reconnection process and …
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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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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
Solar flares, magnetic substorms and sawtooth crashes in fusion 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 …
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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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Magnetic reconnection in small and large scales on the sun
… activities observed are related to the solar magnetic field, especially the topological restructuring 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, …
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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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Energy partition in magnetic reconnection and kinetic turbulence in weakly collisional plasmas
… studies detailing the dissipation of energy in magnetic reconnection and decaying turbulence in weakly collisional plasmas. One of the open questions regarding magnetic reconnection is how magnetic energy is dissipated into particle heating, kinetic energy, and supra-thermal particle …
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Measurement of radio-frequency magnetic fluctuations in the VTF magnetic reconnection experiment
… fabricated, and calibrated, a radio-frequency magnetic probe, subsequently used to measure magnetic turbulance in the reconnecting plasmas of the Versatile Toroidal Facility (VTF). Reconnecting Hydrogen plasmas were created, and magnetic fluctuations in all three artesian directions were …
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Structure of the electron diffusion region in magnetic reconnection with small guide fields
… Earth's magnetotail and kinetic simulations of magnetic reconnection have shown high electron pressure anisotropy in the inflow of electron diffusion regions. This anisotropy has been accurately accounted for in a new fluid closure for collisionless reconnection. By tracing electron orbits in …
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A Study of Magnetic Reconnection: From 2D Energy Release to 3D Spreading and Localization
Magnetic reconnection is a plasma process in which stored magnetic energy is converted into thermal and kinetic energies of the surrounding plasma. Oppositely directed magnetic field lines break and cross connect due to a dissipative mecha- nism. The now bent, reconnected field lines retreat from …
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The influence of Hall currents, plasma viscosity and electron inertia on magnetic reconnection solutions
This thesis examines magnetic reconnection in the solar corona. Magnetic reconnection is the only mechanism which allows the magnetic topology of magnetized plasmas to be changed. Many of the dynamic processes in the Sun's atmosphere are believed to be driven by magnetic reconnection and studying …
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"Smoking-Gun" Observables of Magnetic Reconnection: Spatiotemporal Evolution of Electron Characteristics Throughout the Diffusion Region
<p>How does magnetic reconnection happen in a collisionless plasma? Knowledge of electron-scale dynamics is necessary to answer this outstanding question of plasma physics. Based on fully kinetic particle-in-cell (PIC) simulations of symmetric reconnection, the spatiotemporal evolution of velocity …
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Two-fluid simulations of magnetic reconnection with a kinetic closure for the electron pressure anisotropy
Magnetic reconnection is a rapid rearrangement of magnetic line topology in a plasma that can allow magnetic energy to heat, drive macroscopic flows, or accelerate particles in space and laboratory plasmas. Though reconnection affects global plasma dynamics, it depends intimately on small-scale …
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Magnetic reconnection in high-temperature plasmas : excitation of the drift-tearing mode and the transport of electron thermal energy
… Acrit, the jump of the first derivative of the magnetic field across the reconnection layer. Both experimental observations and theoretical considerations indicate that in the regimes of interest the values of the perpendicular thermal diffusivity D are significantly higher than the …
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Determination of the ion distribution function during magnetic reconnection in the versatile toroidal facility with a gridded energy analyzer
… of the ion distribution function during driven magnetic reconnection in the Versatile Toroidal Facility. The temporal evolution of the ion characteristic is measured at different locations throughout the reconnection region, for a number of magnetic field configurations. The measured ion …
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