Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"magnetospheres"”.
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Simulations of Dynamic Relativistic Magnetospheres
… and black holes are generally surrounded by magnetospheres of highly conducting plasma in which the magnetic flux density is so high that hydrodynamic forces are irrelevant. In this vanishing-inertia---or ultra-relativistic---limit, magnetohydrodynamics becomes force-free electrodynamics, a …
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The magnetospheres of accreting neutron stars
… the boundary shape resembles that of static magnetospheres. Plasma entry when the boundary is Rayleigh-Taylor stable is examined, and, under conditions typical of bright binary X-ray sources, cusp losses and diffusion across stellar magnetic field lines are eliminated as likely ways that most …
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Magnetospheres of neutron stars accreting from disks
This thesis presents quantitative models of the magnetosphere of a magnetic star surrounded by a thin plasma disk. The model is motivated by the currently accepted picture of many accretion-powered pulsars as strongly magnetic neutron stars accreting from disks. It may also be relevant to the …
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Motion of charged particles in pulsar magnetospheres
The motion of charges in the magnetosphere of pulsars is studied from two complementary points of view: (i) For the case of aligned magnetic and rotational axes we solve a fluid version of the Lorentz-Dirac equation, in the Landau approximation, for a two-component plasma. We start from an …
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Polarized Radiative Transfer in the Magnetospheres and Atmospheres of Neutron Stars
… high-energy photons propagating in neutron star magnetospheres can be attenuated by QED processes like photon splitting and magnetic pair creation. In this thesis, I explore the scattering transport in the classical magnetic Thomson domain using Monte Carlo technique. Representative results for …
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A Method to Compute Three Dimensional Magnetospheric Equilibria with Dipole Tilt and its Application in Estimating Magnetic Flux Tube Volume
… has been tested against various equilibrated magnetospheres generated by the new friction code. Although still incomplete, the method exhibits promising features, and is to be completed in the future.
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Multifractal Analysis of Geomagnetically Induced Currents using Wavelet Leaders
… interacts with Earth’s magnetosphere and the magnetospheres of other planets. Occasionally large amounts of magnetized plasma are released at one time in a Corona mass ejection (CME). When the CME interacts with Earth’s magnetic field, it induces perturbations that may have a significant …
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Electromagnetic extraction and annihilation of antiprotons for spacecraft propulsion
… long-term trapping of antiprotons from planetary magnetospheres is developed. The excitation via rotating magnetic field of an electron population within a distributed neutral plasma is shown to produce a large-scale magnetic field approximating a dipole with r-² or slower decay. These shallow …
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Density profiles of plasmas confined by the field of a Levitating Dipole Magnet
… partly on observations of planetary magnetospheres-suggest that dipole-confined plasmas will be driven by fluctuations into pressure and density profiles that are "stationary" to MHD interchange modes. The stationary pressure profile is characterized by an equal amount of entropy per …
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Electron equations of state during magnetic reconnection
… in the solar corona and wind, and in planetary magnetospheres. Disruptive reconnection in laboratory fusion experiments rapidly deconfines the plasma. While reconnection alters the global magnetic field and plasma properties, it depends on small-scale local electron dynamics. Particularly in …
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Theoretical studies of the pulsar magnetosphere
… favors states with extended. dynamically active magnetospheres with a high degrees of corotation. By calculating total power input to the magnetosphere via collisions in the stellar crust. and the total power radiated due to azimuthal drift motion. it is determined that the minimum energy states …
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Radiatively Cooled Magnetic Reconnection Experiments Driven by Pulsed Power
… such as black hole coronae and neutron star magnetospheres, radiative cooling modifies the energy partition by rapidly removing internal energy. In this thesis, we perform experimental and computational studies of magnetic reconnection in a radiatively cooled regime, previously unexplored in …
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Synthesis Imaging with Vector Sensor Arrays
… of solar wind and coronal mass ejections on the magnetospheres of solar system planets. Despite their value, few measurements in the sub-10 MHz band have been made because of the technical challenges in conducting these observations. Parabolic antennas, which are commonly used for radio …