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 20 of 108 for “"Magnetosphere"”.
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Density structures in the Jovian magnetosphere
… and examining density structures in Jupiter's magnetosphere. The 110 hours of data used are from a 4-second temporal resolution density data set derived from plasma wave instruments on board both Voyager 1 and Voyager 2. One hundred five structures are identified. They are believed to be the …
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Theoretical studies of the pulsar magnetosphere
Quantitative models of the plasma magnetosphere surrounding a rotating. magnetized. neutron star (pulsar) are studied in this thesis. Both the aligned model (rotation axis parallel to magnetic axis) and the nonaligned model are considered. An energy analysis is performed on two explicit models of …
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Hydromagnetic wave damping in the magnetosphere.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1974.
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Electrostatic instabilities in the outer magnetosphere.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1971.
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Conductivity Modulation of Magnetosphere-Ionosphere Coupling
… to the near-Earth space plasma region called the magnetosphere. This region is formed by interactions between the energetic particle outflow from the sun called the Solar Wind and Earth's magnetic field. Models of the coupling between these regions typically take a "sun to mud" perspective, as …
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Disk-magnetosphere interaction in X-ray binaries
Binary X-ray pulsars are strongly magnetic neutron stars accreting matter from a companion star. The strong magnetic fields of the neutron stars guide the accreting plasma to the magnetic poles, and X-ray pulsations result from the rotation of the beamed emission at the magnetic poles through the …
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Non-Linear Magnetosphere-Ionosphere Interactions at High Latitudes
… coupling between the ionosphere and magnetosphere is investigated in this dissertation. The study is based on a non-linear, 3D, reduced magnetohydrodynamic model describing interaction between dispersive Alfven waves and the nightside high-latitude ionosphere. Results are presented …
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A Dynamic Coupled Magnetosphere-Ionosphere-Ring Current Model
… thesis we describe a coupled model of Earth's magnetosphere that consists of the Lyon-Fedder-Mobarry (LFM) global magnetohydrodynamics (MHD) simulation, the MIX ionosphere solver and the Rice Convection Model (RCM). We report some results of the coupled model using idealized inputs and model …
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MODELING OF PLASMA-SHEET CONVECTION: IMPLICATIONS FOR SUBSTORMS (MAGNETOSPHERE)
… a more stretched configuration. Eventually, the magnetosphere must find some way to release plasma from inner-plasma-sheet flux tubes. This suggests an obvious role for the magnetospheric substorm in the convection process. To probe this process further, a two-dimensional, self-consistent, …
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Solar wind entry into the magnetosphere under northward IMF conditions
<p>The state of the plasma sheet in the magnetosphere is usually observed to be hot (1-10 keV) and tenuous (∼0.1 cm-3). However, sometimes part of it is observed to be colder (< 1 keV) and denser (∼1 cm-3), and the plasma flow is almost stagnant. Much higher density (∼10 cm-3) plasma …
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Solar wind-magnetosphere interactions : a statistical analysis of spacecraft measurements
When investigating solar wind-magnetosphere-ionosphere coupling, it is important to understand how the solar wind, and the interplanetary magnetic field (IMF) frozen into it, behaves as it reaches the Earth. Magnetic reconnection, for example, is a phenomenon whose morphology is governed by the IMF …
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The inner magnetosphere of Jupiter and the Io plasma torus
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.
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Solar Wind-Magnetosphere-Ionosphere Coupling: Multiscale Study with Computational Models
Solar wind-magnetosphere-ionosphere (SW-M-I) coupling is investigated with three different computational models that characterize space plasma dynamics on distinct spatial/temporal scales. These models are used to explore three important aspects of SW-M-I coupling. A particle-in-cell (PIC) model …
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The dynamics of the low energy plasma in the Jovian magnetosphere
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1980.
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Solar Wind-Magnetosphere Coupling: A Global Perspective of Reconnection in the Magnetotail
… of the observed substorm. We simulate the entire magnetosphere in maximum detail for this event using the Space Weather Modeling Framework/Block Adaptive Tree Solar-wind Roe Upwind Scheme (SWMF/BATS-R-US) model from NASA’s Community Coordinated Modeling Center (CCMC) with a special, high …
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A statistical study of plasmawaves and energetic particles in the outer magnetosphere
The Earth magnetosphere contains energetic particles undergoing specific motions around Earth's magnetic field, and interacting with a variety of waves. The dynamics of energetic particles are often described in terms of three kinds of adiabatic invariants. Energetic electrons are often unstable to …
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The Non-Linear Electrodynamic Coupling Between the Solar Wind, Magnetosphere and Ionosphere
… the ionosphere by coupling between the earth's magnetosphere and the solar wind has been shown to have a non-linear response to the interplanetary electric field (IEF). This dissertation presents an empirical study of this polar cap potential saturation phenomenon. First, the saturation of the …
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