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dc.contributor.advisor Dessler, Alexander J.
dc.creatorYang, Yong-Shiang
dc.date.accessioned 2009-06-04T00:11:29Z
dc.date.available 2009-06-04T00:11:29Z
dc.date.issued 1992
dc.identifier.citation Yang, Yong-Shiang. "Numerical simulation of the Jovian torus-driven plasma transport." (1992) Diss., Rice University. https://hdl.handle.net/1911/16593.
dc.identifier.urihttps://hdl.handle.net/1911/16593
dc.description.abstract The Rice Convection Model has been modified and applied to the study of the Jovian magnetospheric system, which is interchange unstable. The basic interchange instability of the Io plasma torus is opposed by pressure gradients in the energetic particles outside the torus. Many simulations have been performed for cases where the overall system is inter-change unstable under the ideal-MHD assumption E + v $\times$ B = 0. For such cases, the torus breaks up predominantly into long fingers unless the initial condition strongly favors some other mode. The ends of the fingers tend to be rounded, and they are connected to the main torus by tails that thin rapidly with time if the torus runs out of plasma. Our calculations place an upper limit of $\sim$1R$\sb{\rm J}$ on the average distance between fingers. For an initially asymmetric large-scale torus, fingers generally form on a time scale shorter than the one on which the heavy side of the torus falls outwards. However, the fingers form predominantly on the heavy side. Galileo may observe such finger features outside the Io torus, at L $\approx$ 7 to 15._x000D_ Additionally, in this thesis, drift-wave theory has been used to investigate the effect of energetic (KeV or MeV) particles on the Io torus plasma transport. It is shown that the MHD stability criterion, where the interchange motion would be completely stabilized if the energy density of the hot stabilizing plasma is greater than or dual to 3/4 of that of the cold unstable plasma, no longer holds owing to the gradient/curvature drift of the energetic particles. This differential-drift effect, which is a departure from the ideal-MHD and frozen-in flux, may play a significant role in plasma transport in the Jovian magnetosphere.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectPlasma physics
Astronomy
Astrophysics
Geophysics
dc.title Numerical simulation of the Jovian torus-driven plasma transport
dc.type Thesis
dc.type.material Text
thesis.degree.department Space Physics and Astronomy
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.format.digitalOrigin 288 p.


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