Multiscale Stochastic Simulations of Radiation Belt Dynamics

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dc.contributor.advisorChan, Anthony Aen_US
dc.creatorAldhurais, Suhail Adelen_US
dc.date.accessioned2024-05-21T21:32:06Zen_US
dc.date.available2024-05-21T21:32:06Zen_US
dc.date.created2024-05en_US
dc.date.issued2024-04-05en_US
dc.date.submittedMay 2024en_US
dc.date.updated2024-05-21T21:32:06Zen_US
dc.description.abstractA quantitative evaluation of the main physical processes in Earth's radiation belts has been difficult because of the broad-spectrum of timescales of the physical processes (milliseconds to several minutes). This thesis presents the K2 model, which incorporates a wide spectrum of timescales by combining Stochastic Differential Equation (SDE) methods into an otherwise Magnetohydrodynamics (MHD)-particle framework. We present the simulation results of March 17, 2013 event and show the capabilities of the K2 model. Additionally, an important spacecraft under-sampling of the simulation results is observed using NASA Van Allen Probes spacecraft orbits. A separate guiding-center code is constructed to investigate the quasilinear diffusion limit of the radial transport produced by ultra low-frequency waves contained in the MHD fields. We show that given sufficient phase randomization, the particle motion is diffusive. It is observed numerically that the addition of the electric and electromagnetic diffusion coefficients is equal to the combined diffusion coefficient.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationAldhurais, Suhail. Multiscale Stochastic Simulations of Radiation Belt Dynamics. (2024). Masters thesis, Rice University. https://hdl.handle.net/1911/116117en_US
dc.identifier.urihttps://hdl.handle.net/1911/116117en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectEarth's radiation beltsen_US
dc.subjectadiabatic invarianten_US
dc.subjectwave-particle interactionen_US
dc.subjectenergetic particlesen_US
dc.subjectnumerical simulationen_US
dc.subjectmagnetospheric plasma wavesen_US
dc.titleMultiscale Stochastic Simulations of Radiation Belt Dynamicsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentApplied Physicsen_US
thesis.degree.disciplineApplied Physicsen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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