Simulation of radiation belt wave-particle interactions in an MHD-particle framework

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dc.citation.articleNumber1239160en_US
dc.citation.journalTitleFrontiers in Astronomy and Space Sciencesen_US
dc.citation.volumeNumber10en_US
dc.contributor.authorChan, Anthony A.en_US
dc.contributor.authorElkington, Scot R.en_US
dc.contributor.authorLongley, William J.en_US
dc.contributor.authorAldhurais, Suhail A.en_US
dc.contributor.authorAlam, Shah S.en_US
dc.contributor.authorAlbert, Jay M.en_US
dc.contributor.authorJaynes, Allison N.en_US
dc.contributor.authorMalaspina, David M.en_US
dc.contributor.authorMa, Qianlien_US
dc.contributor.authorLi, Wenen_US
dc.date.accessioned2024-05-03T15:51:10Zen_US
dc.date.available2024-05-03T15:51:10Zen_US
dc.date.issued2023en_US
dc.description.abstractIn this paper we describe K2, a comprehensive simulation model of Earth’s radiation belts that includes a wide range of relevant physical processes. Global MHD simulations are combined with guiding-center test-particle methods to model interactions with ultra low-frequency (ULF) waves, substorm injections, convective transport, drift-shell splitting, drift-orbit bifurcations, and magnetopause shadowing, all in self-consistent MHD fields. Simulation of local acceleration and pitch-angle scattering due to cyclotron-scale interactions is incorporated by including stochastic differential equation (SDE) methods in the MHD-particle framework. The SDEs are driven by event-specific bounce-averaged energy and pitch-angle diffusion coefficients. We present simulations of electron phase-space densities during a simplified particle acceleration event based on the 17 March 2013 event observed by the Van Allen Probes, with a focus on demonstrating the capabilities of the K2 model. The relative wave-particle effects of global scale ULF waves and very-low frequency (VLF) whistler-mode chorus waves are compared, and we show that the primary acceleration appears to be from the latter. We also show that the enhancement with both ULF and VLF processes included exceeds that of VLF waves alone, indicating a synergistic combination of energization and transport processes may be important.en_US
dc.identifier.citationChan, A. A., Elkington, S. R., Longley, W. J., Aldhurais, S. A., Alam, S. S., Albert, J. M., Jaynes, A. N., Malaspina, D. M., Ma, Q., & Li, W. (2023). Simulation of radiation belt wave-particle interactions in an MHD-particle framework. Frontiers in Astronomy and Space Sciences, 10. https://doi.org/10.3389/fspas.2023.1239160en_US
dc.identifier.digitalfspas-10-1239160en_US
dc.identifier.doihttps://doi.org/10.3389/fspas.2023.1239160en_US
dc.identifier.urihttps://hdl.handle.net/1911/115551en_US
dc.language.isoengen_US
dc.publisherFrontiers Media S.A.en_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license. Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleSimulation of radiation belt wave-particle interactions in an MHD-particle frameworken_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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