Quantifying adiabatic motion in the outer radiation belt and ring current with invariant matching

dc.contributor.authorda Silva, Daniel
dc.contributor.authorElkington, S. R.
dc.contributor.authorLi, X.
dc.contributor.authorHudson, M. K.
dc.date.accessioned2024-11-14T15:18:58Z
dc.date.available2024-11-14T15:18:58Z
dc.date.issued2024-05-29
dc.description.abstractAdiabatic motion is a fundamental reversible process for geomagnetically trapped particle populations, including particles comprising the ring current and radiation belts. During adiabatic motion, a particle’s trajectory in configuration space responds to sufficiently slow changes in the magnetospheric magnetic field. Previous research has highlighted expected patterns in adiabatic motion, such as radial motion or the Dst effect. In this work, we introduce a method we call Invariant Matching for quantifying adiabatic motion between a pair of magnetospheres. This method can be applied to both simulation and semi-empirical magnetic field models, is computationally efficient, and in particular does not require tracing the particle trajectories. In this work, we use the Tsyganenko et al., Journal of Geophysical Research: Space Physics, 2005, 110 (TS05) magnetic field model, and present adiabatic motion between a storm commencement, the time of the storm’s Dst minimum, and a nominal recovery time. We also analyze adiabatic motion which occurs in response to enhancements of individual major current systems (including the ring current, Chapman-Ferraro current, Birkeland current, and tail current). Our methodology yields vector fields quantifying the displacement of mirror points throughout the magnetosphere, prepared in a way appropriate for application to both outer radiation belt and ring current populations.
dc.description.sponsorshipThe author(s) declare that financial support was received for the research, authorship, and/or publication of this article. NASA FINESST Grant.
dc.description.urihttps://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2024.1373019/full
dc.format.extent11 pages
dc.genrejournal articles
dc.identifierdoi:10.13016/m2fmpe-n0ds
dc.identifier.citationSilva, D. E. da, S. R. Elkington, X. Li, and M. K. Hudson. “Quantifying Adiabatic Motion in the Outer Radiation Belt and Ring Current with Invariant Matching.” Frontiers in Astronomy and Space Sciences 11 (May 30, 2024). https://doi.org/10.3389/fspas.2024.1373019.
dc.identifier.urihttps://doi.org/10.3389/fspas.2024.1373019
dc.identifier.urihttp://hdl.handle.net/11603/36977
dc.language.isoen_US
dc.publisherfrontiers
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Goddard Planetary Heliophysics Institute (GPHI)
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.subjectAdiabatic invariants
dc.subjectAdiabatic motion
dc.subjectmagnetospheric currents
dc.subjectRadiation Belts
dc.subjectRing current
dc.titleQuantifying adiabatic motion in the outer radiation belt and ring current with invariant matching
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0001-7537-3539

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