da Silva, DanielElkington, S. R.Li, X.Hudson, M. K.2024-11-142024-11-142024-05-29Silva, 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.https://doi.org/10.3389/fspas.2024.1373019http://hdl.handle.net/11603/36977Adiabatic 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.11 pagesen-USThis 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.Public Domainhttps://creativecommons.org/publicdomain/mark/1.0/Adiabatic invariantsAdiabatic motionmagnetospheric currentsRadiation BeltsRing currentText