Matches in SemOpenAlex for { <https://semopenalex.org/work/W4322009941> ?p ?o ?g. }
Showing items 1 to 54 of
54
with 100 items per page.
- W4322009941 abstract "There is a growing body of observational, theoretical and experimental evidence to indicate that a proper description of radiation belt charged particle transport will require new mathematical models, i.e. new partial differential equations. One leading candidate is to extend the ‘standard diffusion equation’ to a more general Fokker-Planck equation in order to include advection coefficients. Ideally, these advection (first-order transport) coefficients should be parameterized by plasma and VLF/ELF electromagnetic wave parameters in a similar manner to that used for the diffusion coefficients. To the authors' knowledge, this goal has not yet been achieved - at least not to obtain an equation that can be/has been implemented into operational global scale numerical models.In general, advection coefficients are in fact a combination of both ‘drift coefficients’ and derivatives of the diffusion coefficients. In the standard quasilinear formalism, this combination produces advection coefficients that are identically zero because of specific constraints imposed via the Hamiltonian structure, with a derivation often attributed to Landau/Lichtenberg & Lieberman [1].In this paper [2] we present a new theory that incorporates and builds upon the ‘weak turbulence/quasilinear results’ of [3,4] and demonstrates the breaking of the ‘Landau-Lichtenberg-Liebermann condition’ for the case of high wave amplitudes, or equivalently small timescales.We therefore obtain:(i) the standard quasilinear results for small wave amplitudes and long timescales;(ii) and non-zero advection coefficients - as well as diffusion coefficients - that are valid for short timescales (high wave amplitudes).These limiting timescales are determined by the electromagnetic wave amplitude. This also demonstrates that one can use what may be considered ‘quasilinear methods’ to obtain interesting new results for ‘nonlinear/high-amplitude’ waves in radiation belt modelling. We verify the results using high-performance test-particle experiments.References[1] A.J. Lichtenberg, and M.A. Lieberman, “Regular and Chaotic Dynamics”, 2nd Ed., Springer, 1991[2] O. Allanson et al (in prep)[3] D.S. Lemons, PoP, 19, 012306, 2012[4] O. Allanson, T. Elsden, C. Watt, and T. Neukirch, Frontiers Aston. Space Sci., 8:805699, 2022" @default.
- W4322009941 created "2023-02-26" @default.
- W4322009941 creator A5011734134 @default.
- W4322009941 creator A5018109995 @default.
- W4322009941 creator A5025405775 @default.
- W4322009941 creator A5067907125 @default.
- W4322009941 creator A5087195287 @default.
- W4322009941 date "2023-05-15" @default.
- W4322009941 modified "2023-09-29" @default.
- W4322009941 title "Radiation belt particle diffusion, drift and advection via cyclotron interactions" @default.
- W4322009941 doi "https://doi.org/10.5194/egusphere-egu23-8925" @default.
- W4322009941 hasPublicationYear "2023" @default.
- W4322009941 type Work @default.
- W4322009941 citedByCount "0" @default.
- W4322009941 crossrefType "posted-content" @default.
- W4322009941 hasAuthorship W4322009941A5011734134 @default.
- W4322009941 hasAuthorship W4322009941A5018109995 @default.
- W4322009941 hasAuthorship W4322009941A5025405775 @default.
- W4322009941 hasAuthorship W4322009941A5067907125 @default.
- W4322009941 hasAuthorship W4322009941A5087195287 @default.
- W4322009941 hasConcept C121332964 @default.
- W4322009941 hasConcept C126255220 @default.
- W4322009941 hasConcept C130787639 @default.
- W4322009941 hasConcept C180205008 @default.
- W4322009941 hasConcept C3079626 @default.
- W4322009941 hasConcept C33923547 @default.
- W4322009941 hasConcept C5072599 @default.
- W4322009941 hasConcept C62520636 @default.
- W4322009941 hasConcept C69357855 @default.
- W4322009941 hasConceptScore W4322009941C121332964 @default.
- W4322009941 hasConceptScore W4322009941C126255220 @default.
- W4322009941 hasConceptScore W4322009941C130787639 @default.
- W4322009941 hasConceptScore W4322009941C180205008 @default.
- W4322009941 hasConceptScore W4322009941C3079626 @default.
- W4322009941 hasConceptScore W4322009941C33923547 @default.
- W4322009941 hasConceptScore W4322009941C5072599 @default.
- W4322009941 hasConceptScore W4322009941C62520636 @default.
- W4322009941 hasConceptScore W4322009941C69357855 @default.
- W4322009941 hasLocation W43220099411 @default.
- W4322009941 hasOpenAccess W4322009941 @default.
- W4322009941 hasPrimaryLocation W43220099411 @default.
- W4322009941 hasRelatedWork W1978377870 @default.
- W4322009941 hasRelatedWork W1986572596 @default.
- W4322009941 hasRelatedWork W2014831375 @default.
- W4322009941 hasRelatedWork W2033303521 @default.
- W4322009941 hasRelatedWork W2043620197 @default.
- W4322009941 hasRelatedWork W2055968481 @default.
- W4322009941 hasRelatedWork W2060888287 @default.
- W4322009941 hasRelatedWork W2069184612 @default.
- W4322009941 hasRelatedWork W3104925183 @default.
- W4322009941 hasRelatedWork W3106397438 @default.
- W4322009941 isParatext "false" @default.
- W4322009941 isRetracted "false" @default.
- W4322009941 workType "article" @default.