Publication:
Finite difference modeling of coherent wave amplification in the Earth's radiation belts

dc.contributor.coauthorHarid, V.
dc.contributor.coauthorGolkowski, M.
dc.contributor.coauthorBell, T.
dc.contributor.coauthorLi, J. D.
dc.contributor.departmentDepartment of Electrical and Electronics Engineering
dc.contributor.kuauthorİnan, Umran Savaş
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.date.accessioned2024-11-09T12:31:54Z
dc.date.issued2014
dc.description.abstractModeling of gyroresonant wave-particle interactions in the radiation belts requires solving the Vlasov-Maxwell system of equations in an inhomogenous background geomagnetic field. Previous works have employed particle-in-cell methods or Eulerian solvers (such as the Vlasov Hybrid Simulation code) to provide numerical solutions to the problem. In this report, we provide an alternative numerical approach by utilizing a first order finite difference upwind scheme. When coupled to the narrowband Maxwell's equations, the model reproduces linear as well as nonlinear wave growth of coherent signals. Wave growth is nonlinear growth when the wave amplitude exceeds the minimum value for phase trapping of counterstreaming particles and is linear otherwise. The model also demonstrates free-running frequency variation for a case with a high linear growth rate. In addition, the model confirms the theoretical prediction of a stable phase-space hole during the nonlinear growth process. The plasma parameters and L shell used in this study are typical of those associated with the Siple Station wave injection experiment.
dc.description.fulltextYES
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue23
dc.description.openaccessYES
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipAFRL Award
dc.description.sponsorshipNSF CAREER Award
dc.description.versionPublisher version
dc.description.volume41
dc.identifier.doi10.1002/2014GL061787
dc.identifier.eissn1944-8007
dc.identifier.embargoNO
dc.identifier.filenameinventorynoIR00977
dc.identifier.issn0094-8276
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-84921611885
dc.identifier.urihttps://hdl.handle.net/20.500.14288/1956
dc.identifier.wos348462000007
dc.keywordsCyclotron instability
dc.keywordsCoherent wave instability
dc.keywordsRadiation belts
dc.keywordsMagnetosphere
dc.keywordsWave amplification
dc.keywordsPhase space
dc.language.isoeng
dc.publisherAmerican Geophysical Union (AGU)
dc.relation.grantnoFA9453-11-C-0011
dc.relation.grantno27239350-50917-B
dc.relation.grantnoAGS 1254365
dc.relation.ispartofGeophysical Research Letters
dc.relation.urihttp://cdm21054.contentdm.oclc.org/cdm/ref/collection/IR/id/982
dc.subjectMultidisciplinary geosciences
dc.subjectGeology
dc.titleFinite difference modeling of coherent wave amplification in the Earth's radiation belts
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorİnan, Umran Savaş
local.publication.orgunit1College of Engineering
local.publication.orgunit2Department of Electrical and Electronics Engineering
relation.isOrgUnitOfPublication21598063-a7c5-420d-91ba-0cc9b2db0ea0
relation.isOrgUnitOfPublication.latestForDiscovery21598063-a7c5-420d-91ba-0cc9b2db0ea0
relation.isParentOrgUnitOfPublication8e756b23-2d4a-4ce8-b1b3-62c794a8c164
relation.isParentOrgUnitOfPublication.latestForDiscovery8e756b23-2d4a-4ce8-b1b3-62c794a8c164

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