Publication:
Cluster observations of whistler mode ducts and banded chorus

dc.contributor.coauthorHaque, N.
dc.contributor.coauthorBell, T. F.
dc.contributor.coauthorPickett, J. S.
dc.contributor.coauthorTrotignon, J. G.
dc.contributor.coauthorFacsko, G.
dc.contributor.departmentDepartment of Electrical and Electronics Engineering
dc.contributor.kuauthorİnan, Umran Savaş
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.date.accessioned2024-11-09T13:44:47Z
dc.date.issued2011
dc.description.abstractBell et al. (2009) proposed that the source region for banded chorus consists of whistler mode ducts of depleted electron density (N-e) for upper band (UB) chorus for all wave normal angles (theta) and ducts of either enhanced or depleted N-e for lower band (LB) chorus for small theta and theta near or greater than the Gendrin angle, respectively. This paper provides support for this model using new high resolution (17 km) N-e observations from the Cluster WHISPER and EFW instruments. Data is examined from January 20, 2004, when strong banded chorus was observed over 3000 km of the Cluster 2 orbit, ending at the magnetic equator. Previous analysis of LB chorus on this day indicated the wave normal angles were larger than the Gendrin angle. Using the N-e data, we show that the LB chorus is generated within depletion ducts in the source region and that the half-width of these ducts (similar to 70 km) is comparable to the transverse scale (similar to 100 km) of the chorus source region. Making use of the fact that the group velocity of the LB chorus waves has a significant cross-L component, we show that the source region extends over 500 km near the magnetic equator.
dc.description.fulltextYES
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue18
dc.description.openaccessYES
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipNASA
dc.description.sponsorshipONR
dc.description.versionPublisher version
dc.description.volume38
dc.identifier.doi10.1029/2011GL049112
dc.identifier.eissn1944-8007
dc.identifier.embargoNO
dc.identifier.filenameinventorynoIR00974
dc.identifier.issn0094-8276
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-80053234736
dc.identifier.urihttps://doi.org/10.1029/2011GL049112
dc.identifier.wos295523000002
dc.keywordsPlasma
dc.keywordsEmissions
dc.keywordsPropagation
dc.keywordsDensity
dc.language.isoeng
dc.publisherAmerican Geophysical Union (AGU)
dc.relation.grantnoNNX07AI24G
dc.relation.grantno1000604077
dc.relation.grantnoN000140710789
dc.relation.grantnoZ882802
dc.relation.ispartofGeophysical Research Letters
dc.relation.urihttp://cdm21054.contentdm.oclc.org/cdm/ref/collection/IR/id/978
dc.subjectMultidisciplinary geosciences
dc.titleCluster observations of whistler mode ducts and banded chorus
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorİnan, Umran Savaş
local.publication.orgunit1College of Engineering
local.publication.orgunit2Department of Electrical and Electronics Engineering
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