Numerical calculations of relativistic electron drift loss effect

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dc.contributor.authorKim, Kyung Chanen_US
dc.contributor.authorLee, Daeyoungen_US
dc.contributor.authorKim, Heejeongen_US
dc.contributor.authorLyons, Larry R.en_US
dc.contributor.authorLee, Ensangen_US
dc.contributor.authorÖztürk, Mehmet Kaanen_US
dc.contributor.authorChoi, Cheongrimen_US
dc.date.accessioned2015-01-15T23:01:06Z
dc.date.available2015-01-15T23:01:06Z
dc.date.issued2008-09-09
dc.departmentIşık Üniversitesi, Fen Edebiyat Fakültesi, Enformasyon Teknolojileri Bölümüen_US
dc.departmentIşık University, Faculty of Arts and Sciences, Department of Information Technologiesen_US
dc.descriptionThis work at Chungbuk National University was supported partly by a grant from Korea Astronomy and Space Science Institute in 2006 and also partly by a grant (R01-2007-000-10674-0) from the Korea Science and Engineering Foundation. Work at UCLA was supported in part by NSF grant ATM-0646233en_US
dc.description.abstractIt has been suggested that drift loss to the magnetopause can be one of the major loss mechanisms contributing to relativistic electron flux dropouts. In this study, we examine details of relativistic electrons' drift physics to determine the extent to which the drift loss through the magnetopause is important to the total loss of the outer radiation belt. We have numerically computed drift paths of relativistic electrons' guiding center for various pitch angles, various measurement positions, and different solar wind conditions using the Tsyganenko T02 model. We specifically demonstrate how the drift loss effect depends on these various parameters. Most importantly, we present various estimates of relative changes of the omnidirectional flux of 1 MeV electrons between two different solar wind conditions based on a simple form of the directional flux function. For a change of the dynamic pressure from 4 nPa to 10 nPa with a fixed IMF B-Z = 0 nT, our estimate indicates that after this increase in pressure, the equatorial omnidirectional flux at midnight near geosynchronous altitude decreases by similar to 56 to similar to 97%, depending on the specific pitch angle dependence of the directional flux. The effect rapidly decreases at regions earthward of geosynchronous orbit and shows a general trend of decrease away from midnight. For a change of the IMF BZ from 0 nT to -15 nT with a fixed dynamic pressure of 4 nPa, the relative decrease of the omnidirectional flux at geosynchronous altitude on the nightside is much smaller than that for the pressure increase, but its effect becomes substantial only beyond geosynchronous orbit. Possibilities exist that our results may change to some extent for a different magnetospheric model than the one used here.en_US
dc.description.sponsorshipKorea Astronomy and Space Science Instituteen_US
dc.description.sponsorshipKorea Science and Engineering Foundationen_US
dc.description.sponsorshipNational Science Foundation (NSF)en_US
dc.description.sponsorshipNational Research Foundation of Koreaen_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationKim, K. C., Lee, D. -., Kim, H. -., Lyons, L. R., Lee, E. S., Öztürk, M. K., & Choi, C. R. (2008). Numerical calculations of relativistic electron drift loss effect. Journal of Geophysical Research A: Space Physics, 113(9) doi:10.1029/2007JA013011en_US
dc.identifier.doi10.1029/2007JA013011
dc.identifier.endpage14
dc.identifier.issn2169-9380
dc.identifier.issn2169-9402
dc.identifier.issueA9
dc.identifier.scopus2-s2.0-56749173634
dc.identifier.scopusqualityQ2
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/11729/289
dc.identifier.urihttp://dx.doi.org/10.1029/2007JA013011
dc.identifier.volume113
dc.identifier.wosWOS:000259203600004
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorÖztürk, Mehmet Kaanen_US
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherAmer Geophysical Unionen_US
dc.relation.ispartofJournal of Geophysical Research-Space Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDawn-Dusk Asymmetryen_US
dc.subjectMagnetic Stormen_US
dc.subjectGeosynchronous Orbiten_US
dc.subjectMagnetosphereen_US
dc.subjectPrecipitationen_US
dc.subjectAccelerationen_US
dc.subjectDropoutsen_US
dc.subjectModelen_US
dc.subjectTimeen_US
dc.titleNumerical calculations of relativistic electron drift loss effecten_US
dc.typeArticleen_US
dspace.entity.typePublication

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