Electric and magnetic radial diffusion coefficients using the Van Allen probes data

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dc.citation.firstpage9586en_US
dc.citation.issueNumber10en_US
dc.citation.journalTitleJournal of Geophysical Research: Space Physicsen_US
dc.citation.lastpage9607en_US
dc.citation.volumeNumber121en_US
dc.contributor.authorAli, Ashar F.en_US
dc.contributor.authorMalaspina, David M.en_US
dc.contributor.authorElkington, Scot R.en_US
dc.contributor.authorJaynes, Allison N.en_US
dc.contributor.authorChan, Anthony A.en_US
dc.contributor.authorWygant, Johnen_US
dc.contributor.authorKletzing, Craig A.en_US
dc.date.accessioned2017-05-19T19:09:40Zen_US
dc.date.available2017-05-19T19:09:40Zen_US
dc.date.issued2016en_US
dc.description.abstractULF waves are a common occurrence in the inner magnetosphere and they contribute to particle motion, significantly, at times. We used the magnetic and the electric field data from the Electric and Magnetic Field Instrument Suite and Integrated Sciences (EMFISIS) and the Electric Field and Waves instruments (EFW) on board the Van Allen Probes to estimate the ULF wave power in the compressional component of the magnetic field and the azimuthal component of the electric field, respectively. Using L∗, Kp, and magnetic local time (MLT) as parameters, we conclude that the noon sector contains higher ULF Pc-5 wave power compared with the other MLT sectors. The dawn, dusk, and midnight sectors have no statistically significant difference between them. The drift-averaged power spectral densities are used to derive the magnetic and the electric component of the radial diffusion coefficient. Both components exhibit little to no energy dependence, resulting in simple analytic models for both components. More importantly, the electric component is larger than the magnetic component by one to two orders of magnitude for almost all L∗ and Kp; thus, the electric field perturbations are more effective in driving radial diffusion of charged particles in the inner magnetosphere. We also present a comparison of the Van Allen Probes radial diffusion coefficients, including the error estimates, with some of the previous published results. This allows us to gauge the large amount of uncertainty present in such estimates.en_US
dc.identifier.citationAli, Ashar F., Malaspina, David M., Elkington, Scot R., et al.. "Electric and magnetic radial diffusion coefficients using the Van Allen probes data." <i>Journal of Geophysical Research: Space Physics,</i> 121, no. 10 (2016) Wiley: 9586-9607. https://doi.org/10.1002/2016JA023002.en_US
dc.identifier.doihttps://doi.org/10.1002/2016JA023002en_US
dc.identifier.urihttps://hdl.handle.net/1911/94299en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleElectric and magnetic radial diffusion coefficients using the Van Allen probes dataen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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