“Trunk-like” heavy ion structures observed by the Van Allen Probes
| dc.citation.firstpage | 8738 | |
| dc.citation.issueNumber | 10 | |
| dc.citation.journalTitle | Journal of Geophysical Research: Space Physics | |
| dc.citation.lastpage | 8748 | |
| dc.citation.volumeNumber | 120 | |
| dc.contributor.author | Zhang, J.-C. | |
| dc.contributor.author | Kistler, L.M. | |
| dc.contributor.author | Spence, H.E. | |
| dc.contributor.author | Wolf, R.A. | |
| dc.contributor.author | Reeves, G. | |
| dc.contributor.author | Skoug, R. | |
| dc.contributor.author | Funsten, H. | |
| dc.contributor.author | Larsen, B.A. | |
| dc.contributor.author | Niehof, J.T. | |
| dc.contributor.author | MacDonald, E.A. | |
| dc.contributor.author | Friedel, R. | |
| dc.contributor.author | Ferradas, C.P. | |
| dc.contributor.author | Luo, H. | |
| dc.date.accessioned | 2017-05-12T17:10:13Z | |
| dc.date.available | 2017-05-12T17:10:13Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | Dynamic ion spectral features in the inner magnetosphere are the observational signatures of ion acceleration, transport, and loss in the global magnetosphere. We report “trunk-like” ion structures observed by the Van Allen Probes on 2 November 2012. This new type of ion structure looks like an elephant's trunk on an energy-time spectrogram, with the energy of the peak flux decreasing Earthward. The trunks are present in He+ and O+ ions but not in H+. During the event, ion energies in the He+ trunk, located at L = 3.6–2.6, magnetic local time (MLT) = 9.1–10.5, and magnetic latitude (MLAT) = −2.4–0.09°, vary monotonically from 3.5 to 0.04 keV. The values at the two end points of the O+ trunk are energy = 4.5–0.7 keV, L = 3.6–2.5, MLT = 9.1–10.7, and MLAT = −2.4–0.4°. Results from backward ion drift path tracings indicate that the trunks are likely due to (1) a gap in the nightside ion source or (2) greatly enhanced impulsive electric fields associated with elevated geomagnetic activity. Different ion loss lifetimes cause the trunks to differ among ion species. | |
| dc.identifier.citation | Zhang, J.-C., Kistler, L.M., Spence, H.E., et al.. "“Trunk-like” heavy ion structures observed by the Van Allen Probes." <i>Journal of Geophysical Research: Space Physics,</i> 120, no. 10 (2015) Wiley: 8738-8748. http://dx.doi.org/10.1002/2015JA021822. | |
| dc.identifier.doi | http://dx.doi.org/10.1002/2015JA021822 | |
| dc.identifier.uri | https://hdl.handle.net/1911/94237 | |
| dc.language.iso | eng | |
| dc.publisher | Wiley | |
| dc.rights | Article 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. | |
| dc.title | “Trunk-like” heavy ion structures observed by the Van Allen Probes | |
| dc.type | Journal article | |
| dc.type.dcmi | Text | |
| dc.type.publication | publisher version |
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