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Cluster Observations on Timeâ ofâ Flight Effect of Oxygen Ions in Magnetotail Reconnection Exhaust Region
dc.contributor.authorWu, T.
dc.contributor.authorFu, S. Y.
dc.contributor.authorXie, L.
dc.contributor.authorZong, Q.‐g.
dc.contributor.authorZhou, X. Z.
dc.contributor.authorYue, C.
dc.contributor.authorSun, W. J.
dc.contributor.authorPu, Z. Y.
dc.contributor.authorXiong, Y.
dc.contributor.authorZhao, S. J.
dc.contributor.authorZhang, H.
dc.contributor.authorYu, F. B.
dc.date.accessioned2020-02-05T15:03:43Z
dc.date.availableWITHHELD_13_MONTHS
dc.date.available2020-02-05T15:03:43Z
dc.date.issued2020-02-16
dc.identifier.citationWu, T.; Fu, S. Y.; Xie, L.; Zong, Q.‐g. ; Zhou, X. Z.; Yue, C.; Sun, W. J.; Pu, Z. Y.; Xiong, Y.; Zhao, S. J.; Zhang, H.; Yu, F. B. (2020). "Cluster Observations on Timeâ ofâ Flight Effect of Oxygen Ions in Magnetotail Reconnection Exhaust Region." Geophysical Research Letters 47(3): n/a-n/a.
dc.identifier.issn0094-8276
dc.identifier.issn1944-8007
dc.identifier.urihttps://hdl.handle.net/2027.42/153535
dc.description.abstractThe Dâ shaped ion velocity distribution generated by the timeâ ofâ flight (ToF) effect can be considered as an important characteristic of reconnection exhausts in the magnetopause and magnetotail reconnection processes. In this study, we reported the Dâ shaped velocity distribution of O+ ions produced by the ToF effect in the magnetotail reconnection exhaust based on the observations from the Cluster spacecraft. The observed cutoff velocity of O+ ions is smaller than that of H+ ions at the same time, which is different from the previous theoretical prediction. We suggested that the difference between the two cutoff velocities is probably due to O+ ions having a larger reconnection diffusion region than H+ ions. We also demonstrated a remoteâ sensing method to estimate the spatial scale ratio between the O+ and H+ diffusion regions and the distance from the observation site to the center of the magnetotail reconnection region.Plain Language SummaryThe reconnection processes at the Earth’s magnetopause and magnetotail can convert the magnetic energy into the kinetic energy of the plasma, thus producing highâ speed reconnection exhausts. The exhausting ions usually show a Dâ shaped velocity distribution caused by the timeâ ofâ flight effect. Previous works usually focused only on exhausting protons from the reconnection site, while O+ ions could also be abundant during geomagnetic active times. In this study, we analyzed a reconnection event to investigate the behaviors of O+ and H+ ions in the magnetotail reconnection exhaust region using the observations from the Cluster spacecraft. It is suggested that different behaviors of H+ and O+ ions are probably due to O+ ions having a larger reconnection diffusion region than H+ ions. In addition, we proposed a remoteâ sensing method to estimate the spatial scale ratio between the O+ and H+ diffusion regions and the distance from the observation site to the center of the magnetotail reconnection region.Key PointsThe timeâ ofâ flight effect of O+ ions in magnetotail reconnection exhaust was observed by the Cluster spacecraftThe observed cutoff velocity of O+ is smaller than that of H+, indicating that O+ may have a larger diffusion region than H+A remoteâ sensing method to estimate the spatial scale ratio between O+ and H+ diffusion regions is introduced
dc.publisherWiley Periodicals, Inc.
dc.publisherElsevier
dc.subject.othermagnetic reconnection
dc.subject.otherreconnection outflow
dc.subject.otheroxygen ions
dc.titleCluster Observations on Timeâ ofâ Flight Effect of Oxygen Ions in Magnetotail Reconnection Exhaust Region
dc.typeArticle
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelGeological Sciences
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/153535/1/grl60154.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/153535/2/grl60154_am.pdf
dc.identifier.doi10.1029/2019GL085200
dc.identifier.sourceGeophysical Research Letters
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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