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Ion flux dropout observed near dipolarization front
Shi, Xueling; Chen, Tao; Zhang, Lingqian; Duan, Suping; Liu, Jiang; He, Zhaohai; Chen, T (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationCHINESE SCIENCE BULLETIN
2014
Volume59Issue:34Pages:4790-4796
ISSN1001-6538
Language英语
KeywordBbf Dipolarization Front Ion Flux Dropout Themis Plasma Sheet
AbstractAn ion flux dropout near the dipolarization front (DF) at around X (GSM) = -11 R-E in the Earth's plasma sheet was observed by Time History of Events and Macroscale Interaction during substorms (THEMIS) on March 31, 2009. The ion differential energy fluxes at energies from 450 eV to 150 keV measured by the ESA and SST instruments from THC began to decrease about 2 s before the detection of the DF and reached a local minimum 6 s later. Then, the ion fluxes gradually increased to form a dropout around the DF. The spatial extent of the dropout was about 4,000 km. For energies above 20 keV, the ion fluxes after the dropout are greater than those before it, contrary to the fluxes at energies below 20 keV. The associated ion density variation indicates that the ion flux dropout coincides with the ion density dropout. Taking advantage of multipoint observations, THD, THC, and THE detected the same DF consecutively. Only THC detected an obvious ion flux dropout; THD observed an indistinct one about 2 s before THC; no high-energy (E > 30 keV) ion flux dropout was observed by THE. Our study suggests that the ion flux dropout may evolve with the earthward-propagating DF, and its properties can depend on locations relative to the DF.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4472
Collection空间科学部
Corresponding AuthorChen, T (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Shi, Xueling,Chen, Tao,Zhang, Lingqian,et al. Ion flux dropout observed near dipolarization front[J]. CHINESE SCIENCE BULLETIN,2014,59(34):4790-4796.
APA Shi, Xueling.,Chen, Tao.,Zhang, Lingqian.,Duan, Suping.,Liu, Jiang.,...&Chen, T .(2014).Ion flux dropout observed near dipolarization front.CHINESE SCIENCE BULLETIN,59(34),4790-4796.
MLA Shi, Xueling,et al."Ion flux dropout observed near dipolarization front".CHINESE SCIENCE BULLETIN 59.34(2014):4790-4796.
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