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A Case Study of Transversely Heated Low­Energy Helium Ions by EMIC Waves in the Plasmasphere

Cited 4 time in wos
Cited 4 time in scopus

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dc.contributor.authorKim, Khan-Hyuk-
dc.contributor.authorKwon, Hyuck-Jin-
dc.contributor.authorLee, Junhyun-
dc.contributor.authorJin, Ho-
dc.contributor.authorSeough, Jungjoon-
dc.date.accessioned2021-05-11T01:32:52Z-
dc.date.available2021-05-11T01:32:52Z-
dc.date.issued2021-02-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/11949-
dc.description.abstractThe Van Allen Probe A spacecraft observed strong ∼0.5­Hz helium (He+) band and weak ∼0.8­Hz hydrogen (H+) band EMIC waves on April 17, 2018, at L = similar to 4.5-5.2, in the dawn sector, near the magnetic equator, and close to the plasmapause. We examined low­energy ion fluxes observed by the Helium Oxygen Proton and Electron (HOPE) instrument onboard Van Allen Probe A during the wave interval and found that low­energy He+ flux (<10 eV) enhancements occur nearly simultaneously with He­band and H­band EMIC wave power enhancements in a direction mostly perpendicular to the background magnetic field without significant low­energy H+ and O+ flux variations. We suggest that cold He+ ions (<1 eV) are preferentially and transversely heated up 10 eV through the interaction with EMIC waves inside the plasmasphere. The low­Earth orbit spacecraft observed localized precipitations of energetic protons in the upper ionosphere at subauroral latitudes near the magnetic field footprint of Van Allen Probe A. Our observations provide a clear evidence that EMIC waves play an important role in the overall dynamics in the inner magnetosphere, contributing to the high­energy particle loss and low­energy particle energization.en_US
dc.languageEnglishen_US
dc.language.isoen_USen_US
dc.subjectAstronomy & Astrophysicsen_US
dc.subject.classification해당사항없음en_US
dc.titleA Case Study of Transversely Heated Low­Energy Helium Ions by EMIC Waves in the Plasmasphereen_US
dc.title.alternative플라즈마권에서 발생한 EMIC 파동에 의한 저에너지 이온 입자의 가속 현상 분석en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationKim, Khan-Hyuk, et al. 2021. "A Case Study of Transversely Heated Low­Energy Helium Ions by EMIC Waves in the Plasmasphere". <em>JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS</em>, 126(2): 1-16.-
dc.citation.titleJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.citation.volume126en_US
dc.citation.number2en_US
dc.identifier.doi10.1029/2020JA028560-
dc.citation.startPage1en_US
dc.citation.endPage16en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2019:41.176en_US
dc.identifier.localId2021-0046-
dc.identifier.scopusid2-s2.0-85102135471-
dc.identifier.wosid000627265100020-
Appears in Collections  
2021-2021, Occurrence of aurora and their correlations with polar upper atmospheric and climate variabilities (21-21) / Jee, Geonhwa (PE21020)
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