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Direct Measurement of the Dissipation Rate Spectrum around Ion Kinetic Scales in Space Plasma Turbulence
He, Jiansen; Duan, Die; Wang, Tieyan; Zhu, Xingyu; Li, Wenya; Verscharen, Daniel; Wang, Xin; Tu, Chuanyi; Khotyaintsev, Yuri; Le, Guan; Burch, Jim
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2019
Volume880Issue:2Pages:121
DOI10.3847/1538-4357/ab2a79
ISSN0004-637X
Language英语
Keywordplasmas turbulence waves
AbstractThe energy of turbulence in the universe, which cascades from large fluid scales to small kinetic scales, is believed to be dissipated through conversion to thermal or nonthermal kinetic energy. However, identifying the dissipation processes and measuring the dissipation rate in turbulence remain challenging. Based on unprecedented high-quality measurements of space plasma turbulence by the Magnetospheric Multiscale mission, we propose a novel approach to measure the scale-dependent spectrum of the energy conversion rate between the fluctuating electromagnetic energy and plasma kinetic energy. The energy conversion rate spectrum is found to show a positive bulge around the ion kinetic scale, which clearly indicates the dissipation of the turbulent energy. The energy dissipation rate around the ion scale is estimated to be 0.5 x 10(6) J kg(-1) s(-1). This work provides basic information on local dissipation in magnetosheath turbulence and sets up a new paradigm for studying the dissipation of universal plasma turbulence.
Indexed BySCI
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7247
Collection空间科学部
Recommended Citation
GB/T 7714
He, Jiansen,Duan, Die,Wang, Tieyan,et al. Direct Measurement of the Dissipation Rate Spectrum around Ion Kinetic Scales in Space Plasma Turbulence[J]. ASTROPHYSICAL JOURNAL,2019,880(2):121.
APA He, Jiansen.,Duan, Die.,Wang, Tieyan.,Zhu, Xingyu.,Li, Wenya.,...&Burch, Jim.(2019).Direct Measurement of the Dissipation Rate Spectrum around Ion Kinetic Scales in Space Plasma Turbulence.ASTROPHYSICAL JOURNAL,880(2),121.
MLA He, Jiansen,et al."Direct Measurement of the Dissipation Rate Spectrum around Ion Kinetic Scales in Space Plasma Turbulence".ASTROPHYSICAL JOURNAL 880.2(2019):121.
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