globalchange  > 气候减缓与适应
DOI: 10.1002/2014GL062070
论文题名:
Electron and ion heating by whistler turbulence: Three-dimensional particle-in-cell simulations
作者: Hughes R.S.; Gary S.P.; Wang J.
刊名: Geophysical Research Letters
ISSN: 0094-9455
EISSN: 1944-9186
出版年: 2014
卷: 41, 期:24
起始页码: 8681
结束页码: 8687
语种: 英语
英文关键词: particle-in-cell simulations ; whistler turbulence
Scopus关键词: Collisionless plasmas ; Electrons ; Heating ; Ions ; Particle beam dynamics ; Plasma heating ; Turbulence ; Electron ion plasma ; Linear dispersion ; Particle-in-cell simulations ; Propagation direction ; Shorter wavelength ; Temporal evolution ; Three dimensional particle-in-cell simulations ; Turbulent spectrum ; Plasma simulation ; computer simulation ; electron ; heating ; magnetic field ; temporal evolution ; three-dimensional modeling ; turbulence ; wavelength
英文摘要: Three-dimensional particle-in-cell simulations of decaying whistler turbulence are carried out on a collisionless, homogeneous, magnetized, electron-ion plasma model. The simulations use an initial ensemble of relatively long wavelength whistler modes with a broad range of initial propagation directions with an initial electron beta βe = 0.05. The computations follow the temporal evolution of the fluctuations as they cascade into broadband turbulent spectra at shorter wavelengths. Three simulations correspond to successively larger simulation boxes and successively longer wavelengths of the initial fluctuations. The computations confirm previous results showing electron heating is preferentially parallel to the background magnetic field Bo, and ion heating is preferentially perpendicular to Bo. The new results here are that larger simulation boxes and longer initial whistler wavelengths yield weaker overall dissipation, consistent with linear dispersion theory predictions of decreased damping, stronger ion heating, consistent with a stronger ion Landau resonance, and weaker electron heating. Key Points Whistler turbulence heats both electrons and ionsLonger wavelength whistler turbulence leads to stronger ion heatingBoth electron and ion heating is anisotropic ©2014. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921855861&doi=10.1002%2f2014GL062070&partnerID=40&md5=28a9d56926c4a030bbd64a37f5a10ec2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6719
Appears in Collections:气候减缓与适应

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作者单位: University of Southern California, Los Angeles, CA, United States

Recommended Citation:
Hughes R.S.,Gary S.P.,Wang J.. Electron and ion heating by whistler turbulence: Three-dimensional particle-in-cell simulations[J]. Geophysical Research Letters,2014-01-01,41(24).
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