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Preferential Heating of Oxygen 5+ Ions by Finite-Amplitude Oblique Alfven WavesMinor ions in the fast solar wind are known to have higher temperatures and to flow faster than protons in the interplanetary space. In this study we combine previous research on parametric instability theory and 2.5D hybrid simulations to study the onset of preferential heating of Oxygen 5+ ions by large-scale finite-amplitude Alfven waves in the collisionless fast solar wind. We consider initially non-drifting isotropic multi-species plasma, consisting of isothermal massless fluid electrons, kinetic protons and kinetic Oxygen 5+ ions. The external energy source for the plasma heating and energization are oblique monochromatic Alfven-cyclotron waves. The waves have been created by rotating the direction of initial parallel pump, which is a solution of the multi-fluid plasma dispersion relation. We consider propagation angles theta less than or equal to 30 deg. The obliquely propagating Alfven pump waves lead to strong diffusion in the ion phase space, resulting in highly anisotropic heavy ion velocity distribution functions and proton beams. We discuss the application of the model to the problems of preferential heating of minor ions in the solar corona and the fast solar wind.
Document ID
20170006122
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
External Source(s)
Authors
Maneva, Yana G.
(Katholieke Univ. te Leuven Belgium)
Vinas, Adolfo
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Araneda, Jamie
(Universidad de Concepcion Chile)
Poedts, Stefaan
(Katholieke Univ. te Leuven Belgium)
Date Acquired
July 6, 2017
Publication Date
March 1, 2016
Publication Information
Publication: American Institute of Physics
Publisher: American Institute of Physics
Volume: 1720
Issue: 1
ISBN: 978-0-7354-1367-2
Subject Category
Solar Physics
Plasma Physics
Report/Patent Number
GSFC-E-DAA-TN43260
Meeting Information
Meeting: Solar Wind 14: International Solar Wind Conference
Location: Weihai
Country: China
Start Date: June 22, 2016
End Date: June 26, 2016
Sponsors: American Inst. of Physics
Funding Number(s)
CONTRACT_GRANT: 12K1416N
Distribution Limits
Public
Copyright
Other

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