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Preferential Heating of Oxygen 5+ Ions by Finite-Amplitude Oblique Alfven Waves
External Online Source: doi:10.1063/1.4943822
Author and Affiliation:
Maneva, Yana G.(Katholieke Univ. te Leuven, Belgium);
Vinas, Adolfo(NASA Goddard Space Flight Center, Greenbelt, MD United States);
Araneda, Jamie(Universidad de Concepcion, Dept. of Physics, Chile);
Poedts, Stefaan(Katholieke Univ. te Leuven, Belgium)
Abstract: Minor 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.
Publication Date: Mar 01, 2016
Document ID:
20170006122
(Acquired Jul 14, 2017)
Subject Category: SOLAR PHYSICS; PLASMA PHYSICS
Report/Patent Number: GSFC-E-DAA-TN43260
ISBN: ISBN 978-0-7354-1367-2
Document Type: Conference Paper
Publication Information: American Institute of Physics; Volume 1720; Issue 1; 040011
Publisher Information: American Institute of Physics
Meeting Information: Solar Wind 14: International Solar Wind Conference; 14th; 22-26 Jun. 2016; Weihai; China
Meeting Sponsor: American Inst. of Physics; College Park, MD, United States
Contract/Grant/Task Num: 12K1416N
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CYCLOTRON RADIATION; HIGH TEMPERATURE; INTERPLANETARY SPACE; ION DISTRIBUTION; MAGNETOHYDRODYNAMIC WAVES; OXYGEN IONS; PLASMA HEATING; PROTONS; SOLAR WIND; STABILITY; VELOCITY DISTRIBUTION; ANISOTROPY; DISTRIBUTION FUNCTIONS; ISOTROPIC MEDIA; PLASMA DIFFUSION; PLASMA WAVES; SOLAR CORONA; WAVE DISPERSION
Availability Source: Other Sources
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