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Title: Drift waves in the corona : heating and acceleration of ions at frequencies far below the gyrofrequency
Authors: Vranjes, Jovo ×
Poedts, Stefaan #
Issue Date: 25-Jun-2010
Publisher: Priestley and Weale
Series Title: Monthly Notices of the Royal Astronomical Society vol:408 issue:3 pages:1835-1839
Abstract: In the solar corona, several mechanisms of the drift wave instability can make the mode grow to amplitudes at which particle acceleration and stochastic heating by the drift wave take place. The stochastic heating, well known from laboratory plasma physics where it has been confirmed in numerous experiments, has been completely ignored in past studies of coronal heating. However, in the present study and in our very recent works it has been shown that the inhomogeneous coronal plasma is, in fact, a perfect environment for fast growing drift waves. As a matter of fact, the large growth rates are typically of the same order as the wave frequency. The consequent heating rates may exceed the required values for sustained coronal heating by several orders of magnitude. Some aspects of these phenomena are investigated here. In particular, the analysis of the particle dynamics within the growing wave is compared with the corresponding fluid analysis. While both of them predict the stochastic heating, the threshold for the heating obtained from the single particle analysis is higher. The explanation for this effect is given.
ISSN: 0035-8711
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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