Possible Mechanism for Damping of Electrostatic Instability Related to Inhomogeneous Distribution of Energy Density in the Auroral Ionosphere
- Authors: Golovchanskaya I.V.1, Kozelov B.V.1, Chernyshov A.A.2, Ilyasov A.A.2, Mogilevsky M.M.2
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Affiliations:
- Polar Geophysical Institute
- Space Research Institute
- Issue: Vol 58, No 2 (2018)
- Pages: 223-228
- Section: Article
- URL: https://journals.rcsi.science/0016-7932/article/view/156693
- DOI: https://doi.org/10.1134/S0016793218020081
- ID: 156693
Cite item
Abstract
Satellite observations show that the electrostatic instability, which is expected to occur in most cases due to an inhomogeneous energy density caused by a strongly inhomogeneous transverse electric field (shear of plasma convection velocity), occasionally does not develop inside nonlinear plasma structures in the auroral ionosphere, even though the velocity shear is sufficient for its excitation. In this paper, it is shown that the instability damping can be caused by out-of-phase variations of the electric field and field-aligned current acting in these structures. Therefore, the mismatch of sources of free energy required for the wave generation nearly nullifies their common effect.
About the authors
I. V. Golovchanskaya
Polar Geophysical Institute
Email: achernyshov@iki.rssi.ru
Russian Federation, Apatity, 184209
B. V. Kozelov
Polar Geophysical Institute
Email: achernyshov@iki.rssi.ru
Russian Federation, Apatity, 184209
A. A. Chernyshov
Space Research Institute
Author for correspondence.
Email: achernyshov@iki.rssi.ru
Russian Federation, Moscow, 117997
A. A. Ilyasov
Space Research Institute
Email: achernyshov@iki.rssi.ru
Russian Federation, Moscow, 117997
M. M. Mogilevsky
Space Research Institute
Email: achernyshov@iki.rssi.ru
Russian Federation, Moscow, 117997
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