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Parametric instability induced by X-mode Heating at EISCAT

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<mark>Journal publication date</mark>10/2016
<mark>Journal</mark>Journal of Geophysical Research: Space Physics
Issue number10
Volume121
Number of pages13
Pages (from-to)10536-10548
<mark>State</mark>Published
Early online date26/10/16
<mark>Original language</mark>English

Abstract

In this paper, we present results of parametric instability induced by X-mode wave heating observed by EISCAT (European Incoherent Scatter Scientific Association) radar at Tromsø, Norway. Three typical X-mode ionospheric heating experiments on October 22, 2013, October 19, 2012 and February 21, 2013 are investigated in details. Both parametric decay instability (PDI) and oscillating two-stream instability (OTSI) are observed during the X-mode heating period. We suggest that the full dispersion relationship of the Langmuir wave can be employed to analyze the X-mode parametric instability excitation. Parallel electric field component of X-mode heating wave can also exceed the parametric instability excitation threshold under certain conditions.

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