Premium
Parametric instability induced by X ‐mode wave heating at EISCAT
Author(s) -
Wang Xiang,
Zhou Chen,
Liu Moran,
Honary Farideh,
Ni Binbin,
Zhao Zhengyu
Publication year - 2016
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/2016ja023070
Subject(s) - instability , parametric statistics , excitation , physics , incoherent scatter , two stream instability , computational physics , f region , ionosphere , mode (computer interface) , dispersion relation , atomic physics , optics , mechanics , geophysics , computer science , mathematics , statistics , quantum mechanics , operating system
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 22 October 2013, 19 October 2012, and 21 February 2013 are investigated in details. Both parametric decay instability (PDI) and oscillating two‐stream instability 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. A modified kinetic electron distribution is proposed and analyzed, which is able to satisfy the matching condition of parametric instability excitation. Parallel electric field component of X ‐mode heating wave can also exceed the parametric instability excitation threshold under certain conditions.