Parametric instability induced by X-mode Heating at EISCAT

• Published in: Journal of Geophysical Research: Space Physics
• Main Authors: Wang, Xiang, Zhou, Chen, Honary, Farideh, Ni, Binbin, Zhao, Zhengyu
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2016
• Subjects: Langmuir; Norway; Tromsø; EISCAT
• Online Access: https://eprints.lancs.ac.uk/id/eprint/82109/; https://eprints.lancs.ac.uk/id/eprint/82109/1/Wang_et_al_2016_Journal_of_Geophysical_Research_Space_Physics.pdf; https://doi.org/10.1002/2016JA023070

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.