Aspect dependence of Parametric Instability Excitation by X-mode at EISCAT
Recent studies of X-mode wave heating experiments observed by EISCAT(European Incoherent Scatter Scientific Association)UHF radar indicate that parametric instability(PI)can be excited unexpectedly.In this paper,we re-investigate the ionospheric heating experiment on October 21,2012 in details.The observed HF-enhanced ion lines(HFILs)and HF-enhanced plasma lines(HFPLs)observed during the experiment presents dependence on the heating incidence angles.The observational evidence and numerical calculation that the parallel electric field of X-mode heating wave can exceed the PI excitation threshold at certain angles indicate the decisive role of parallel electric field for the PI excitation.The excited HFPLs and HFILs during X-mode heating cycles also present the evidence for the non-Maxwellian distribution of the electrons in the heated region.
ionosphere heating experiment X-mode EM wave parametric instability EISCAT
Xiang Wang Chen Zhou Moran Liu Ting Feng Binbin Ni Zhegnyu Zhao
Depatment of Space Physics Wuhan University Wuhan,P.R.C.
国际会议
杭州
英文
1-6
2018-12-03（万方平台首次上网日期，不代表论文的发表时间）