Altitude and intensity characteristics of parametric instability excited by an HF pump wave near the fifth electron harmonic  

作　　者：吴军 吴健 M T RIETVELD I HAGGSTROM 赵海生 许正文 

机构地区：[1]National Key Laboratory of Electromagnetic Environment,China Research Institute of Radio Wave Propagation,Beijing 102206,People's Republic of China [2]EISCAT,NO-9027 Ramfjordbotn,Norway [3]UiT,The Arctic University of Norway,Tromso,Norway [4]EISCAT Scientific Association,Kiruna,Sweden

出　　处：《Plasma Science and Technology》2017年第12期50-56,共7页等离子体科学和技术（英文版）

基　　金：supported by China(China Research Institute of Radio Wave Propagation);Finland(Suomen Akatemia of Finland);Japan(the National Institute of Polar Research of Japan and Institute for Space-Earth Environmental Research at Nagoya University);Norway(Norges Forkningsrad of Norway);Sweden(the Swedish Research Council);the UK(the Natural Environment Research Council)

摘　　要：An ionospheric heating experiment involving an O mode pump wave was carried out at European Incoherent Scatter Scientific Association site in Troms？. The observation of the ultra high frequency radar illustrates the systematic variations of the enhanced ion line and plasma line in altitude and intensity as a function of the pump frequency. The analysis shows that those altitude variations are due to the thermal effect, and the intensity variations of the enhanced ion line are dependent on whether or not the enhanced ion acoustic wave satisfy the Bragg condition of radar. Moreover, a prediction that if the enhancement in electron temperature is suppressed,those systematic variations will be absent, is given.An ionospheric heating experiment involving an O mode pump wave was carried out at European Incoherent Scatter Scientific Association site in Troms？. The observation of the ultra high frequency radar illustrates the systematic variations of the enhanced ion line and plasma line in altitude and intensity as a function of the pump frequency. The analysis shows that those altitude variations are due to the thermal effect, and the intensity variations of the enhanced ion line are dependent on whether or not the enhanced ion acoustic wave satisfy the Bragg condition of radar. Moreover, a prediction that if the enhancement in electron temperature is suppressed,those systematic variations will be absent, is given.

关 键 词：ionospheric heating fifth harmonic parameter instability altitude intensity 

分 类 号：TN958[电子电信—信号与信息处理]