Modification of the high latitude ionosphere F region by X-mode powerful HF radio waves: Experimental results from multi-instrument diagnostics
Modification of the high latitude ionosphere F region by X-mode powerful HF radio waves: Experimental results from multi-instrument diagnostics
复制标题
DOI：
10.1016/j.jastp.2015.10.009
复制
发表时间：
2015-12-01
影响因子：
1.9
通讯作者：
Kalishin, A. S.
中科院分区：
文献类型：
--
作者：
Blagoveshchenskaya, N. F.;Borisova, T. D.;Kalishin, A. S.
我们的实验结果集中在高纬度电离层F2层的各种现象，这些现象是由高加热器频率（f(H) =6.2-8.0 MHz）下的特殊（x模式）高频泵浦波引起的，这取决于泵浦波频率接近普通和特殊模式临界频率foF2和fxF2。实验分别于2012年10月和2013年10 - 11月在有效辐射功率450-650 MW的EISCAT高频加热设施进行。当f(H)/foF2比值在0.9到1.35的范围内变化时，它们的显著特征是临界频率变化的幅度很大。它提供了在不同的f(H)/foF2比下激发的x模hf诱导现象的适当比较，并估计了在foF2以上的频率范围内，这种x模现象仍然是可能的。结果表明，当高频泵浦频率位于foF2与fxF2、fof21和f(H)/foF2之间时，高频增强离子线和等离子体线在foF2以上被激发
We present experimental results concentrating on a variety of phenomena in the high latitude ionosphere F2 layer induced by an extraordinary (X-mode) HF pump wave at high heater frequencies (f(H) =6.2-8.0 MHz), depending on the pump frequency proximity to the ordinary and extraordinary mode critical frequencies, foF2 and fxF2. The experiments were carried out at the EISCAT HF heating facility with an effective radiated power of 450-650 MW in October 2012 and October-November 2013. Their distinctive feature is a wide diapason of critical frequency changes, when the f(H)/foF2 ratio was varied through a wide range from 0.9 to 1.35. It provides both a proper comparison of X-mode HF-induced phenomena excited under different ratios of f(H)/foF2 and an estimation of the frequency range above foF2 in which such X-mode phenomena are still possible. It was shown that the HF-enhanced ion and plasma lines are excited above foF2 when the HF pump frequency is lying in range between the foF2 and fxF2, foF2 1 as well as f(H)/foF2