DOI: 10.1029/2018JA025530
Scopus记录号: 2-s2.0-85050312929
论文题名: Excitation of Plasma Irregularities in the F Region of the Ionosphere by Powerful HF Radio Waves of X-Polarization
作者: Borisov N. ; Honary F. ; Li H.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 6 起始页码: 5246
结束页码: 5260
语种: 英语
英文关键词: ionospheric modification
; irregularities
; plasma instabilities
英文摘要: We discuss theoretically the excitation of artificial plasma irregularities in the auroral ionosphere by high-frequency X-mode radio wave. This is done via a two-step process. As a first step we adopt the thermal self-focusing instability excited in the F region of the ionosphere under the action of a strong high-frequency (HF) radio wave. This instability causes the formation of perturbations of the electron temperature and plasma concentration across the magnetic field. In addition, the plasma becomes depleted in the regions of the electron temperature enhancements and vice versa, since the gradients of plasma concentration and the electron temperature have opposite signs. In such conditions the temperature gradient instability comes into play. As a second step we consider plasma and electron temperature inhomogeneities that appear due to this instability to be responsible for the generation of irregularities with transverse sizes smaller than the typical scales of the self-focusing instability. Alternative mechanisms such as excitation of the gradient-drift and the current-convective instabilities, which are often attributed to the generation of plasma irregularities in the F region and can contribute to the formation of artificial irregularities in the case of X-mode heating, are also discussed. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113764
Appears in Collections: 气候减缓与适应
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作者单位: IZMIRAN, Moscow, Russian Federation; Department of Physics, Lancaster University, Lancaster, United Kingdom; School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China
Recommended Citation:
Borisov N.,Honary F.,Li H.. Excitation of Plasma Irregularities in the F Region of the Ionosphere by Powerful HF Radio Waves of X-Polarization[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)