College Papers

The interaction of high-power radiowaves with the ionosphere has been and continues to be a vibrant area of research after a number of decades

The interaction of high-power radiowaves with the ionosphere has been and continues to
be a vibrant area of research after a number of decades. A broad spectrum of physical processes
occur during the interaction of high-power high frequency HF radiowaves with the
plasma (e.g. 1). These include increase in electron temperature, creation of large-scale geomagnetic
field-aligned density structures, often referred to as field-aligned irregularities
(FAI), modification of natural current systems in the ionosphere, various forms of plasma
turbulence, generation of energetic electrons that result in airglow (artificial auroras), and
very recently (e.g. 2), creation of artificial ionization layers in the upper atmosphere. This
plethora of processes which cover a broad range of spatial and temporal scales, provide
for diagnostics of the interaction region as well as potential practical applications, particularly
related to communication systems.