Competition between Langmuir and upper-hybrid turbulence in a high-frequency-pumped ionosphere |
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Authors: | Thidé B Sergeev E N Grach S M Leyser T B Carozzi T D |
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Institution: | Swedish Institute of Space Physics, P.O. Box 537, Uppsala, Sweden. bt@irfu.se |
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Abstract: | We show how the secondary escaping radiation, also known as stimulated electromagnetic emission (SEE), from the ionosphere irradiated by a high-intensity radio beam, can be used to study both reflection altitude ponderomotive parametric instabilities and upper-hybrid altitude thermal parametric instabilities. This has allowed us to observe the transfer of energy from smaller to higher sideband frequency offsets and to identify a new transient SEE feature. |
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