title: Competition between Langmuir and upper-hybrid turbulence in a high-frequency-pumped ionosphere.
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.
authors.affiliation: Swedish Institute of Space Physics, P.O. Box 537, Uppsala, Sweden. bt@irfu.se
authors.forename: B
authors.initials: B
authors.lastname: Thidé
authors.forename: E N
authors.initials: EN
authors.lastname: Sergeev
authors.forename: S M
authors.initials: SM
authors.lastname: Grach
authors.forename: T B
authors.initials: TB
authors.lastname: Leyser
authors.forename: T D
authors.initials: TD
authors.lastname: Carozzi