title: Experimental investigation of non-linear wave to plasma interaction in a quasi-flat magnetostatic field.
abstract: A characterization of wave-to-plasma interaction in a quasi-flat magnetostatic field at 3.75 GHz has been carried out by using a small-wire movable RF antenna, connected to a spectrum analyzer. The coupling between electromagnetic and electrostatic waves leads to a characteristic spectral emission in low frequency range and around the pumping wave frequency. The most relevant results consist in the broadening of the pumping wave spectrum above critical RF power thresholds and in the generation of sidebands of the pumping frequency, with corresponding components in low frequency domain. The non-linearities are accompanied by the generation of overdense plasmas and intense fluxes of X-rays.
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Castro
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Mascali
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Agnello
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Celona
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: O
authors.initials: O
authors.lastname: Leonardi
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Neri
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Nicolosi
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Torrisi
authors.affiliation: INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Gammino