Search results for "Microwaves"

showing 2 items of 92 documents

Détection des ruptures de fibres et du délaminage dans les composites verre/époxy et carbone/époxy à l'aide de structures propagatives dans la gamme …

2009

National audience; On présente dans cet article la détection de ruptures de fibre et du délaminage dans les composites unidirectionnels verre/époxy et carbone/époxy en utilisant des structures propagatives électromagnétiques dans la gamme des micro-ondes.

micro-ondes[ SPI.MECA ] Engineering Sciences [physics]/Mechanics [physics.med-ph]détection d'endommagement[ SPI.MAT ] Engineering Sciences [physics]/Materials[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph][SPI.MAT] Engineering Sciences [physics]/Materials[SPI.MECA] Engineering Sciences [physics]/Mechanics [physics.med-ph]compositesmicrowaves[SPI.MAT]Engineering Sciences [physics]/Materialsdamage detectiondielectric caracterisationméthodes expérimentalescaractérisation diélectriqueexperimental method
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Trapped Ion Oscillation Frequencies as Sensors for Spectroscopy

2010

The oscillation frequencies of charged particles in a Penning trap can serve as sensors for spectroscopy when additional field components are introduced to the magnetic and electric fields used for confinement. The presence of so-called "magnetic bottles" and specific electric anharmonicities creates calculable energy-dependences of the oscillation frequencies in the radiofrequency domain which may be used to detect the absorption or emission of photons both in the microwave and optical frequency domains. The precise electronic measurement of these oscillation frequencies therefore represents an optical sensor for spectroscopy. We discuss possible applications for precision laser and microw…

spectroscopyPhotonmagnetic momentlcsh:Chemical technologyBiochemistryArticleAnalytical ChemistryElectromagnetic FieldsElectric fieldmagnetic bottlelcsh:TP1-1185Electrical and Electronic EngineeringMicrowavesSpectroscopyInstrumentationIonsOscillationChemistryLasersSpectrum Analysispenning trapPenning trapAtomic and Molecular Physics and OpticsIon trapRotational spectroscopyAtomic physicsMicrowaveSensors
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