Caractérisation électromagnétique de matériaux non usinables. Application a l'étude d'éclats de météorites

• Main Authors: Demontoux, François, Bonnaudin, Fabrice, Duffour, Clément, Ruffié, Gilles, Mora, P., Beaudin, Gérard, Encrenaz, P., Gulkis, S.
• Other Authors: Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Archeovision CNRS, Université de Bordeaux (UB)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH)
• Format: Conference Object
• Language: French
• Published: HAL CCSD 2010
• Subjects: permittivity measurement; meteoritic samples; numerical model; [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism; [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]; [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]; [SDE.MCG]Environmental Sciences/Global Changes; Antarc*; Antarctica
• Online Access: https://hal.science/hal-00509350

National audience Radiometric measurements in microwave frequency range and submillimeter have been performed on an asteroid, S. Gulkis (JPL) and the team MIRO (Microwave Instrument on the orbiter of the spacecraft Rosetta comet), will study the physicochemical characteristics of this asteroid. However, this requires a good understanding of the complex dielectric constant of these objects. It could be specified by microwave measurements in laboratory. The team recently received meteoritic samples (Antarctica), whose composition is similar to that of an asteroid crossed by "Rosetta" in September 2008. Dielectric measurements are performed by the team CEMT (electromagnetic characterization and Remote Sensing) IMS Laboratory (UMR 5218). The samples of meteorites are very rare and can not be machined. A measurement method has been developed at IMS laboratory. The work that we describe in this paper deal with a new measurement method using a resonant cavity that we apply at L and S band. It allows measurements on samples of any shape wich can have a high permittivity.