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Théorie de la microgravité magnétique. Conception, dimensionnement et contrôle d'environnement microgravitationnel

Abstract : The thesis deals with magnetic gravity compensation. First of all magnetic levitation experiments are explained with the help of a magneto-gravitational potential SL. Next, a general analysis method of the magnetic force is developed which employs magnetic field harmonics. The method underlines both the significance and role of the first three magnetic field harmonics on the resulting forces inherent in magnetic gravity compensation. In cylindrical geometry with translational invariance various combination of magnetic, gravitational and centrifugal forces open new possibilities for the magnetic levitation. A suitable combination of both magnetic and centrifugal forces allows exactly compensating gravity on diamagnetic materials. In axisymmetric geometry with rotational invariance designs of feasible oxygen magnetic levitation stations are introduced (NbTi@4,2K). Levitation of oxygen volumes more than one litre with inhomogeneities less than 1% can be accomplished within these magnetic levitation facilities. The constitution of the stations makes possible both spatial and temporal variations of the resulting acceleration configurations. At last the dynamic magnetic compensation of gravity with a real coil system is studied so as to simulate both acceleration and deceleration of spaceships
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Submitted on : Thursday, March 29, 2018 - 11:46:34 AM
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Clément Lorin. Théorie de la microgravité magnétique. Conception, dimensionnement et contrôle d'environnement microgravitationnel. Autre. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL065N⟩. ⟨tel-01748699⟩



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