Conception d'un aimant vectoriel supraconducteur produisant 3 T dans une sphère de diamètre 100 mm

Abstract : The LTS superconductor coils are designed to produce strong magnetic fields at the working temperature of liquid Helium. Some kinds of them have been created to produce strong and homogeneous magnetic fields (MRI). Furthermore, the critical and mechanical parameters of superconducting material limit the performances of the coils. Most of the time, the LTS coils are also build to produce a homogeneous magnetic flux density in one single direction |B|=|Bx|. Consequently, it is necessary to rotate the subject or the sample, if we want to make a study depending of the magnetic field orientation. This cannot be suitable for special kinds of experiments or biomedical applications where the subject would need to be rotated. To find an answer to this problem we have designed a coil setup that will satisfy these requirements. Hence, we are working on orientation along 3 axes of a strong magnetic flux density. The design has been made using a 3-D electromagnetic software in order to calculate the performances of the coils system, to optimize the homogeneity and to find a cost effective solution. The first results reported are for a three Helmholtz coils system where each axis is placed following the Cartesian coordinates: x, y, z. This system is designed for 3 T of magnetic flux density at the center of the coils and a peak value on the coils around 7.9 T, for an operating current of 110 A in each coil.
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Submitted on : Monday, July 6, 2015 - 3:09:36 PM
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Rafael-Antonio Linares-Lamus, Kévin Berger, Melika Hinaje, Bruno Douine, Jean Lévêque. Conception d'un aimant vectoriel supraconducteur produisant 3 T dans une sphère de diamètre 100 mm. Jeunes Chercheurs en Génie Électrique (JCGE'2015), Jun 2015, Cherbourg, France. p. 5, 8 p. ⟨hal-01171212⟩

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