Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs

Abstract : Superconducting cryomagnets are high magnetic fields sources that are both compact and energy efficient. There are various magnetization technics but only the magnetization by pulsed magnetic field (PFM) results in high excitation fields, that otherwise could only be obtained with large superconducting coils.This work was done in the framework of an industrial collaboration. In a first step, a compact and innovative pulse current generator enabling the generation of pulses with a 3000 Amps maximum intensity was designed and fabricated. Secondly, different systems for the magnetization of cryo-magnets either cooled down to 77 K or cooled in a cryostat by a cryo-generator were implemented. Finally, the pulsed field magnetization of superconducting cryo-magnets has shown that reversible and reproducible magnetic field in the one Tesla range could be generated by the set up.The results obtained are consistent with the industrial goals of this study. They are very encouraging for the development of reversible magnetic field devices based on superconducting cryo-magnets and dedicated to scientific instrumentation or for electrotechnical applications.
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Louis Dupont. Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs. Matériaux. Normandie Université, 2018. Français. ⟨NNT : 2018NORMC209⟩. ⟨tel-01842235⟩

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