Comparative study between in-situ measurements and a 3D efficient model for the computation of magnetic fields in High Field Polyhelix magnets

Autor: Daversin, Cécile, Debray, Francois, Dumas, Jean, Hild, Romain, Prud'Homme, Christophe, Sala, Philippe, Trophime, Christophe
Přispěvatelé: Hild, Romain, Modèles Numériques - Common Horizon of Open Research in Uncertainty for Simulation - - CHORUS2013 - ANR-13-MONU-0005 - MN - VALID, Institut de Recherche Mathématique Avancée (IRMA), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des champs magnétiques intenses (LCMI-GHMFL), Centre National de la Recherche Scientifique (CNRS), Science et Ingénierie des Matériaux et Procédés (SIMaP ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), ANR-13-MONU-0005,CHORUS,Common Horizon of Open Research in Uncertainty for Simulation(2013)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Maxwell
3D effect
Biot & Savart
[PHYS.MPHY]Physics [physics]/Mathematical Physics [math-ph]
[MATH.MATH-OC] Mathematics [math]/Optimization and Control [math.OC]
[PHYS.COND.CM-S] Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
[PHYS.MPHY] Physics [physics]/Mathematical Physics [math-ph]
[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Magnet
PolyHelix
Validation
[INFO.INFO-DC] Computer Science [cs]/Distributed
Parallel
and Cluster Computing [cs.DC]
[MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP]
[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC]
[INFO.INFO-MO] Computer Science [cs]/Modeling and Simulation
[INFO.INFO-DC]Computer Science [cs]/Distributed
Parallel
and Cluster Computing [cs.DC]
[MATH.MATH-AP] Mathematics [math]/Analysis of PDEs [math.AP]
Zdroj: 25th International Conference on Magnet Technology (MT25)
25th International Conference on Magnet Technology (MT25), Aug 2017, Amsterdam, Netherlands
Popis: International audience; The Laboratoire National des Champs Magnétiques Intenses (LNCMI) is a member of the European Magnetic Field Laboratory (EMFL). This is the French facility enabling researchers to perform experiments in the highest possible magnetic fields. The numerical modeling jointly developed with the Center of Modeling and Simulation of Strasbourg (Cemosis) plays an essential role in the understanding and the optimization of such magnets based on the so-called polyhelix technique (a magnet is a set of Copper alloy tubes cut by Electrical Discharge Machining). In the context of this collaboration, a full 3D multi-physics model dedicated to the study of LNCMI resistive high field magnets has been implemented. Applications of this model have shown a 3D behaviour of the magnetic field, specifically in the vicinity of the beginnings and ends of the helical cuts. The effect is greater than what is commonly expected by experts. To validate our model and this unexpected behaviour, dedicated measurement campaigns were carried out both on a real magnet insert and on a low field test bench. In this paper, we will describe the in-situ and low field testbench setups used to perform a 3D mapping of the magnetic field. We will briefly detail the ingredients of our numerical model, especially the parallel algorithm proposed to apply efficiently the Biot and Savart’s law for computing the magnetic field produced by magnet inserts and seen by the researchers. Finally we will present the comparative study based on calculations and measurements that confirm the 3D distribution of the magnetic field and therefore validate to some extent our modeling choices. The periodic variations observed are related to the helical cut of the Polyhelix magnets. This study is an important step in the understanding of Polyhelix magnets behaviour.
Databáze: OpenAIRE
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