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CERN Document Server Pronađeno je 7 zapisa  Pretraživanje je potrajalo 0.58 sekundi 
1.
Enhancing the magnetic field gradient between two superconductors with rotational motion under a background DC field / Houbart, M (Liege U.) ; Fagnard, J-F (Liege U.) ; Harmeling, P (Liege U.) ; Dular, J (CERN) ; Dennis, A R (Cambridge U.) ; Namburi, D K (Glasgow U.) ; Durrell, J H (Cambridge U.) ; Geuzaine, C (Liege U.) ; Vanderheyden, B (Liege U.) ; Vanderbemden, P (Liege U.)
The ability of bulk high-temperature superconductors to trap magnetic flux densities up to one order of magnitude larger than the saturation magnetization of conventional ferromagnetic materials offers the prospect of generating large magnetic flux density gradients. Combining multiple superconductors, akin to assembling a Halbach array of permanent magnets, may increase the generated gradient even further. [...]
2024 - 16 p. - Published in : Supercond. Sci. Technol. 37 (2024) 095009
Detaljnije - Slični zapisi
2.
Helicoidal Transformation Method for Finite Element Models of Twisted Superconductors / Dular, Julien (CERN) ; Henrotte, François (Liege U.) ; Nicolet, André (Aix-Marseille U.) ; Wozniak, Mariusz (CERN) ; Vanderheyden, Benoît (Liege U.) ; Geuzaine, Christophe (Liege U.)
This article deals with the modeling of superconducting and resistive wires with a helicoidal symmetry, subjected to an external field and a transport current. Helicoidal structures are 3-D, and therefore yield computationally intensive simulations in a Cartesian coordinate system. [...]
2024 - 15 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 8200615 Fulltext: PDF;
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3.
Mortar Thin Shell Approximation for Analysis of Superconducting Accelerator Magnets / Hahn, Robert (Darmstadt, Tech. U.) ; Schnaubelt, Erik (Darmstadt, Tech. U. ; CERN) ; Wozniak, Mariusz (CERN) ; Geuzaine, Christophe (Liege U.) ; Schöps, Sebastian (Darmstadt, Tech. U.)
Thin layers can lead to unfavorable meshes in a finite element (FE) analysis. [...]
arXiv:2405.01076. - 9.
Fulltext
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4.
Magneto-Thermal Thin Shell Approximation for 3D Finite Element Analysis of No-Insulation Coils / Schnaubelt, Erik (CERN ; Darmstadt, Tech. U.) ; Atalay, Sina (CERN ; Bogazici U.) ; Wozniak, Mariusz (CERN) ; Dular, Julien (CERN) ; Geuzaine, Christophe (Liege U.) ; Vanderheyden, Benoît (Liege U.) ; Marsic, Nicolas (Darmstadt, Tech. U.) ; Verweij, Arjan (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.)
For finite element (FE) analysis of no-insulation (NI) high-temperature superconducting (HTS) pancake coils, the high aspect ratio of the turn-to-turn contact layer (T2TCL) leads to meshing difficulties which result in either poor quality mesh elements resulting in a decrease of the solution accuracy or a high number of degrees of freedom. We proposed to mitigate this issue by collapsing the T2TCL volume into a surface and using a so-called thin shell approximation (TSA). [...]
arXiv:2310.03138.- 2024-05 - 6 p. - Published in : 10.1109/TASC.2023.3340648 Fulltext: PDF;
In : 16th European Conference on Applied Superconductivity (EUCAS 2023), Bologna, Italy, 3 - 7 Sep 2023
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5.
How to overcome the demagnetization of superconducting Halbach arrays? / Houbart, M (Liege U.) ; Fagnard, J-F (Liege U.) ; Dular, J (CERN) ; Dennis, A R (Cambridge U.) ; Namburi, D K (Glasgow U.) ; Durrell, J H (Cambridge U.) ; Geuzaine, C (Liege U.) ; Vanderheyden, B (Liege U.) ; Vanderbemden, P (Liege U.)
Assembling trapped-field superconducting magnets with mutually orthogonal magnetizations directions in a Halbach array configuration offers the prospect of generating both high fields and large field gradients. A major issue when assembling bulk superconductors in a Halbach array, however, consists in the alteration of the initial current density distribution during the assembly process. [...]
2023 - 12 p. - Published in : Supercond. Sci. Technol. 36 (2023) 115012
Detaljnije - Slični zapisi
6.
Finite Element Models for Magnetic Shields Made of Stacked Superconducting Tape Annuli / Dular, Julien (CERN) ; Brialmont, Sébastien (Liege U.) ; Vanderbemden, Philippe (Liege U.) ; Geuzaine, Christophe (Liege U.) ; Vanderheyden, Benoît (Liege U.)
Stacks of high-temperature superconducting tape annuli can be used as magnetic shields operating efficiently for both axial and transverse fields. However, due to their layered geometry and hybrid electrical and magnetic properties, implementing models of such structures is not straightforward. [...]
arXiv:2309.15623.- 2024 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4903507 Fulltext: PDF;
Detaljnije - Slični zapisi
7.
On the Stability of Mixed Finite-Element Formulations for High-Temperature Superconductors / Dular, Julien (Liege U.) ; Harutyunyan, Mane (Darmstadt, Tech. U.) ; Bortot, Lorenzo (Darmstadt, Tech. U. ; CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.) ; Vanderheyden, Benoit (Liege U.) ; Geuzaine, Christophe (Liege U.)
In this work, we present and analyze the numerical stability of two coupled finite element formulations. The first one is the h-a-formulation and is well suited for modeling systems with superconductors and ferromagnetic materials. [...]
arXiv:2106.00313.- 2021-07-26 - 12 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 8200412 Fulltext: PDF;
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