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CERN Document Server 11 elementer funnet  1 - 10neste  gå til element: Søket tok 0.67 sekunder. 
1.
Coupled Axial and Transverse Currents Method for Finite Element Modelling of Periodic Superconductors / Dular, Julien (CERN) ; Magnus, Fredrik (CERN ; Norwegian U. Sci. Tech.) ; Schnaubelt, Erik (CERN ; Darmstadt, Tech. Hochsch.) ; Verweij, Arjan (CERN) ; Wozniak, Mariusz (CERN)
In this paper, we propose the Coupled Axial and Transverse currents (I) (CATI) method, as an efficient and accurate finite element approach for modelling the electric and magnetic behavior of periodic composite superconducting conductors. The method consists of a pair of two-dimensional models coupled via circuit equations to account for the conductor geometrical periodicity. [...]
arXiv:2404.09775.- 2024-07-29 - 18 p. - Published in : Supercond. Sci. Technol. 37 (2024) 095002 Fulltext: 2404.09775 - PDF; document - PDF;
2.
Parallel-in-Time Integration of Transient Phenomena in No-Insulation Superconducting Coils Using Parareal / Schnaubelt, Erik (CERN ; Darmstadt, Tech. U.) ; Wozniak, Mariusz (CERN) ; Dular, Julien (CERN) ; Cortes Garcia, Idoia (Eindhoven, Tech. U.) ; Verweij, Arjan (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.)
High-temperature superconductors (HTS) have the potential to enable magnetic fields beyond the current limits of low-temperature superconductors in applications like accelerator magnets. [...]
arXiv:2404.13333.
- 9 p.
Fulltext
3.
An open-source 3D FE quench simulation tool for no-insulation HTS pancake coils / Atalay, Sina (CERN ; Bogazici U.) ; Schnaubelt, Erik (CERN ; Darmstadt, Tech. Hochsch.) ; Wozniak, Mariusz (CERN) ; Dular, Julien (CERN) ; Zachou, Georgia (CERN ; Natl. Tech. U., Athens) ; Schöps, Sebastian (Darmstadt, Tech. Hochsch.) ; Verweij, Arjan (CERN)
A new module, Pancake3D, of the open-source Finite Element Quench Simulator (FiQuS) has been developed in order to perform transient simulations of no-insulation (NI) high-temperature superconducting (HTS) pancake coils in 3-dimensions. FiQuS/Pancake3D can perform magnetodynamic or coupled magneto-thermal simulations. [...]
arXiv:2311.09177.- 2024-05-08 - 11 p. - Published in : Supercond. Sci. Technol. 37 (2024) 065005 Fulltext: Publication - PDF; 2311.09177 - PDF;
4.
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
5.
Efficient Reduced Magnetic Vector Potential Formulation for the Magnetic Field Simulation of Accelerator Magnets / D'Angelo, Laura A.M. (Darmstadt, Tech. U.) ; Moll, Dominik (Darmstadt, Tech. U.) ; Vitrano, Andrea (CERN) ; Marsic, Nicolas (Darmstadt, Tech. U.) ; Schnaubelt, Erik (Darmstadt, Tech. U. ; CERN) ; Wozniak, Mariusz (CERN) ; De Gersem, Herbert (Darmstadt, Tech. U.) ; Auchmann, Bernhard (PSI, Villigen)
The major advantage of reduced magnetic vector potential formulations (RMVPs) is that complicated coil structures do not need to be resolved by a computational mesh. Instead, they are modeled by thin wires, whose source field is included into the simulation model along Biot-Savart's law. [...]
arXiv:2309.02004.- 2024-03 - 8 p. - Published in : IEEE Trans. Magn. 60 (2024) 7000808 Fulltext: PDF;
6.
Quench Co-Simulation of Canted Cos-Theta Magnets / Wozniak, Mariusz (CERN) ; Schnaubelt, Erik (CERN ; Darmstadt, Tech. U.) ; Dular, Julien (CERN) ; Ravaioli, Emmanuele (CERN) ; Verweij, Arjan (CERN)
Canted Cos-Theta (CCT) magnets can use conducting formers in which eddy currents are induced during current change. This is relevant during magnet ramping or discharging after a quench, particularly when using energy extraction. [...]
2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4900105
7.
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
8.
An Open-Source Finite Element Quench Simulation Tool for Superconducting Magnets / Vitrano, Andrea (CERN) ; Wozniak, Mariusz (CERN) ; Schnaubelt, Erik (CERN ; Darmstadt, Tech. Hochsch.) ; Mulder, Tim (CERN) ; Ravaioli, Emmanuele (CERN) ; Verweij, Arjan (CERN)
An open-source Finite Element Quench Simulator (FiQuS) is being developed as part of the STEAM framework following CERN's open science policy (CERN, 2022). The tool is based solely on open-source software and uses Python to generate geometries and meshes with Gmsh and compute solutions with GetDP. [...]
2023 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4702006 Fulltext: PDF;
9.
External Coil Coupled Loss Induced Quench (E-CLIQ) System for the Protection of LTS Magnets / Mulder, Tim (CERN) ; Bordini, Bernardo (CERN) ; Ravaioli, Emmanuele (CERN) ; Schnaubelt, Erik (CERN ; Darmstadt, Tech. Hochsch.) ; Wozniak, Mariusz (CERN) ; Verweij, Arjan (CERN)
The next generation of Nb 3 Sn accelerator magnets are pushed to higher magnetic fields, higher stored energy and higher energy density. This brings additional challenges when it comes to quench protection. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4702105 Fulltext: PDF;
10.
Electromagnetic Simulation of No-Insulation Coils Using H – ϕ Thin Shell Approximation / Schnaubelt, Erik (CERN ; Darmstadt, Tech. U.) ; Wozniak, Mariusz (CERN) ; Schöps, Sebastian (Darmstadt, Tech. Hochsch.) ; Verweij, Arjan (CERN)
When simulating no-insulation high-temperature superconducting pancake coils with the finite element (FE) method, the high aspect ratio of the thin turn-to-turn contact layer (T2TCL) leads to unfavorable meshes in these thin layers as manifested by a high number of degrees of freedom (DoF) or mesh elements of poor quality which decrease the accuracy of the simulation results. To mitigate this issue, we propose to collapse the T2TCL volume into a surface using a thin shell approximation (TSA) for three-dimensional FE analysis. [...]
2023 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4900906 Fulltext: PDF;

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