CERN Accelerating science

CERN Document Server 15 ჩანაწერია ნაპოვნი  1 - 10შემდეგი  ჩანაწერთან გადასვლა: ძიებას დასჭირდა 0.56 წამი. 
1.
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
2.
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;
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
4.
Combination of Measurement Data and Domain Knowledge for Simulation of Halbach Arrays With Bayesian Inference / Fleig, Luisa (CERN ; Darmstadt, Tech. U.) ; Liebsch, Melvin (CERN) ; Russenschuck, Stephan (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.)
Accelerator magnets made from blocks of permanent magnets in a zero-clearance configuration are known as Halbach arrays. The objective of this work is the fusion of knowledge from different measurement sources (material and field) and domain knowledge (magnetostatics) to obtain an updated magnet model of a Halbach array. [...]
arXiv:2306.12844.- 2024-03 - 4 p. - Published in : IEEE Trans. Magn. 60 (2024) 7200104 Fulltext: 2306.12844 - PDF; document - PDF;
5.
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
6.
Electromagnetic Simulation of No-Insulation Coils Using H – $\phi$ 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;
7.
Thermal thin shell approximation towards finite element quench simulation / Schnaubelt, Erik (CERN ; Darmstadt, Tech. U.) ; Wozniak, Mariusz (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.)
Superconducting electromagnets commonly exhibit thin layers with high aspect ratio such as insulation layers or turn-to-turn contacts. A finite element (FE) analysis of these devices can lead to unfavorable meshes in these thin layers, either because of a high number of degrees of freedom or mesh elements of poor quality which decrease the accuracy of the simulation results. [...]
2023 - 12 p. - Published in : Supercond. Sci. Technol. 36 (2023) 044004 Fulltext: PDF;
8.
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;
9.
Local field reconstruction from rotating coil measurements in particle accelerator magnets / Ion, Ion Gabriel (Darmstadt, Tech. U.) ; Liebsch, Melvin (CERN) ; Simona, Abele (Darmstadt, Tech. U. ; Milan, Polytech.) ; Loukrezis, Dimitrios (Darmstadt, Tech. U.) ; Petrone, Carlo (CERN) ; Russenschuck, Stephan (CERN) ; De Gersem, Herbert (Darmstadt, Tech. U.) ; Schöps, Sebastian (Darmstadt, Tech. U.)
In this paper a general approach to reconstruct three dimensional field solutions in particle accelerator magnets from distributed magnetic measurements is presented. To exploit the locality of the measurement operation a special discretization of the Laplace equation is used. [...]
arXiv:2106.15168.- 2021-09-21 - Published in : Nucl. Instrum. Methods Phys. Res., A 1011 (2021) 165580 Fulltext: PDF;
10.
Numerical Analysis of the Screening Current-Induced Magnetic Field in the HTS Insert Dipole Magnet Feather-M2.1-2 / Bortot, Lorenzo (CERN ; Darmstadt, Tech. U.) ; Mentink, Matthias (CERN) ; Petrone, Carlo (CERN) ; Van Nugteren, Jeroen (CERN) ; Kirby, Glyn (CERN) ; Pentella, Mariano (CERN ; Polytech. Turin) ; Verweij, Arjan (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.)
Screening currents are field-induced dynamic phenomena which occur in superconducting materials, leading to persistent magnetization. Such currents are of importance in ReBCO tapes, where the large size of the superconducting filaments gives rise to strong magnetization phenomena. [...]
arXiv:2005.09467.- 2020-10-30 - 14 p. - Published in : Supercond. Sci. Technol. 33 (2020) 125008 Fulltext: PDF; Fulltext from publisher: PDF;

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