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CERN Document Server 21 records found  1 - 10nextend  jump to record: Search took 0.57 seconds. 
1.
Beam-Based Reconstruction of the Shielded Quench-Heater Fields for the LHC Main Dipoles / Richtmann, Lea (CERN) ; Bortot, Lorenzo (CERN) ; Ravaioli, Emmanuele (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN)
Small orbit oscillations of the circulating particle beams have been observed immediately following quenches in the LHC’s superconducting main dipole magnets. Magnetic fields generated during the discharge into the quench heaters were identified as the cause. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1874-1877 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1874-1877
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2.
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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3.
Simulation of Transient Effects in High-Temperature Superconducting Magnets / Bortot, Lorenzo
Particle colliders for high-energy physics are important tools for investigating the fundamental structure of matter [...]
CERN-THESIS-2021-307 - Online : TUprints, 2022-03-18. - 205 p.

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4.
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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5.
A Coupled A–H Formulation for Magneto-Thermal Transients in High-Temperature Superconducting Magnets / Bortot, Lorenzo (CERN) ; Auchmann, Bernhard (CERN) ; Garcia, Idoia Cortes (Darmstadt, Tech. U.) ; De Gersem, Herbert (Darmstadt, Tech. U.) ; Maciejewski, Michal (CERN) ; Mentink, Matthias (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.) ; Van Nugteren, Jeroen (CERN) ; Verweij, Arjan P. (CERN)
The application of high-temperature superconductors to accelerator magnets for future particle colliders is under study. Numerical methods are crucial for an accurate evaluation of the complex dynamical behavior of the magnets, especially concerning the magnetic field quality and thermal behavior. [...]
arXiv:1909.03312.- 2020-01-27 - 11 p. - Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4900911 Fulltext: PDF;
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6.
LHC MD 3205: Beam Screen Shielding from QH Discharge at 70 K / Wiesner, Christoph (CERN) ; Bortot, Lorenzo (Technische Universitaet Darmstadt (DE)) ; Lindstrom, Bjorn Hans Filip (Uppsala University (SE)) ; Mentink, Matthias (CERN) ; Ravaioli, Emmanuele (CERN) ; Richtmann, Lea Caterina (Universitaet Hannover (DE)) ; Valette, Matthieu ; Wollmann, Daniel (CERN)
This note summarises the results of LHC Machine Development (MD) 3205, performed on October 31st 2018. [...]
CERN-ACC-NOTE-2020-0003. - 2020.
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7.
Conceptual Design of the FCC-hh Dipole Circuits With Integrated CLIQ Protection System / Prioli, Marco (CERN ; INFN, Milan) ; Auchmann, Bernhard (CERN ; PSI, Villigen) ; Bortot, Lorenzo (CERN) ; Maciejewski, Michał (CERN ; Lodz U. Tech. (main)) ; Salmi, Tiina (Tampere U. of Tech.) ; Verweij, Arjan (CERN)
The Future Circular Collider (FCC-hh) project is a conceptual study whose goal is to design the successor of the Large Hadron Collider, increasing the collision energy from 14 to 100 TeV. The energy stored in the 16-T superconducting dipole magnets and the length of the sectors composing the 100-km FCC tunnel are considerably larger than those in present accelerators. [...]
2019 - 9 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4703309 Fulltext: PDF;
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8.
The CLIQ Quench Protection System Applied to the 16 T FCC-hh Dipole Magnets / Prioli, Marco (CERN ; INFN, Milan) ; Salmi, Tiina (Tampere U. of Tech.) ; Auchmann, Bernhard (CERN ; PSI, Villigen) ; Bortot, Lorenzo (CERN) ; Maciejewski, Michal (CERN ; Lodz U. Tech. (main)) ; Verweij, Arjan (CERN) ; Caiffi, Barbara (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Lorin, Clement (Saclay) ; Segreti, Michel (Saclay) et al.
Part of the Future Circular Collider (FCC-hh) study is dedicated to the development of the 16 Tesla ${\rm Nb_3Sn}$superconducting dipole magnets. The design of the magnets was enabled by a cooperative effort of national research institutes, universities, and CERN. [...]
2019 - 9 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4703209 Fulltext: PDF;
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9.
Beam impact experiment of 440 GeV/p protons on superconducting wires and tapes in a cryogenic environment / Will, Andreas (KIT, Karlsruhe ; CERN) ; Bastian, Yan (CERN) ; Bernhard, Axel (KIT, Karlsruhe) ; Bonura, Marco (U. Geneva (main)) ; Bordini, Bernardo (CERN) ; Bortot, Lorenzo (CERN) ; Favre, Mathieu (CERN) ; Lindstrom, Bjorn (CERN) ; Mentink, Matthijs (CERN) ; Monteuuis, Arnaud (CERN) et al.
The superconducting magnets used in high energy particle accelerators such as CERN’s LHC can be impacted by the circulating beam in case of specific failure cases. This leads to interaction of the beam particles with the magnet components, like the superconducting coils, directly or via secondary particle showers. [...]
CERN-ACC-2019-266.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPTS066 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPTS066
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10.
Tests of the FRESCA2 100 mm bore Nb$_3$Sn block-coil magnet to a record field of 14.6 T / Willering, Gerard (CERN) ; Arnestad, Havard (CERN) ; Bajko, Marta (CERN) ; Bajas, Hugo (CERN) ; Bortot, Lorenzo (CERN) ; Bottura, Luca (CERN) ; Bourcey, Nicolas (CERN) ; Duda, Michal (CERN ; Cracow, INP) ; Ferracin, Paolo (CERN) ; Feuvrier, Jerome (CERN) et al.
The Nb$_3$Sn block coil dipole magnet FRESCA2 was developed within the framework of a collaboration between CEA Saclay and CERN, in the continuity of the European project EuCARD and EuCARD2. With an aperture of 100 mm and a target bore field of 13 T at 10.6 kA, the magnet is required for a new FRESCA2 cable test facility at CERN. [...]
2019 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4004906
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