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CERN Document Server Znaleziono 11 rekordów  1 - 10następny  skocz do rekordu: Szukanie trwało 0.60 sekund. 
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MLOps - Going from Good to Great / Maciejewski, Michal (speaker)
MLOps - Going from Good to Great To build a highly-performant machine learning model is not a small feat. The process requires a well-curated dataset, a suitable algorithm as well as finely tuned hyperparameters of the very algorithm [...]
2023 - 3110. Inverted CSC; Inverted CERN School of Computing 2023 External links: Talk details; Event details In : Inverted CERN School of Computing 2023
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Machine Learning with a Hybrid Model for Monitoring of the Protection Systems of the LHC / Obermair, Christoph (CERN ; Graz, Tech. U.) ; Apollonio, Andrea (CERN) ; Charifoulline, Zinour (CERN) ; Maciejewski, Michal (CERN) ; Pernkopf, Franz (Graz, Tech. U.) ; Verweij, Arjan (CERN)
The LHC is the world’s largest particle accelerator and uses a complex set of sophisticated and highly reliable machine protection systems to ensure a safe operation with high availability for particle physics production. The data gathered during several years of successful operation allow the use of data-driven methods to assist experts in finding anomalies in the behavior of those protection systems. [...]
Geneva : JACoW, 2021 - 4 p. - Published in : JACoW IPAC 2021 (2021) 1072-1075 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1072-1075
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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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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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Co-Simulation of Transient Effects in Superconducting Accelerator Magnets / Maciejewski, Michal
Numerical modeling of complex physical systems involving several coupled physical domains, so called multi-domain and multi-physics systems, poses considerable challenges w.r.t [...]
CERN-THESIS-2018-421 - 139 p.

Fulltext
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Simulation of a quench event in the upgraded High-Luminosity LHC Main dipole circuit including the 11 T Nb$_{3}$Sn dipole magnets / Fernandez Navarro, Alejandro Manuel (CERN) ; Maciejewski, Michal (CERN) ; Verweij, Arjan P (CERN) ; Bortot, Lorenzo (CERN) ; Mentink, Matthias (CERN) ; Prioli, Marco (CERN) ; Auchmann, Bernhard (PSI, Villigen) ; Izquierdo Bermudez, Susana (CERN) ; Ravaioli, Emmanuele (LBNL, Berkeley) ; Yammine, Samer (CERN)
To achieve the goal of increased luminosity, two out of eight main dipole circuits of the accelerator will be reconfigured in the coming LHC upgrade by replacing one standard 14.3-m long, Nb-Ti-based, 8.3 T dipole magnet by two 5.3-m long, Nb$_{3}$Sn-based, 11.2 T magnets (MBH). The modified dipole circuits will contain 153 Nb-Ti magnets and two MBH magnets. [...]
2018 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4702605
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4702605
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A 2-D Finite-Element Model for Electro-Thermal Transients in Accelerator Magnets / Bortot, Lorenzo (CERN) ; Auchmann, Bernhard (PSI, Villigen ; CERN) ; Garcia, Idoia Cortes (Darmstadt, Tech. U.) ; Fernandez Navarro, Alejandro Manuel (CERN) ; Maciejewski, Michal (CERN) ; Prioli, Marco (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.) ; Verweij, Arjan (CERN)
Superconducting accelerator magnets require sophisticated monitoring and means of protection due to the large energy stored in the magnetic field. Numerical simulations play a crucial role in understanding transient phenomena occurring within the magnet, and can, therefore, help to prevent disruptive consequences. [...]
arXiv:1710.01187.- 2017-09-01 - 1 p. - Published in : IEEE Trans. Magn. 54 (2017) 7000404 Fulltext: arXiv:1710.01187 - PDF; 1710.01187 - PDF;
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Automated lumped-element simulation framework for modelling of transient effects in superconducting magnets / Maciejewski, Michal (CERN) ; Ravaioli, Emmanuele (CERN) ; Auchmann, Bernhard (CERN) ; Verweij, Arjan (CERN) ; Bartoszewicz, Andrzej (Lodz, Tech. U.)
Abstract: The paper describes a flexible, extensible, and user-friendly framework to model electrothermal transients occurring in superconducting magnets. Simulations are a fundamental tool for assessing the performance of a magnet and its protection system against the effects of a sudden transition from the superconducting to the normal state (also known as a quench). [...]
2015
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A Consistent Simulation of Electrothermal Transients in Accelerator Circuits / Bortot, Lorenzo (CERN) ; Maciejewski, Michal (CERN) ; Prioli, Marco (CERN) ; Navarro, Alejando M Fernandez (CERN) ; Ghini, Jonas Blomberg (CERN) ; Auchmann, Bernhard (CERN) ; Verweij, Arjan P (CERN)
Abstract: Transient effects occurring in a superconducting accelerator circuit can be correctly simulated only if the models consistently account for the electrothermodynamic coupling between the magnets, the protection systems, and the remaining network. We present a framework based on the idea of cosimulation. [...]
2017 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4001305
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4001305
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Application of Java Technology to Simulation of Transient Effects in Accelerator Magnets / Maciejewski, Michal (speaker) (Technical University of Lodz(PL))
Superconducting magnets are one of the key building blocks of modern high-energy particle accelerators. Operating at extremely low temperatures (1.9 K), superconducting magnets produce high magnetic field needed to control the trajectory of beams travelling at nearly the speed of light. [...]
2017 - 1023. Conferences; Voxxed Days CERN External links: Talk details; Event details In : Voxxed Days CERN
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17 Maciejewski, M
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