CERN Accelerating science

CERN Document Server 57 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 0.83 δευτερόλεπτα. 
1.
Validating the Physics-Driven Lumped-Element Model of the LHC Main Dipole Magnet / Janitschke, M (CERN ; U. Rostock) ; Bednarek, M (CERN) ; Ravaioli, E (CERN) ; Verweij, A P (CERN) ; Willering, G (CERN) ; Wozniak, M (CERN) ; van Rienen, U (U. Rostock)
Measuring the complex impedance of a superconducting magnet as a function of frequency provides valuable insight into its electrodynamics. In particular, the characteristic features of some non-conform behaviour, such as an insulation fault, may be easier to assess when performing impedance measurements rather than observing time-domain signals. [...]
2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4004405 Fulltext: PDF;
2.
A Simplified Approach to Simulate Quench Development in a Superconducting Magnet / Janitschke, Marvin (CERN ; Berlin, Tech. U.) ; Mentink, Matthias (CERN) ; Murgia, Federica (CERN ; U. Bologna (main)) ; Pracht, Dimitri (CERN ; QUEST, Hannover) ; Ravaioli, Emmanuele (CERN) ; Verweij, Arjan P (CERN)
Cross-sectional 2D models often represent a computationally efficient alternative to full 3D models, when simulating complex multi-physical magnet systems. However, especially for the case of self-protected, superconducting magnets, where the stored energy has to be dissipated within the magnet coils, the thermal diffusion and the quench development in all three dimensions become key aspects. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000905 Fulltext: PDF;
3.
Quench Protection Studies for the High Luminosity LHC Nb$_3$Sn Quadrupole Magnets / Ravaioli, Emmanuele (CERN) ; Ambrosio, Giorgio (Fermilab) ; Bajas, Hugues (CERN) ; Duda, Michal (PSI, Villigen ; CERN) ; Ferracin, Paolo (LBNL, Berkeley) ; Ferradas Troitino, Jose (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Mangiarotti, Franco (CERN) ; Marinozzi, Vittorio (Fermilab) ; Mentink, Matthias (CERN) et al.
Achieving the targets of the High Luminosity LHC project requires the installation of new inner triplet magnet circuits for the final focusing of the particle beams on each side of the two main interaction points. Each of the four circuits will include six 150 mm aperture, 132.2 T/m gradient, Nb$_3$Sn quadrupole magnets to be installed in the LHC tunnel. [...]
FERMILAB-PUB-21-124-TD.- 2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4700405 Fulltext from Publisher: PDF;
4.
High-temperature superconducting screens for magnetic field-error cancellation in accelerator magnets / Bortot, L. (CERN ; Darmstadt, Tech. U.) ; Mentink, M. (CERN) ; Petrone, C. (CERN) ; Van Nugteren, J. (CERN) ; Deferne, G. (CERN) ; Koettig, T. (CERN) ; Kirby, G. (CERN) ; Pentella, M. (CERN ; Turin Polytechnic) ; Perez, J.C. (CERN) ; Pincot, F.O. (CERN) et al.
Accelerators magnets must have minimal magnetic field imperfections for reducing particle-beam instabilities. In the case of coils made of high-temperature superconducting (HTS) tapes, the field imperfections from persistent currents need to be carefully evaluated. [...]
arXiv:2103.14354.- 2021-08-26 - 11 p. - Published in : Supercond. Sci. Technol. 34 (2021) 105001 Fulltext: PDF;
5.
Analysis of short-circuit transients in the LHC main dipole circuit / Liakopoulou, A (CERN ; Twente U., Enschede) ; Annema, A J (Twente U., Enschede) ; Bortot, L (CERN ; Darmstadt, Tech. U.) ; Charifoulline, Z (CERN) ; Maciejewski, M (CERN) ; Prioli, M (INFN, Milan) ; Ravaioli, E (CERN) ; Salm, C (Twente U., Enschede) ; Schmitz, J (Twente U., Enschede) ; Verweij, A P (CERN)
After the occurrence and detection of a short circuit to ground in the LHC main dipole circuit, a fast power abort is triggered and the current in the circuit starts decaying semi-exponentially from a maximum value of 11.85 kA to zero, with a time constant of 103 s. If a short to ground occurs, the current flows through the fuse that is present in the grounding subcircuit. [...]
IOP, 2020 - 10 p. - Published in : J. Phys.: Conf. Ser. 1559 (2020) 012077 Fulltext: PDF;
In : 14th European Conference on Applied Superconductivity, Glasgow, United Kingdom, 1 - 5 Sep 2019, pp.012077
6.
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;
7.
The 16 T dipole development program for FCC and HE-LHC / Schoerling, Daniel (CERN) ; Arbelaez, Diego (LBNL, Berkeley) ; Auchmann, Bernhard (PSI, Villigen) ; Bajko, Marta (CERN) ; Ballarino, Amalia (CERN) ; Barzi, Emanuela (Fermilab) ; Bellomo, Giovanni (INFN, Milan) ; Benedikt, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Bordini, Bernardo (CERN) et al.
A future circular collider (FCC) with a center-of-mass energy of 100 TeV and a circumference of around 100 km, or an energy upgrade of the LHC (HE-LHC) to 27 TeV require bending magnets providing 16 T in a 50-mm aperture. Several development programs for these magnets, based on Nb$_3$Sn technology, are being pursued in Europe and in the U.S. [...]
FERMILAB-PUB-19-400-TD.- 2019 - 9 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4003109
8.
Quench protection of the 16 T Nb3Sn dipole magnets designed for the Future Circular Collider / Salmi, Tiina (Tampere U. of Tech.) ; Prioli, Marco (CERN) ; Stenvall, Antti (Tampere U. of Tech.) ; Verweij, Arjan P (CERN)
Three different 16 T dipole magnet options for the Future Circular Collider (FCC) have been designed within the H2020 EuroCirCol collaboration, namely a cosθ-, a block-, and a common-coil -type of magnet. All magnets were designed using the same constraints related to magnetic field, cable parameters, mechanics, and quench protection. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4700905
9.
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
10.
STEAM: A Hierarchical Cosimulation Framework for Superconducting Accelerator Magnet Circuits / Bortot, L. (CERN) ; Auchmann, B. (CERN) ; Garcia, I.Cortes (Darmstadt, Tech. U.) ; Fernandez Navarro, A.M. (CERN) ; Maciejewski, M. (CERN) ; Mentink, M. (CERN) ; Prioli, M. (CERN) ; Ravaioli, E. (LBL, Berkeley) ; Schöps, S. (Darmstadt, Tech. U.) ; Verweij, A.P. (CERN)
Simulating the transient effects occurring in superconducting accelerator magnet circuits requires including the mutual electro-thermo-dynamic interaction among the circuit elements, such as power converters,
arXiv:1801.08957.- 2017-12-27 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2017) 4900706
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4900706

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