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Application of the Universal Quench Detection System to the Protection of the High-Luminosity LHC Magnets at CERN
/ Steckert, Jens (CERN) ; Denz, Reiner (CERN) ; Mundra, Surbhi (CERN) ; Podzorny, Tomasz (CERN) ; Spasic, Jelena (CERN) ; Vancea, Dragos-Gabriel (CERN)
The Universal Quench Detection System (UQDS) has been primarily developed to detect quenches in various superconducting magnets of LHC’s High Luminosity upgrade (HL-LHC). The functionality of the system, which comprises insulated high-resolution digitizing front-end channels and a central processing element, is mainly defined by the configuration of the central FPGA (Field Programmable Gate Array). [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4006305
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4006305
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Development of a Digital Quench Detection System for Nb$_3$Sn Magnets and First Measurements on Prototype Magnets
/ Steckert, Josef (CERN) ; Kopal, Josef (CERN) ; Bajas, Hugues (CERN) ; Denz, Reiner (CERN) ; Georgakakis, Spyridon (CERN) ; De Matteis, Ernesto (CERN) ; Spasic, Jelena (CERN) ; Siemko, Andrzej (CERN)
The High Luminosity upgrade for the Large Hadron Collider LHC (HL-LHC) requires new Nb$_3$Sn superconducting magnets and it triggers a development of novel hardware for the quench detection system (QDS) based on a field programmable gate array (FPGA) digital platform and a number of individually isolated analogue front-ends. Galvanic insulation has been implemented downstream the analogue to digital convertors to eliminate a usage of analogue isolation amplifiers. [...]
2018 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4703304
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4703304
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A Radiation-Tolerant 25.6-Gb/s High-Speed Transmitter in 28-nm CMOS With a Tolerance of 1 Grad
/ Klekotko, A (CERN ; Leuven U.) ; Biereigel, S (CERN) ; Baszczyk, M (CERN) ; Moreira, P (CERN) ; Martina, F (CERN) ; Prinzie, J (Leuven U.) ; Kulis, S (Leuven U.)
This article presents a 25.6-Gbit $\cdot $ s−1 high-speed transmitter (HST) manufactured using 28-nm CMOS technology. The HST macroblock includes an all-digital phase-locked loop (ADPLL), duty cycle corrector (DCC) circuit, data pattern generator, serializer, and a driver capable of driving the differential 100- $\Omega $ line as well as a silicon photonics (SiPh) ring modulator (RM). [...]
2024 - 9 p.
- Published in : IEEE Trans. Nucl. Sci. 71 (2024) 2124-2132
Fulltext: PDF;
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Interpretable Anomaly Detection in the LHC Main Dipole Circuits With Nonnegative Matrix Factorization
/ Obermair, Christoph (CERN ; Graz, Tech. U.) ; Apollonio, Andrea (CERN) ; Charifoulline, Zinour (CERN) ; Felsberger, Lukas (CERN) ; Janitschke, Marvin (CERN ; U. Rostock) ; Pernkopf, Franz (Graz, Tech. U.) ; Ravaioli, Emmanuele (CERN) ; Verweij, Arjan (CERN) ; Wollmann, Daniel (CERN) ; Wozniak, Mariusz (CERN)
CERN's Large Hadron Collider (LHC), with its eight superconducting main dipole circuits, has been in operation for over a decade. During this time, relevant operational parameters of the circuits, including circuit current, voltages across magnets and their coils, and current to ground, have been recorded. [...]
2024 - 12 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4004112
Fulltext: PDF;
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Modeling Results of the Quench Behavior of a Nb-Ti Canted-Cosine-Theta Corrector Magnet for LHC
/ Bagni, T (Uppsala U.) ; Ahl, A (Scanditronix Instrument, Uppsala) ; Almström, M (Linnaeus U.) ; Canale, M (CERN) ; Dugic, I (Linnaeus U.) ; Emilsson, F (AMACC, Uppsala) ; Gentini, L (CERN) ; Haralanova, V (Linnaeus U.) ; Johansson, M (Unlisted, SE) ; Karlsson, G (Linnaeus U.) et al.
A newly designed superconducting magnet of the Canted-Cosine-Theta (CCT) type was developed as a result of a collaboration between Swedish universities (Uppsala and Linneaus) and Swedish industries. This magnet was designed to function as a replacement of the present LHC orbit corrector magnets, which are approaching their end of life due to the radiation load. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4001105
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Development of an ADC Radiation Tolerance Characterization System for the Upgrade of the ATLAS LAr Calorimeter
/ Liu, Hongbin (CUST, SKLPDE ; Brookhaven) ; Chen, Hucheng (Brookhaven) ; Chen, Kai (Brookhaven) ; Kierstead, James (Brookhaven) ; Lanni, Francesco (Brookhaven) ; Takai, Helio (Brookhaven) ; Jin, Ge (CUST, SKLPDE)
ATLAS LAr calorimeter will perform its Phase-I upgrade during the long shut down (LS2) in 2018, a new LAr Trigger Digitizer Board (LTDB) will be designed and installed. Several commercial-off-the-shelf (COTS) multichannel high-speed ADCs have been selected as possible backups of the radiation tolerant ADC ASICs for LTDB. [...]
arXiv:1603.08580.-
2017-02-20 - 8 p.
- Published in : Chin. Phys. C 41 (2016) 026101
Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint
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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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An Enhanced Quench Detection System for Main Quadrupole Magnets in the Large Hadron Collider
/ Spasic, Jelena (CERN) ; Calcoen, Daniel (CERN) ; Denz, Reiner (CERN) ; Froidbise, Vincent (CERN) ; Georgakakis, Spyridon (CERN) ; Podzorny, Tomasz (CERN) ; Siemko, Andrzej (CERN) ; Steckert, Jens (CERN)
To further improve the performance and reliability of the quench detection system (QDS) for main quadrupole magnets in the Large Hadron Collider (LHC), there is a planned upgrade of the system during the long shutdown period of the LHC in 2019-2020. While improving the already existing functionalities of quench detection for quadrupole magnets and field-bus data acquisition, the enhanced QDS will incorporate new functionalities to strengthen and improve the system operation and maintenance. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-WEPAF081
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPAF081
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