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1.
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Continuous Diagnostics for Powered Superconducting Circuits
/ Podzorny, T (CERN) ; Bednarek, M J (CERN) ; Christensen, M B B (CERN ; Aalborg U.) ; Calcoen, D (CERN) ; Denz, R (CERN) ; Ludwin, J (Cracow, INP) ; Steckert, J (CERN) ; Uythoven, J (CERN)
Monitoring the electrical properties of superconducting devices in their unpowered state has proven essential for commissioning and fault diagnosis during LHC machine operation. Furthermore, continuous diagnostics of powered superconducting circuits in an operational or test environment has the potential to further improve the understanding of existing and possibly ageing facilities. [...]
2025 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 35 (2025) 4700105
Fulltext: PDF;
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2.
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Chapter 12: Machine Protection in the High Luminosity LHC
/ Apollonio, A ; Bélanger, P (CERN) ; Carrillo, D (CERN) ; Denz, R (CERN) ; Mateos, F Rodriguez (CERN) ; Panev, B (CERN) ; Siemko, A (CERN) ; Uythoven, J (CERN) ; Verweij, A (CERN) ; Wollmann, D (CERN) et al.
In the high luminosity era of the LHC, the energy stored in the two beams will nearly double as compared with the design value of the current LHC and the beta functions will significantly increase in critical locations. In addition, novel equipment like Nb3Sn based superconducting magnets, crab cavities, hollow e-lenses and others will be installed. [...]
2024 - 19 p.
- Published in : Adv. Ser. Direct. High Energy Phys. 31 (2024) 297-315
Fulltext: PDF;
In : The High Luminosity Large Hadron Collider, pp.297-315
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3.
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Enabling Real-Time Impedance Measurements of Operational Superconducting Circuits of Accelerator Magnets
/ Christensen, M B B (CERN ; Aalborg U.) ; Bednarek, M J (CERN) ; Denz, R (CERN) ; Koch, P (CERN) ; Ludwin, J (CERN ; Cracow, INP) ; Rodriguez-Mateos, F (CERN) ; Podzorny, T (CERN) ; Ravaioli, E (CERN) ; Steckert, J (CERN) ; Verweij, A (CERN) et al.
Impedance measurements of superconducting circuits routinely serve as means to anticipate their dynamic response and validate their electrical integrity. Usual procedures involve performing tests on non-powered systems during commissioning and maintenance periods. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 1-5
Fulltext: PDF;
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4.
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5.
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6.
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Experimental Program of the HL-LHC Inner Triplet String Test at CERN
/ Yammine, S (CERN) ; Bajko, M (CERN) ; Ballarino, A (CERN) ; Bednarek, M J (CERN) ; Bozzini, D (CERN) ; Blanchard, S (CERN) ; Brüning, O (CERN) ; Cruikshank, P (CERN) ; Denz, R (CERN) ; Ramos, D Duarte (CERN) et al.
This contribution describes the experimental program already undergoing and to be completed on the High Luminosity Large Hadron Collider (HL-LHC) Inner Triplet (IT) String, an important intermediate milestone of the HL-LHC project at CERN. First, it describes the magnet circuits of the HL-LHC IT String. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4001505
Fulltext: PDF;
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7.
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Data acquisition and supervision systems for the HL-LHC quench protection system - part I the hardware
/ Podzorny, Tomasz (CERN) ; Hollos, Adam (CERN) ; Skoczen, Andrzej (AGH-UST, Cracow) ; Garcia, G M (CERN) ; Spasic, Jelena (CERN) ; Steckert, Jens (CERN) ; Christensen, M B B (CERN) ; Galilée, Marc-Antoine (CERN) ; Moya, M M (CERN) ; Denz, Reiner (CERN) et al.
Protection of the superconducting circuits of the High Luminosity Upgrade of the LHC project (HL-LHC) will be ensured by a new generation of quench detection systems and various quench protection systems for the superconducting circuits and magnets.The HL-LHC quench detection systems serve as well as high-performance data acquisition systems, that also provide essential input for the automatic analysis of events such as a superconducting magnet quench.The supervision of the quench protection systems required the development of data acquisition and monitoring systems adapted to the specific characteristics of this equipment. Of particular importance are the protection device supervision units (PDSU), which are monitoring and interlocking the quench heater circuits and the Coupling Loss Induced Quench (CLIQ) systems.All data acquisition and monitoring systems use Ethernet-based communication with precise timing instead of a classic serial fieldbus solution. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPA023
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPA023
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8.
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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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9.
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Summary of the Post-Long Shutdown 2 LHC Hardware Commissioning Campaign
/ Apollonio, Andrea (CERN) ; Andreassen, Odd (CERN) ; Antoine, Alain (CERN) ; Argyropoulos, Theodoros (CERN) ; Bastos, Miguel (CERN) ; Bednarek, Mateusz (CERN) ; Bordini, Bernardo (CERN) ; Brodzinski, Krzysztof (CERN) ; Calia, Andrea (CERN) ; Charifoulline, Zinour (CERN) et al.
In this contribution we provide a summary of the LHC hardware commissioning campaign following the second CERN Long Shutdown (LS2), initially targeting the nominal LHC energy of 7 TeV. A summary of the test procedures and tools used for testing the LHC superconducting circuits is given, together with statistics on the successful test execution. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 335-338
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.335-338
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10.
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Systems performance: Circuits
/ Antoine, A (CERN) ; Bednarek, M (CERN) ; Charifoulline, Z (CERN) ; Coelingh, G J (CERN) ; D'angelo, G (CERN) ; Denz, R (CERN) ; Montabonnet, V (CERN) ; Nielsen, J (CERN) ; Nisbet, D (CERN) ; Panev, B (CERN) et al.
The performance of the LHC magnet circuits for the proton physics run in 2017 is
evaluated. This contribution focuses on the availability of magnet powering (PC)
and protection systems (QPS, EE, FMCM and Interlocks) and evaluates the impact
of the new deployments, mainly the FGClite and RPADO power converters, on the
overall performance of the machine [...]
2019 - 3 p.
- Published in : (2019) , pp. 55-57
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.55-57
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