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New Measurement Techniques Used for the Electrical Quality Assurance of HL-LHC Superconducting Magnets
/ Ludwin, Jaromir (Cracow, INP ; CERN) ; Bednarek, Mateusz (CERN) ; Rosa, Tiago Catalo Da (CERN ; Unlisted, PT)
In preparation of the Large Hadron Collider (LHC) upgrade to High Luminosity LHC (HL-LHC), a number of new Nb3Sn magnets, including short model and prototype magnets, had to be electrically qualified. The process included a number of well-established Electrical Quality Assurance (ELQA) tests, such as electrical continuity checks of the magnet instrumentation, High-Voltage (HV) insulation tests of the magnet and quench heater circuits, and impedance measurements. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9001205
Fulltext: PDF;
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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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4.
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Preparation and Execution of the Electrical Quality Assurance Program On the LHC Superconducting Circuits During the Second Long Shutdown
/ Ludwin, Jaromir (CERN) ; Bednarek, Mateusz (CERN) ; Bednarski, Mikolaj (CERN ; Cracow, INP) ; Bielewski, Jaroslaw (CERN ; Cracow, INP) ; Bogdali, Pawel (CERN ; Cracow, INP) ; D'Angelo, Giorgio (CERN) ; Daniluk, Witold (CERN ; Cracow, INP) ; Dutkiewicz, Erazm Maria (CERN ; Cracow, INP) ; Grzadziel, Dominik (CERN ; Cracow, INP) ; Janik, Grzegorz (CERN ; Cracow, INP) et al.
The electrical quality assurance (ELQA) of the superconducting circuits of CERN’s Large Hadron Collider (LHC) during its second Long Shutdown (LS2) requires the execution of vast measurement campaigns. Each of 1658 electrical circuits as well as the instrumentation of each of the 1746 individual cryo-assemblies housing magnets, bus-bars and other components of the superconducting circuits, has to undergo a series of tests. [...]
2021 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4002404
Fulltext: PDF;
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5.
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Upgrade of the Arc Interconnection Verification System for the Large Hadron Collider
/ Bednarski, Mikolaj (Cracow, INP) ; Jurkiewicz, Piotr (Cracow, INP) ; Ludwin, Jaromir (Cracow, INP) ; Wojas, Damian (Cracow, INP) ; Bednarek, Mateusz (CERN) ; D'Angelo, Giorgio (CERN)
This article presents the design and construction of a new version of an automated, highly efficient system for validation of connections between superconducting magnets in the Large Hadron Collider at CERN, Genève, Switzerland.The design of the new version is based on the existing comprehensive system for electrical measurements and is its integral part. The new system is dedicated to perform multi channel resistance measurements and is to be used during machine assembly and magnets replacement..
IEEE, 2019 - 5 p.
- Published in : 10.23919/MIXDES.2019.8787158
In : 26th International Conference on Mixed Design of Integrated Circuits and System, Rzeszow, Poland, 27 - 29 Jun 2019, pp.106-110
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6.
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Energy Deposition Studies and Analysis of the Quench Behavior in the Case of Asynchronous Dumps During 6.5 TeV LHC Proton Beam Operation
/ Frankl, Matthias (CERN) ; Bartmann, Wolfgang (CERN) ; Bednarek, Mateusz (CERN) ; Bracco, Chiara (CERN) ; Lechner, Anton (CERN) ; Verweij, Arjan (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN)
The CERN LHC beam dumping system comprises a series of septa and fast-pulsed kicker magnets for extracting the stored proton beams to the external beam dumps. Different absorbers in the extraction region protect superconducting magnets and other machine elements in case of abnormal beam aborts, where bunches are swept across the machine aperture. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF028
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF028
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7.
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The Second LHC Long Shutdown (LS2) for the Superconducting Magnets
/ Tock, Jean-Philippe (CERN) ; Bednarek, Mateusz (CERN) ; Bottura, Luca (CERN) ; Karentzos, Efstathios (CERN ; Natl. Tech. U., Athens) ; Le Naour, Sandrine (CERN) ; Meuter, Florian (CERN) ; Pojer, Mirko (CERN) ; Scheuerlein, Christian (CERN) ; Todesco, Ezio (CERN) ; Tommasini, Davide (CERN) et al.
The Large Hadron Collider (LHC) has been delivering data to the physics experiments since 2009. It first operated at a centre of mass energy of 7 TeV and 8 TeV up to the first long shutdown (LS1) in 2013-14. [...]
CERN-ACC-2018-114.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF056
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF056
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8.
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Resistance of Splices in the LHC Main Superconducting Magnet Circuits at 1.9 K
/ Charifoulline, Zinour (CERN) ; Bednarek, Mateusz Jakub (CERN) ; Denz, Reiner (CERN) ; Le Naour, Sandrine (CERN) ; Scheuerlein, Christian (CERN) ; Siemko, Andrzej (CERN) ; Steckert, Jens (CERN) ; Tock, Jean-Philippe (CERN) ; Verweij, Arjan (CERN) ; Zerlauth, Markus (CERN)
The electrical interconnections between the LHC main magnets are made of soldered joints (splices) of two superconducting Rutherford cables, stabilized by a copper busbar. In 2009, a number of splices was found not properly stabilized and could have suffered a thermal runaway in case of quench at high current. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4003405
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4003405
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9.
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Design, Assembly and Use of a Device to Eliminate Earth Faults Caused by Metallic Debris in the LHC Main Dipole Circuits
/ Bednarek, Mateusz Jakub (CERN) ; Siemko, Andrzej (CERN) ; Rodriguez-Mateos, Felix (CERN) ; Pietrzak, Pawel (AGH-UST, Cracow) ; Stachón, Krzysztof (CERN) ; D'Angelo, Giorgio (CERN) ; Pemberton, Stephen (CERN)
The superconducting dipole magnets of the Large Hadron Collider operate in a superfluid helium bath at 1.9K. As a part of the magnet quench protection system, each dipole magnet is equipped with a bypass diode located in the helium bath. [...]
2017 - 1 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2017) 4005805
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4005805
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10.
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A Statistical Analysis of Electrical Faults in the LHC Superconducting Magnets and Circuits
/ Bottura, Luca (CERN) ; Tock, Jean-Philippe (CERN) ; Auchmann, Bernard (CERN) ; Bednarek, Mateusz (CERN) ; Calcoen, Daniel (CERN) ; Charifoulline, Zinour (CERN) ; Coelingh, Gert-Jan (CERN) ; D'Angelo, Giorgio (CERN) ; Hagen, Per (CERN) ; Le Naour, Sandrine (CERN) et al.
The large hadron collider (LHC) at CERN has been operating and generating physics experimental data since September 2008, and following its first long shut down, it has entered a second, 4-year-long physics run. It is to date the largest superconducting installation ever built, counting over 9000 magnets along its 27-km long circumference. [...]
2017 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2017) 4000505
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4000505
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