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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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2.
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Guide réseau pour les ordinateurs personnels au CERN : Le groupe de travail NICE
/ Andrews, C ; Bomand, Μ. ; Deloose, I. ; Flockhart, B. ; Foster, D. ; Hagen, P. ; Knight, A. ; Mitchell, I. ; Pace, A. ; Smith, P. et al.
CERN-PS-CO-Note-93-63.-
Geneva : CERN, 1994 - 154 p.
Fulltext: PDF;
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3.
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4.
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Powering Tests and Magnet Training
/ Mentink, M (CERN) ; Apollonio, A (CERN) ; Bednarek, M (CERN) ; Calcoen, D (CERN) ; Charifoulline, Z (CERN) ; Hagen, P (CERN) ; Naour, S Le (CERN) ; Pojer, M (CERN) ; Scheuerlein, C (CERN) ; Steckert, J (CERN) et al.
In this paper the powering tests and magnet training during the hardware
commissioning campaigns of Run 2 are discussed, and the implications of running
at 7 TeV from a magnet training and reliability perspective are given. During
Run 2, the efficiency of powering tests has steadily increased due to enhanced
control software, more automatic analysis, and more experienced CERN personnel.
The MP3 Intervention Matrix, used for documenting requalification procedures
after interventions, is presented. [...]
2019 - 6 p.
- Published in : , pp. 67-72
Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.67-72
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5.
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ebook
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6.
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A fast quench protection system for high-temperature superconducting magnets
/ van Nugteren, Jeroen (CERN) ; Murtomäki, Jaakko Samuel (CERN) ; Ruuskanen, Janne (Tampere U. of Tech.) ; Kirby, Glyn (CERN) ; Hagen, Per (CERN) ; de Rijk, Gijs (CERN) ; Ten Kate, Herman (CERN) ; Bottura, Luca (CERN) ; Rossi, Lucio (CERN)
For reaching very high magnetic fields in fully superconducting magnets, beyond 16 T for particle accelerators dipoles and beyond 23 T for solenoids, the use of High-Temperature Superconductors (HTS) is unavoidable. Due to the high Minimum Quench Energy in HTS these coils are much more difficult to protect against quenches using conventional methods such as quench heaters or Coupling Loss Induced Quench (CLIQ). [...]
2018 - 8 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2018) 4700108
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4700108
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7.
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Geometric field errors of short models for MQXF, the Nb$_{3}$Sn low-$\beta$ quadrupole for the High Luminosity LHC
/ Izquierdo Bermudez, Susana (CERN) ; Ambrosio, Giorgio (Fermilab) ; Bajas, Hugues (CERN) ; Chlachidze, Guram (Fermilab) ; Ferradas Troitino, Jose (CERN) ; Ferracin, Paolo (CERN) ; Fiscarelli, Lucio (CERN) ; Hagen, Per (CERN) ; Holik, Eddie Frank (Fermilab) ; Di Marco, Joseph (Fermilab) et al.
In the framework of the high-luminosity upgrade of the large hadron collider, the U.S. LARP collaboration and CERN are jointly developing a 150-mm aperture Nb$_{3}$Sn quadrupole for the Large Hadron Collider (LHC) interaction regions. [...]
2018 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4006306
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4006306
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8.
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Training of the Main Dipoles Magnets in the Large Hadron Collider Toward 7 TeV Operation
/ Todesco, E (CERN) ; Willering, G (CERN) ; Auchmann, B (CERN) ; Bajko, M (CERN) ; Bottura, L (CERN) ; Bruning, O (CERN) ; De Rijk, G (CERN) ; Fessia, P (CERN) ; Hagen, P (CERN) ; Mapelli, D (Milan Bicocca U.) et al.
During 2016, one-quarter of the LHC main dipoles have has been powered above the 7.7 T operational field, to reach a field of 8.1 T. These tests were done to confirm the extrapolation of the training behavior based on a Gaussian tail of the quench distribution. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4006905
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4006905
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9.
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Optics and Non-Linear Beam Dynamics at 4 and 6.5 TeV
/ Tomás, R (CERN) ; Bach, T (CERN) ; Hagen, P (CERN) ; Langner, A (CERN) ; Levinsen, Y I (CERN) ; Mcateer, M J (CERN) ; Maclean, E H (CERN) ; Persson, T H B (CERN) ; Skowronski, P (CERN) ; White, S (CERN)
2012 has been an extraordinary year for the control and understanding of the LHC optics. A record low β-beating of about 7% has been achieved during nominal operation. [...]
Geneva : CERN, 2012 - 12 p.
- Published in : (2012) , pp. 171-182
Fulltext: PDF;
In : 4th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 17 - 20 Dec 2012, pp.171-182
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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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