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CERN Document Server Sök i 2,037 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.48 sekunder. 
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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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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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Quench Heater Technology for HL-LHC Superconducting Accelerator Magnets / Scheuerlein, Christian (CERN) ; De Oliveira, Rui (CERN) ; Piccin, Roland (CERN) ; Meuter, Florian (CERN) ; Glogiewicz, Fabian (CERN) ; Katzer, Balduin (KIT, Karlsruhe) ; Thetter, Tobias (CERN)
Quench heaters for the active protection of superconducting magnets are large flexible circuits that are produced in a photolithographic process. The HL-LHC quench heater base material, the circuit production process and the qualification tests are described. [...]
2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4701105 Fulltext: PDF;
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Study of the Heater-Coil Electrical Insulation for the HL-LHC Low Beta Quadrupoles / Marinozzi, Vittorio (Fermilab) ; Ambrosio, Giorgio (Fermilab) ; Baldini, Maria (Fermilab) ; Izquierdo Bermudez, Susana (CERN) ; Ferracin, Paolo (LBL, Berkeley) ; Krave, Steven (Fermilab) ; Muratore, Joseph (BNL, NSLS) ; Nobrega, Alfred (Fermilab) ; Parker, Marcellus (Fermilab) ; Todesco, Ezio (CERN) et al.
In the framework of the HL-LHC project, the present LHC low-β superconducting quadrupoles will be substituted with higher performance Nb3Sn magnets (MQXF) with 11.4 T coil peak field. MQXF coils are impregnated with epoxy resin to reduce risk of stress concentration on the brittle conductor. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4001705
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Assessment of MQXF Quench Heater Insulation Strength and Test of Modified Design / Baldini, Maria (Fermilab) ; Ambrosio, Giorgio (Fermilab) ; Anerella, Michael D (Brookhaven) ; Bermudez, Susana I (CERN) ; Bossert, Rodger C (Fermilab) ; Ferracin, Paolo (LBL, Berkeley) ; Krave, Steven (Fermilab) ; Mangiarotti, Franco J (CERN) ; Marinozzi, Vittorio (Fermilab) ; Nobrega, Alfred (Fermilab) et al.
The HL-LHC interaction region magnet triplets (Q1,Q2, and Q3) will be composed of superconducting Nb3Sn quadru-poles. The MQXF quadrupole protection system is based on CLIQ (Coupling-Loss Induced Quench system) and outer layer quench heaters.This paper reports a summary of quench heaters to coil high voltage tests performed on MQXF short and long coils in air after fabrication, and in air and He gas after magnet training. [...]
FERMILAB-PUB-20-617-TD.- 2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4701305 Fulltext: PDF; External link: Fermilab Accepted Manuscript
In : Applied Superconductivity Conference, Online, 24 Oct - 7 Nov 2020
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Quench protection study of a 11 T Nb$_3$Sn model dipole for the High Luminosity LHC / Izquierdo Bermudez, Susana (CERN) ; Mangiarotti, Franco (CERN) ; Willering, Gerard (CERN) ; Bajko, Marta (CERN) ; Bottura, Luca (CERN) ; Ferradas Troitino, Jose (CERN) ; Guinchard, Michael (CERN) ; Savary, Frederic (CERN) ; Vallone, Giorgio (CERN)
The planned upgrade of the Large Hadron Collider collimation system requires the installation of 11 T Nb$_3$Sn dipole magnets in the dispersion suppressor areas. Due to the large stored energy density and the low copper stabilizer section, the quench protection of these magnets is particularly challenging. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4701005
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Characterization of the Copper Resistance in the LHC Main Dipole Bypass Diode Leads / Bednarski, Mikolaj (Cracow, INP) ; Ludwin, Jaromir (Cracow, INP) ; Wojas, Damian (Cracow, INP) ; Bednarek, Mateusz (CERN) ; D’Angelo, Giorgio (CERN)
A fundamental component of the quench protection system of the large hadron collider (LHC) superconducting dipole magnets are bypass diodes. During a quench, the high current powering the magnet coil is redirected through the parallel diode. [...]
2022 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4005507
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A Database for Storing Magnet Parameters and Analysis of Quench Test Results in HL-LHC Nb$_{3}$Sn Short Model Magnets / Salmi, Tiina (Tampere U. of Tech.) ; Tarhasaari, Timo (Tampere U. of Tech.) ; Izquierdo-Bermudez, Susana (CERN)
In recent years, several Nb3Sn high field magnet prototypes have been designed and tested in preparation for the LHC Luminosity upgrade and also for the potential Future Circular Collider (FCC). In this paper we present a Microsoft Excel -based database tool for storing magnet design parameters and results from quench protection tests. [...]
2020 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4703705
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Accelerator Magnet Quench Heater Technology and Quality Control Tests for the LHC High Luminosity Upgrade / Meuter, Florian
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) foresees the installation of new superconducting Nb$_{3}$Sn magnets [...]
CERN-THESIS-2017-021 - 58 p.

Fulltext - Full text - Full text
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10.
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Quench Protection Performance Measurements in the First MQXF Magnet Models / Ravaioli, E (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Bajas, H (CERN) ; Chlachidze, G (Fermilab) ; Fernandez Navarro, A (CERN) ; Ferracin, P (CERN) ; Izquierdo Bermudez, S (CERN) ; Joshi, P (Brookhaven Natl. Lab.) ; Muratore, J (Brookhaven Natl. Lab.) ; Rodriguez-Mateos, F (CERN) et al.
The European Organization for Nuclear Research (CERN) and U.S. LHC Accelerator Research Program (LARP) are jointly developing Nb3Sn quadrupole magnets to be installed in the LHC for its upgrade to higher luminosity. [...]
FERMILAB-PUB-17-371-TD.- 2018 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4701606 Fulltext: PDF; External link: Fulltext
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4701606
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