1.
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Quench propagation in Nb$_{3}$Sn cos-theta 11 T dipole model magnets in high stress areas
/ Mangiarotti, Franco J (CERN) ; Willering, Gerard P (CERN) ; Bajas, Hugues (CERN) ; Bajko, Marta ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Löffler, Christian H (CERN) ; Gomez, Jose V Lorenzo ; Savary, Frederic (CERN) et al.
A large number of training quenches at various currents, temperatures, and ramp rates, have been performed on six 11 T dipole model magnets. Quenches in the midplane of these magnets were of special interest, since the quench current in the last three models measured in 2016 was limited to between 84% and 92% of the magnets short sample limit. [...]
2018 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4008204
Fulltext: PDF;
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4008204
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2.
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Comparison of Cold Powering Performance of 2-m-Long Nb$_{3}$Sn 11 T Model Magnets
/ Willering, Gerard (CERN) ; Bajko, Marta (CERN) ; Bajas, Hugues (CERN) ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Feuvrier, Jerome (CERN) ; Fiscarelli, Lucio (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Loffler, Christian (CERN) ; Mangiarotti, Franco (CERN) et al.
For the upgrade of the LHC, two 15-m NbTi main dipole magnets are foreseen to be replaced by two 11 T 5.7-m-long Nb$_{3}$Sn dipoles each. A series of model magnets has been produced to verify the design choices that are important for the prototype and series production, focusing on mechanical aspects and protection studies. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4007205
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4007205
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3.
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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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4.
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Cold Powering Tests and Protection Studies of the FRESCA2 100 mm Bore Nb$_{3}$Sn Block-Coil Magnet
/ Willering, G (CERN) ; Petrone, C (CERN) ; Bajko, M (CERN) ; Bajas, H (CERN) ; Bordini, B (CERN) ; Bottura, L (CERN) ; Bourcey, N (CERN) ; Duda, M (CERN ; Cracow, INP) ; Ferracin, P (CERN) ; Feuvrier, J (CERN) et al.
The Nb3Sn block-coil dipole magnet FRESCA2 was developed within the framework of a collaboration between CEA Saclay and CERN, follow up of the European project EuCARD. The magnet is aimed at upgrading the cable test facility at CERN to a bore field of 13 T at 10.6 kA in an aperture of 100 mm as deliverable. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4005105
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4005105
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5.
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Progress on high luminosity LHC Nb$_{3}$Sn magnets
/ Todesco, Ezio (CERN) ; Annarella, M (Brookhaven) ; Ambrosio, Giorgio (Fermilab) ; Apollinari, Giorgio (Fermilab) ; Ballarino, Amalia (CERN) ; Bajas, H (CERN) ; Bajko, Marta (CERN) ; Bordini, Bernardo (CERN) ; Bossert, R (Fermilab) ; Bottura, Luca (CERN) et al.
The HL-LHC project aims at allowing to increase the collisions in the Large Hadron Collider by a factor ten in the decade 2025 - 2035. One essential element are the superconducting magnets around the interaction region points, where large aperture magnets will be installed to allow to further reduce the beam size in the interaction point. [...]
FERMILAB-PUB-18-302-TD.-
2018 - 9 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4008809
Fulltext: PDF;
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4008809
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6.
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Quench propagation velocity and hot spot temperature models in Nb$_{3}$Sn racetrack coils
/ Lorenzo, Jose (Madrid, CIEMAT) ; Bajas, Hugues (CERN) ; Bajko, Marta (CERN) ; Perez, Juan Carlos (CERN) ; Chiuchiolo, Antonella (CERN)
Since 2010 to present, several subsize magnet assemblies, designed as test beds for the validation of impregnated Nb$_{3}$Sn-based coil technology, have been tested at the Superconducting Magnet Test Facility (SM18) at CERN. These short model coils and racetrack model coils have been used to study two types of Rutherford cables foreseen for the coils of the Nb$_{3}$Sn magnets in the framework of the HL-LHC upgrade and High Field Magnet program of CERN. [...]
2018 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4701706
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4701706
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7.
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Test of short model and prototype of the HL-LHC D2 orbit corrector based on CCT technology
/ Mangiarotti, Franco (CERN) ; Kirby, Glyn (CERN) ; Duda, Michal (Cracow, INP ; CERN) ; Mentink, Matthias (CERN) ; Fiscarelli, Lucio (CERN) ; Bajko, Marta (CERN) ; Coll, Dominic (Unlisted, GB) ; Desbiolles, Vincent (CERN) ; Feuvrier, Jerome (CERN) ; Mazet, Jacky (CERN) et al.
In the frame of the high-luminosity upgrade project for the large hadron collider, new twin aperture beam orbit corrector magnets will be installed near the recombination dipole (D2). These magnets are 2.2 m long canted cosine theta NbTi dipoles, with two independently powered apertures oriented such that their field vectors are perpendicular to each other and to the direction of the beams. [...]
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4002305
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.4002305
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8.
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Advanced Nb$_{3}$Sn conductors tested in a racetrack coil configuration for the 11T dipole project
/ Bajas, Hugues (CERN) ; Bajko, Marta (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Rochepault, Etienne (CERN) ; Lorenzo Gomez, Jose V (CERN) ; Chiuchiolo, Antonella (CERN) ; Perez, Juan Carlos (CERN)
Within the 11T dipole magnet conductor development for the high-luminosity LHC upgrade, two types of Nb3 Sn cable based on the powder-in-tube (PIT) and the Rod and Restack processes (RRP) are tested in racetrack configuration in the short model coil (SMC) magnets. In 2016 and 2017, the performances of three different coils wound with 40-strand cables, one made of OST RRP 132/169 and two of PIT 120 strands have been measured using the SMC structure. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4008605
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4008605
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9.
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Tests of the FRESCA2 100 mm bore Nb$_3$Sn block-coil magnet to a record field of 14.6 T
/ Willering, Gerard (CERN) ; Arnestad, Havard (CERN) ; Bajko, Marta (CERN) ; Bajas, Hugo (CERN) ; Bortot, Lorenzo (CERN) ; Bottura, Luca (CERN) ; Bourcey, Nicolas (CERN) ; Duda, Michal (CERN ; Cracow, INP) ; Ferracin, Paolo (CERN) ; Feuvrier, Jerome (CERN) et al.
The Nb$_3$Sn block coil dipole magnet FRESCA2 was developed within the framework of a collaboration between CEA Saclay and CERN, in the continuity of the European project EuCARD and EuCARD2. With an aperture of 100 mm and a target bore field of 13 T at 10.6 kA, the magnet is required for a new FRESCA2 cable test facility at CERN. [...]
2019 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4004906
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10.
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Mechanical analysis of the collaring process of the 11 T dipole magnet
/ Ferracin, Paolo (CERN) ; Bottura, Luca (CERN) ; Bourcey, Nicolas (CERN) ; Daly, Michael (CERN) ; Devred, Arnaud (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Ferradas Troitino, Jose (CERN) ; Ferradas Troitino, Salvador (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) et al.
As part of the Large Hadron Collider (LHC) accelerator upgrades foreseen by the high luminosity-LHC project, the CERN 11 T program is aimed at replacing standard LHC Nb-Ti main dipole magnets, operating with a bore field of 8.3 T, with pairs of shorter Nb$_3$Sn dipole magnets with a bore field of 11 T and the same total integrated field, thus providing space for additional collimators in the dispersion suppressor region. At the time of the submission of this paper, six single-aperture and two double-aperture short models have been fabricated and tested. [...]
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4002705
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