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1.
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Improvements of the SPS slow extraction electrostatic septum
/ Lackner, Friedrich (CERN) ; Prost, Antoine (CERN) ; Balhan, Bruno (CERN) ; Pirozzi, Fabrizio (CERN) ; Vincke, Helmut (CERN) ; Borburgh, Jan (CERN) ; Kawa, Krzysztof (CERN ; AGH-UST, Cracow) ; Jorat, Louise Olivia (CERN) ; Fraser, Matthew (CERN) ; Roudaut, Noah (CERN ; UTBM, Belfort)
The impact of high-flux protons on the inherent beam loss in the slow extraction straight from SPS towards the North Area has been recently discussed and potential improvements have been proposed. These solutions are mainly aiming to reduce the high component activation and related reduction of lifetime, as well as observed non-straightness in the anode body. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC72
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC72
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2.
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Optimization of mechanical robustness in the booster injection bumpers
/ Lackner, Friedrich (CERN) ; Atanasov, Miroslav (CERN) ; Balhan, Bruno (CERN) ; Baud, Cedric (CERN) ; Borburgh, Jan (CERN) ; M Walraven (Inholland U. Appl. Sci., Alkmaar)
During the Long Shutdown 2 (LS2) at CERN, the new Linac4 (L4) accelerator has been successfully connected to the PS Booster (PSB) to inject 160 MeV H− beam into the 4 superposed PSB rings. The horizontal displacement of the circulating beam during injection relies on 4 pulsed dipole magnets. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPM018
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPM018
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3.
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A Combined Testing and Modelling Methodology for the Mechanics of High-Field Superconducting Magnets
/ Bertarelli, Alessandro (CERN) ; Guinchard, Michael (CERN) ; Holko, Michal (CERN) ; Lackner, Friedrich (CERN) ; Masci, Marco (CERN) ; de Frutos, Oscar Sacristan (CERN) ; Savary, Frédéric (CERN) ; Wolf, Felix (CERN)
The use of superconducting composite cables based
on Nb3Sn, an intermetallic compound of Niobium and Tin, is one
of the favorite routes to reach magnetic fields higher than 10 T
in state-of-the-art accelerator magnets. The brittle and nonlinear
nature of the epoxy-impregnated Nb3Sn Rutherford cable makes
challenging to predict its mechanical limits and, consequently, the
overall performance of the magnet. [...]
2024 - 11 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 1-11
Fulltext: PDF;
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4.
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Design optimization of the water-cooled coil for the LEIR extraction septum
/ Lackner, Friedrich (CERN) ; Balhan, Bruno (CERN) ; Motschmann, Fritz (CERN) ; Borburgh, Jan (CERN) ; Atanasov, Miroslav (CERN) ; Masson, Thierry (CERN) ; Erends, Vera (Utrecht U.)
A pulsed septum magnet (SMH40) is used for heavy ion extraction from the Low Energy Ion Ring (LEIR). A non-conformity on the coil cooling circuit made it necessary to consolidate the design of the septum blade and related manufacturing process. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPM019
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPM019
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5.
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Mechanical Characterization of Nb3Sn Cable Insulation Systems Used for HL-LHC Accelerator Magnets at Ambient Temperature
/ Wolf, Felix (CERN) ; Foussat, Arnaud (CERN) ; Lackner, Friedrich (CERN) ; Sgobba, Stefano (CERN) ; Crouvizier, Mickael (CERN) ; Canfer, Simon (Daresbury) ; Robertson, Steve (Daresbury)
The performance of accelerator magnets is strongly relying on the dielectric strength and mechanical robustness of the insulation system. This is in particular relevant for the current development of high field superconducting Nb
3
Sn magnets with the insulation system made from resin-impregnated glass fibres. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 7700205
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.7700205
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6.
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Design Study of the Nb₃Sn Cos-Theta Dipole Model for FCC-hh
/ Valente, Riccardo U (INFN, Milan) ; Burioli, Sergio (INFN, Genoa ; Genoa U.) ; De Matteis, Ernesto (INFN, Milan) ; Fabbricatore, Pasquale (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Lackner, Friedrich (CERN) ; Levi, Filippo (INFN, Genoa ; Genoa U.) ; Mariotto, Samuele (INFN, Milan) ; Musenich, Riccardo (INFN, Genoa) ; Pampaloni, Alessandra (INFN, Genoa) et al.
In the context of the Future Circular Collider hadron-hadron (FCC-hh) R&D; program, the Italian Institute of Nuclear Physics (INFN), in collaboration with CERN, is responsible for designing and constructing the Falcon Dipole (Future Accelerator post-LHC Costheta Optimized Nb₃Sn Dipole), which is an important step towards the construction of High Field Nb₃Sn magnets for a post LHC collider. The magnet is a short model with one aperture of 50 mm and the target bore field is 12 T (14 T ’ultimate’ field). [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 2421-2424
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2421-2424
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7.
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Preliminary Design of the NB$_3$Sn $cos$ $\theta$ Short Model for the FCC
/ Pampaloni, Alessandra (INFN, Genoa) ; Bellomo, Giovanni (Milan U. ; LASA, Segrate) ; Burioli, Sergio (INFN, Genoa ; U. Genoa) ; De Matteis, Ernesto (LASA, Segrate) ; Fabbricatore, Pasquale (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Lackner, Friedrich (CERN) ; Levi, Filippo (INFN, Genoa ; U. Genoa) ; Mariotto, Samuele (Milan U. ; LASA, Segrate) ; Musenich, Riccardo (INFN, Genoa) et al.
The next generation particle accelerators will need to increase by an order of magnitude the center-of-mass energy: a viable solution is a 100 TeV circular collider, temporarily called Future Circular Collider (FCC). To achieve this goal, a new generation of double aperture superconducting magnets, capable of generating a high quality, stable 16 T magnetic field in a 50 mm bore is being developed. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4900905
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8.
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Progress in the Development of the Nb$_3$Sn MQXFB Quadrupole for the HiLumi Upgrade of the LHC
/ Izquierdo Bermudez, Susana (CERN) ; Ambrosio, Giorgio (Fermilab) ; Apollinari, Giorgio (Fermilab) ; Bajko, Marta (CERN) ; Bordini, Bernardo (CERN) ; Bourcey, Nicolas (CERN) ; Duarte Ramos, Delio (CERN) ; Ferracin, Paolo (LBL, Berkeley) ; Fiscarelli, Lucio (CERN) ; Feher, Sandor (Fermilab) et al.
The high-luminosity upgrade of the Large Hadron Collider (HL-LHC) requires new high field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). With a nominal operating gradient of 132.2 T/m in a 150 mm aperture and a conductor peak field of 11.3 T, the new quadrupole magnets are based on Nb3Sn superconducting technology. [...]
FERMILAB-PUB-21-126-TD.-
2021 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4002007
Fulltext: PDF;
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9.
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Effect of Epoxy Volume Fraction on the Stiffness of Nb$_3$Sn Rutherford Cable Stacks
/ Wolf, Felix (CERN) ; Lackner, Friedrich (CERN) ; Hofmann, Michael (Forschungsreaktor Munich) ; Scheuerlein, Christian (CERN) ; Schoerling, Daniel (CERN) ; Tommasini, Davide (CERN)
For the optimization of Nb3Sn superconducting accelerator magnet design and assembly parameters the stress-strain behavior of the coils needs to be known. We have measured the stiffness of Nb3Sn Rutherford cable stacks with different epoxy volume fraction. [...]
2019 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 8401006
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.8401006
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10.
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Thermomechanical Properties of Polymers for Use in Superconducting Magnets
/ Scheuerlein, Christian (CERN) ; Rehmer, Birgit (BAM, Berlin) ; Finn, Monika (BAM, Berlin) ; Meyer, Christian (BAM, Berlin) ; Uhlemann, Patrick (BAM, Berlin) ; Amez-Droz, Michel (Unlisted, CH) ; Meuter, Florian (CERN) ; Konstantopoulou, Konstantina (CERN) ; Lackner, Friedrich (CERN) ; Savary, Frederic (CERN) et al.
The coefficient of thermal expansion (CTE) and the thermomechanical properties of the polymers used in superconducting magnets need to be known in order to predict their stress state under the different magnet assembly and operating conditions. We have measured Young's moduli of typically used polymers during in situ heat cycles with the dynamic resonance method. [...]
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 7701605
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.7701605
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