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CERN Accelerating science

CERN Document Server 8 registres trobats  La cerca s'ha fet en 0.99 segons. 
1.
Lessons learned from hardware failure during HL-LHC AUP cabling / Lee, Elizabeth (LBL, Berkeley) ; Baskys, Algirdas (CERN) ; Lin, Andy (LBL, Berkeley) ; Perez, Carlos (LBL, Berkeley) ; Buron, Elaine (LBL, Berkeley) ; Pong, Ian (LBL, Berkeley) ; Croteau, Jean-Francois (LBL, Berkeley) ; Naus, Michael (LBL, Berkeley) ; Lipton, Thomas (LBL, Berkeley)
The cabling facility at Lawrence Berkeley National Laboratory has experienced a heavy increase in workload during the US-HiLumi Accelerator Upgrade Project (AUP). Several critical components have experienced unexpected failure over the project’s lifetime for reasons at least partly attributable due to increased wear and tear on the hardware subsystems. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) WEPS80 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPS80
2.
Microstructure Characterization of Nb$_3$Sn Wires With Nanoprecipitate Artificial Pinning Centers Using Synchrotron High-Energy X-Rays / Croteau, Jean-Francois (LBL, Berkeley) ; Baskys, Algirdas (LBL, Berkeley ; CERN) ; Naus, Michael (LBL, Berkeley) ; Park, Jun-Sang (Argonne, PHY) ; Kenesei, Peter (Argonne, PHY) ; Xu, Xingchen (Fermilab) ; Wan, Fang (Fermilab) ; Pong, Ian (LBL, Berkeley)
Synchrotron high-energy X-rays were used in an attempt to estimate nanoprecipitate size and size distribution in Nb$_3$Sn powder-in-tube wires with ZrO$_2$ or HfO$_2$ rtificial pinning centers via small angle X-ray scattering (SAXS). The effect of sample preparation was studied but measurements for as-received and for partially etched wires were not successful. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 8000505
3.
An experimental assessment of rotor superconducting stack demagnetization in a liquid nitrogen environment / Smara, Anis (Cambridge U.) ; Mineev, Nikolay (Cambridge U.) ; Climente-Alarcon, Vicente (Cambridge U.) ; Patel, Anup (Cambridge U.) ; Baskys, Algirdas (Cambridge U. ; CERN) ; Glowacki, Bartek A (Cambridge U. ; Inst. Power Eng., Warsaw) ; Reis, Thomas (Oswald Elektromotoren GmbH, Miltenberg)
Stacks of high-temperature superconducting tape have proved to trap in laboratory conditions levels of magnetic flux density one order of magnitude above actual state-of-the-art permanent magnets. Their simple manufacturing, high mechanical properties and intrinsic resistance to sudden quench greatly facilitate their utilization in industrial applications, amongst them, as a source of magnetic flux density in the rotor of electrical machines. [...]
2019 - Published in : Supercond. Sci. Technol. 32 (2019) 085009
4.
Phase Evolution During Heat Treatment of Nb$_3$Sn Wires Under Development for the FCC Study / Hopkins, Simon C (CERN) ; Baskys, Algirdas (CERN) ; Ballarino, Amalia (CERN) ; Lachmann, Jonas (TU Bergakademie Freiberg) ; Leineweber, Andreas (TU Bergakademie Freiberg)
In recent years, the phase formation sequence during heat treatment of Nb$_3$Sn wires, and the influence of the microstructure and compositional homogeneity of Nb$_3$Sn on in-field critical current ($I_c$), have received increasing attention. For RRP wires, the importance of understanding and managing the formation of the ternary phase nausite has been demonstrated. [...]
2021 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 1-6 Fulltext: PDF;
5.
Quantitative Analysis and Optimization of Nb$_3$Sn Wire Designs Toward Future Circular Collider Performance Targets / Hopkins, Simon C (CERN) ; Baskys, Algirdas (CERN) ; Valero, Adrià Canós (CERN) ; Ballarino, Amalia (CERN)
In the context of the Future Circular Collider (FCC) study, industrial and academic partners are developing novel Nb3Sn superconducting wires with a wide variety of layouts, production methods, and compositions, with the aim of achieving challenging performance targets including a non-copper critical current density of 1500 A mm-2at 16 T and 4.2 K. There is a clear need for a systematic and quantitative approach to analyze these conductors, identifying correlations between performance, microstructure, and wire design, in order to optimize designs and heat treatments, and to identify the most promising directions for future trials. [...]
2019 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 6001307
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.6001307
6.
Design, Performance and Cabling Analysis of Nb3Sn Wires for the FCC Study / Hopkins, Simon C (CERN) ; Baskys, Algirdas (CERN) ; Bordini, Bernardo (CERN) ; Fleiter, Jerome (CERN) ; Ballarino, Amalia (CERN)
The hadron collider proposed by the Future Circular Collider (FCC) study would require high-field superconducting magnets capable of producing a dipole field of around 16 T in a 50 mm aperture. To develop a suitable conductor for these magnets, CERN is coordinating a conductor development programme aiming to obtain Nb$_3$Sn wire with a non-copper critical current density of 1500 A mm$^{-2}$ at 16 T and 4.2 K, in lengths suitable for manufacturing 14 m long magnets, and able to withstand cabling without significant degradation. [...]
IOP, 2020 - 10 p. - Published in : J. Phys.: Conf. Ser. 1559 (2020) 012026 Published fulltext: PDF;
In : 14th European Conference on Applied Superconductivity, Glasgow, United Kingdom, 1 - 5 Sep 2019, pp.012026
7.
Cross-field demagnetization of stacks of tapes: 3D modeling and measurements / Kapolka, Milan (Bratislava, Electrotech. Inst.) ; Pardo, Enric (Bratislava, Electrotech. Inst.) ; Grilli, Francesco (KIT, Karlsruhe) ; Baskys, Algirdas (Cambridge U. ; CERN) ; Climente-Alarcon, Vicente (Cambridge U.) ; Dadhich, Anang (Bratislava, Electrotech. Inst.) ; Glowacki, Bartek A. (Cambridge U. ; Inst. Power Eng., Warsaw)
Stacks of superconducting tapes can trap much higher magnetic fields than conventional magnets. This makes them very promising for motors and generators. [...]
arXiv:1909.12129.- 2020-03-13 - 15 p. - Published in : Supercond. Sci. Technol. 33 (2020) 044019 Fulltext: 10.1088_1361-6668_ab5aca - PDF; 1909.12129 - PDF;
8.
Computation of Superconducting Stacks Magnetization in an Electrical Machine / Climente-Alarcon, Vicente (Cambridge U. (main)) ; Patel, Anup (Cambridge U. (main)) ; Baskys, Algirdas (CERN) ; Glowacki, Bartek A (Cambridge U. (main) ; Inst. Power Eng., Warsaw)
Superconducting technology offers the prospect of sharply increasing power density of rotating electrical machines, especially in the low-speed, high-torque range, with impact in applications such as wind energy and aircraft propulsion. Among the enabling technologies, stacks consisting of piled up layers of high-temperature superconductors may provide a source of magnetic flux density for torque production, without the complexity of superconducting wound rotor poles. [...]
2019 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 5204506

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