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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
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X-Ray Absorption Spectroscopy to Investigate Precipitated Oxides in Nb3Sn Wires With an Internal Oxygen Source
/ Bovone, G (Geneva U.) ; Buta, F (Geneva U.) ; Lonardo, F (Geneva U.) ; Bonura, M (Geneva U.) ; Borca, C N (PSI, Villigen) ; Huthwelker, T (PSI, Villigen) ; Hopkins, S C (CERN) ; Ballarino, A (CERN) ; Boutboul, T (CERN) ; Senatore, C (Geneva U.)
Internal oxidation can achieve significantly enhanced Jcin Nb3Sn wires, but the mechanism of oxygen transport and oxide precipitation is not fully understood. Our investigation employs X-ray Absorption Near-Edge Structure (XANES) spectroscopy, revealing insights into the oxidation of Zr and its interaction with oxygen in different areas of the wire cross section. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 6000205
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3.
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Effect of the fabrication route on the phase and volume changes during the reaction heat treatment of Nb3Sn superconducting wires
/ Scheuerlein, C (CERN) ; Andrieux, J (Lyon U.) ; Michels, M (CERN) ; Lackner, F (CERN) ; Meyer, C (BAM, Berlin) ; Chiriac, R (Lyon U.) ; Toche, F (Lyon U.) ; Hagner, M (Konstanz U.) ; Di Michiel, M (ESRF, Grenoble)
Accelerator magnets that can reach magnetic fields well beyond the Nb-Ti performance limits are presently being built and developed, using Nb$_3$Sn superconductors. This technology requires reaction heat treatment (RHT) of the magnet coils, during which Nb$_3$Sn is formed from its ductile precursor materials (a “wind and react” approach). [...]
2020 - 13 p.
- Published in : Supercond. Sci. Technol. 33 (2020) 034004
Fulltext: PDF;
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Field Quality of the 4.5-m-Long MQXFA Pre-Series Magnets for the HL-LHC Upgrade as Observed During Magnet Assembly
/ Wang, X (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Yahia, A Ben (Brookhaven) ; Cheng, D W (LBL, Berkeley) ; DiMarco, J (Fermilab) ; Ferracin, P (LBL, Berkeley) ; Ghiorso, W (LBL, Berkeley) ; Izquierdo Bermudez, S (CERN) ; Myers, C (LBL, Berkeley) ; Pan, H (LBL, Berkeley) et al.
The U.S. High-Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP) is developing MQXFA magnets, a series of 4.5 m long 150 mm aperture high-field Nb$_3$Sn quadrupole magnets for the HL-LHC upgrade at CERN. [...]
FERMILAB-PUB-22-524-TD.-
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4002405
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4002405
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5.
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Influence of the Heat Treatment on the Layer JC of Internal-Sn Nb3Sn Wires With Internally Oxidized Nanoparticles
/ Lonardo, F (Geneva U.) ; Bovone, G (Geneva U.) ; Buta, F (Geneva U.) ; Bonura, M (Geneva U.) ; Bagni, T (Geneva U. ; Uppsala U.) ; Medina-Clavijo, B (CERN) ; Ballarino, A (CERN) ; Hopkins, S C (CERN) ; Boutboul, T (CERN) ; Senatore, C (Geneva U.)
We evaluated various heat treatments (HT) for maximizing the Nb3Sn layer thickness while retaining a refined grain microstructure in low filament count internal-Sn Nb3Sn Rod-In-Tube wires with internally oxidized nanoparticles. These wires were manufactured in our laboratory using SnO2as oxygen source and Nb alloys containing Ta and Zr or Hf. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 6000305
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Assembly and Pre-Loading Specifications for the Series Production of the Nb$_3$Sn MQXFA Quadrupole Magnets for the HL-LHC
/ Ferracin, P (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Cheng, D W (LBL, Berkeley) ; Ferradas Troitino, J (CERN) ; Garcia Fajardo, L (LBL, Berkeley) ; Izquierdo Bermudez, S (CERN) ; Prestemon, S (LBL, Berkeley) ; Ray, K L (LBL, Berkeley) ; Solis, M J (LBL, Berkeley) ; Todesco, E (CERN) et al.
The High Luminosity LHC (HL-LHC) Project is planning to install 16 cold-masses made with Nb3Sn quadrupole magnets in the LHC Interaction Regions to significantly increase its luminosity. Half of these cold masses are fabricated at BNL, FNAL, and LBNL under the US Accelerator Research Program (AUP). [...]
2022 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4000306
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4000306
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AUP First Pre-Series Cryo-Assembly Design Production and Test Overview
/ Feher, S (Fermilab) ; Ambrosio, G (Fermilab) ; Apollinari, G (Fermilab) ; Baldini, M (Fermilab) ; Bossert, R (Fermilab) ; Carcagno, R (Fermilab) ; Chlachidze, G (Fermilab) ; DiMarco, J (Fermilab) ; Rabehl, R (Fermilab) ; Stoynev, S (Fermilab) et al.
New high field and large-aperture quadrupole magnets for the low-beta inner triplets (Q1, Q2, Q3) have been built and tested as part of the high-luminosity upgrade of the Large Hadron Collider (HL-LHC). These new quadrupole magnets are based on Nb3Sn superconducting technology. [...]
FERMILAB-CONF-23-0891-TD.-
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4005605
Fermilab Library Server: PDF; External link: Fermilab Library Server
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9.
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Synchrotron radiation techniques for the characterization of Nb$_{3}$Sn superconductors
/ Scheuerlein, C (CERN) ; Di Michiel, M (ESRF, Grenoble) ; Buta, F (Geneva U.)
The high flux of high energy x-rays that can be provided through state-of-the-art high energy synchrotron beam lines has enabled a variety of new experiments with the highly absorbing Nb$_{3}$Sn superconductors. We report different experiments with Nb$_{3}$Sn strands that have been conducted at the ID15 High Energy Scattering beam line of the European Synchrotron Radiation Facility (ESRF). [...]
CERN-AT-2008-039.-
Geneva : CERN, 2009 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 19 (2009) 2653-2656
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : Applied Superconductivity Conference 2008, Chicago, IL, USA, 17 - 22 Aug 2008, pp.2653-2656
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Influence of transverse stress exerted at room temperature on the superconducting properties of Nb$_3$Sn wires
/ Ebermann, P (CERN ; Vienna, Tech. U., Atominst.) ; Baumgartner, T (Vienna, Tech. U., Atominst.) ; Behnsen, J (U. Manchester (main)) ; Daly, M (CERN) ; Terricabras, A Gallifa (CERN) ; Koettig, T (CERN) ; Lackner, F (CERN) ; Scheuerlein, C (CERN) ; Eisterer, M (Vienna, Tech. U., Atominst.)
Results on the irreversible degradation of Rutherford cables caused by transverse stress applied at room temperature have been recently published in the frame of the Future Circular Collider study for the 16 T dipole development programme. In order to investigate the degradation process of Nb3Sn composite superconductors, experiments based on wires of the same type as used in the cable have been launched. [...]
2019 - 18 p.
- Published in : Supercond. Sci. Technol. 32 (2019) 095010
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