1.
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Current $MgB_{2}$ wire performance and their industrial development
/ Grasso, G (Columbus Superconductors, Genoa) ; Brisigotti, S (Columbus Superconductors, Genoa) ; Pietranera, D (Columbus Superconductors, Genoa) ; Tumino, A (Columbus Superconductors, Genoa) ; Berta, S (Columbus Superconductors, Genoa) ; Penco, R (Columbus Superconductors, Genoa) ; Demencik, E (Columbus Superconductors, Genoa) ; Braccini, V (CNR-INFM, Genoa) ; Malagoli, A (CNR-INFM, Genoa) ; Vignolo, M (CNR-INFM, Genoa) et al.
Although just recently discovered as a superconductor, Magnesium Diboride has already demonstrated its clear potential for an effective use in a variety of applications. With its critical temperature of about 40 K, MgBB2 gives the opportunity to operate devices at cryogenic temperatures of the order of 20 K, allowing for the use of alternative, cost effective, and simpler technologies than liquid helium. [...]
CERN, 2009
Published version from CERN: PDF;
In : Workshop on Accelerator Magnet Superconductors, Design and Optimization, CERN, Geneva, Switzerland, 19 - 23 May 2008, pp.78-82 (CERN-2009-001)
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2.
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Characterization of Freeze-Dried Boron Nanopowders and Parameter Optimization in Ex Situ MgB2 Wire Production
/ Capra, Marco (U. Genoa ; CNR-SPIN, Naples) ; Bovone, Gianmarco (CNR-SPIN, Naples) ; Loria, Federico (CNR-SPIN, Naples) ; Bernini, Cristina (CNR-SPIN, Naples) ; Tropeano, Matteo (ASG Supercond., Genova) ; Tumino, Andrea (ASG Supercond., Genova) ; Grasso, Gianni (ASG Supercond., Genova) ; Hopkins, Simon C (CERN) ; Ballarino, Amalia (CERN) ; Ferdeghini, Carlo (Genoa U.) et al.
This article reports a study to identify optimal synthesis parameters for a pure boron precursor prepared following a patented process developed at CNR-SPIN laboratories, performed in the framework of a collaboration between CNR-SPIN and CERN. Boron is a precursor that plays a crucial role in the MgB2wire manufacturing, as a consequence, the synthesis parameters of the superconducting phase have been investigated. [...]
2021 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 6200107
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3.
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Weak acid leaching of MgB$_2$ to purify magnesiothermic boron powder
/ Capra, Marco (Genoa U.) ; Bovone, Gianmarco (CNR, Italy) ; Loria, Federico (CNR, Italy) ; Bernini, Cristina (CNR, Italy) ; Hopkins, Simon C (CERN) ; Ballarino, Amalia (CERN) ; Tropeano, Matteo (ASG Supercond., Genova) ; Tumino, Andrea (ASG Supercond., Genova) ; Grasso, Gianni (ASG Supercond., Genova) ; Ferdeghini, Carlo (CNR, Italy) et al.
We have established a new procedure for recovering boron contained in oxidized MgB$_2$ phase. Incorrect conditions of synthesis or conservation, or excess impurities in precursors, can lead to MgO formation with consequent degradation of superconducting properties, thus representing a possible problem in the industrial production of MgB$_2$ conductors following the ex-situ PIT process. [...]
2021
- Published in : Materials Today Communications 26 (2021) 101731
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4.
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Evidence for Longitudinal Homogeneity and No J$_e$ Degradation in Bi-2212 Wires Realized by the GDG Process
/ Leoncino, Luca (CNR-SPIN, Naples) ; Celentano, Giuseppe (ENEA, Rome) ; Chiarelli, Sandro (ENEA, Rome) ; Leveratto, Alessandro (CNR-SPIN, Naples) ; Putti, Marina (U. Genoa) ; Ferdeghini, Carlo (CNR-SPIN, Naples) ; Ballarino, Amalia (CERN) ; Hopkins, Simon C (CERN) ; Malagoli, Andrea (CNR-SPIN, Naples)
The GDG fabrication process developed at CNR-SPIN is a promising method for producing Bi-2212 wires without overpressure processing. In this paper, critical current measurements performed at ENEA on both short and long samples in magnetic fields up to 14 T are compared. [...]
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 6400305
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.6400305
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5.
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The reactive Mg-liquid infiltration to obtain long superconducting MgB$_{2}$ cables
/ Giunchi, G (EDISON, Milan)
An alternative “in situ” process to the MgB2 wire manufacturing is represented by the Reactive Mg-Liquid Infiltration (Mg-RLI) process [1], in which the precursor wire is constituted by a metallic sheath encasing a central Mg rod, surrounded by the B powders. We demonstrated that this peculiar “internal Mg” assembly is able to produce very dense superconducting material of high critical current density, with an acceptable fill factor, up to 0.28. [...]
CERN, 2009
Published version from CERN: PDF;
In : Workshop on Accelerator Magnet Superconductors, Design and Optimization, CERN, Geneva, Switzerland, 19 - 23 May 2008, pp.83-88 (CERN-2009-001)
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6.
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7.
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Effects of K excess in microstructure of (Ba$_{0.6}$K$_{0.4}$)Fe$_{2}$As$_{2}$ superconducting powders
/ Bellingeri, Emilio (CNR-SPIN, Naples) ; Bernini, Cristina (CNR-SPIN, Naples) ; Loria, Federico (CNR-SPIN, Naples) ; Traverso, Andrea (CNR-SPIN, Naples) ; Leveratto, Alessandro (CNR-SPIN, Naples) ; Braccini, Valeria (CNR-SPIN, Naples) ; Ballarino, Amalia (CERN) ; Malagoli, Andrea (CNR-SPIN, Naples)
Iron-based superconductors (IBSs) are promising for high-field applications due to their exceptional characteristics, like ultrahigh upper critical field and minimal electromagnetic anisotropy. Creating multifilamentary superconducting wires with elevated transport critical current density is essential for practical use. [...]
2024 - 9 p.
- Published in : Supercond. Sci. Technol. 37 (2024) 095014
Fulltext: PDF;
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8.
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Analysis of Fe(Se,Te) Films Deposited On Unbuffered Invar 36
/ Sylva, Giulia (Genoa U.) ; Malagoli, Andrea (CNR-SPIN, Genova) ; Bellingeri, Emilio (CNR-SPIN, Genova) ; Putti, Marina (Genoa U.) ; Ferdeghini, Carlo (CNR-SPIN, Genova) ; Vannozzi, Angelo (ENEA, Frascati) ; Celentano, Giuseppe (ENEA, Frascati) ; Hopkins, Simon C (CERN) ; Lunt, Alexander (CERN) ; Ballarino, Amalia (CERN) et al.
In this paper, the feasibility of producing Fe(Se,Te)-coated conductors on cost-effective, unbuffered Invar 36 substrates is studied. A suitable substrate with a sharp {001}<100> texture and a misorientation angle lower than 10° was developed, and the possibility of growing epitaxial thin films without any buffer layer was demonstrated. [...]
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 7300105
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9.
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The BEST PATHS Project on $MgB_2$ Superconducting Cables for Very High Power Transmission
/ Ballarino, Amalia (CERN) ; Bruzek, Christian E (Nexans France) ; Dittmar, Nico (Dresden, Tech. U.) ; Giannelli, Sebastiano (CERN) ; Goldacker, Wilfried (KIT, Karlsruhe) ; Grasso, Giovanni (Columbus Supercond., Genova) ; Grilli, Francesco (KIT, Karlsruhe) ; Haberstroh, Christoph (Dresden, Tech. U.) ; Hole, Stephane (ESPCI, Paris) ; Lesur, Frederic (RTE, Courbevoie) et al.
BEST PATHS (acronym for “BEyond State-of-the-art Technologies for rePowering Ac corridors and multi-Terminal HVDC Systems”) is a collaborative project within the FP7 framework of the European Commission that includes an $MgB_2$ -based power transmission line among its five constituent demonstrators. Led by Nexans and bringing together transmission operators, industry and research organizations, this demonstrator aims at validating the novel $MgB_2$ technology for very high power transfer (gigawatt range). [...]
2016 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 26 (2016) 5401705
In : 12th European Conference on Applied Superconductivity, Lyon, France, 06 - 10 Sep 2015, pp.5401705
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10.
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Reverse advance internal magnesium diffusion process to produce dense MgB$_{2}$ bulks and high $J$$_{C}$ wires through high pressure heat treatment
/ Bovone, G. (U. Genoa) ; Capra, M. (U. Genoa) ; Bernini, C. (Genoa U.) ; Loria, F. (U. Genoa) ; Cetner, T. (Warsaw, Inst. Phys.) ; Gajda, D. (Wroclaw, Inst. Low Temp.) ; Morawski, A. (Warsaw, Inst. Phys.) ; Ballarino, A. (CERN) ; Hopkins, S. C. (CERN) ; Tropeano, M. (ASG Supercond., Genova) et al.
Here we report a new versatile technique to manufacture MgB$_{2}$ massive samples, called reverse advance internal magnesium diffusion (r-AIMI). The idea focuses on the goal of obtaining dense bulk or wire samples depending on synthesis conditions. [...]
2020 - 8 p.
- Published in : Supercond. Sci. Technol. 33 (2020) 125003
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