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  • 1
    Language: English
    In: IEEE transactions on applied superconductivity, 2016-04, Vol.26 (3), p.1-4
    Description: The European Organization for Nuclear Research (CERN) is developing a six-around-one conductor on round core (CORC)-strand-based cable-in-conduit conductor (CICC) for use in detector and other large magnet systems. The CICC comprises six ReBCO-CORC strands helically wound around a central tube or rod and inserted in a square aluminum jacket. A major design challenge is finding a simple yet low-resistive method of injecting current homogeneously into the CORC strands of the CICC. In the production of joints for single-CORC cables, we are currently pursuing a method in which the different ReBCO layers at both ends of the CORC cable are trimmed into a staircase-like geometry. A similar trimming method is developed for joint terminals for the ReBCO-CORC-based CICC. A demonstration joint terminal is made to test the various steps of the trimming and manufacturing process before fabricating a joint terminal with real CORC strands. This paper presents an overview of CIC-joint terminal design, simulation results, and the different steps in the manufacturing process.
    Subject(s): Resistance ; CORC ; Critical current density (superconductivity) ; Cooling ; Superconducting magnets ; Conductors ; Cable-in-Conduit-Conductor ; ReBCO ; Electron tubes ; Copper ; Joints ; Condensed Matter Physics ; Electrical and Electronic Engineering ; Electronic, Optical and Magnetic Materials
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 2
    Language: English
    In: IEEE transactions on applied superconductivity, 2019-01, Vol.29 (1), p.1-5
    Description: A proper understanding of the degradation of the transport properties of cable-in-conduit conductors (CICCs) due to a changing strain distribution or to crack formation in the filaments is essential to determine the operational limits of the conductors and to optimize their design. Based on the electrical and strain properties of the superconducting strand, the performance of short samples of the CICC can be analyzed, such as the ones tested in the SULTAN facility, or the full-size CICC used in real magnets. Mathematical fitting expressions are proposed to implement strand properties into the cable model. In combination with the strain maps generated by the mechanical model MULTIFIL, these expressions are introduced in the electromagnetic code JackPot to predict the current sharing temperature of the CICC of the international thermonuclear experimental reactor (ITER) Central Solenoid. A comparison is made with SULTAN short samples tests as well.
    Subject(s): Superconducting cables ; superconductivity ; Power cables ; Conductors ; Cable-in-conduit conductor (CICC) ; Mathematical model ; Integrated circuit modeling ; Strain ; Condensed Matter Physics ; Electrical and Electronic Engineering ; Electronic, Optical and Magnetic Materials ; Superconductivity
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 3
    Language: English
    In: IEEE transactions on applied superconductivity, 2016-06, Vol.26 (4), p.1-5
    Description: The European Organization for Nuclear Research (CERN) is developing high-current ReBCO-CORC strand-based cables for use in future large-scale detector magnets. A six-around-one, forced flow gas-cooled ReBCO-CORC cable-in-conduit conductor (CICC) is envisioned for application in magnets operating in the 20-40 K temperature range. A CICC, rated for 45 kA at 4.2 K and 10 T, is designed and in production. The CICC comprises a cable of six CORC strands helically wound around a tube. The cable has an expected current density of 105 A/mm 2 at 10 T/4.2 K, which corresponds to an overall current density of 53 A/mm 2 . A cable current density of 110 A/mm 2 can be reached when increasing the temperature to 20 K and operating in a magnetic field of 5 T.
    Subject(s): CORC ; Cable-in-Conduit Conductor ; Welding ; Superconducting magnets ; Conductors ; CICC ; ReBCO ; Electron tubes ; Copper ; Thermal stability ; Cable shielding ; Condensed Matter Physics ; Electrical and Electronic Engineering ; Electronic, Optical and Magnetic Materials
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 4
    Language: English
    In: IEEE transactions on applied superconductivity, 2016-06, Vol.26 (4), p.1-5
    Description: CERN is developing high-current ReBCO conductor on round core (CORC) cables for application in future detector and accelerator magnets. A characterization test on a ReBCO-CORC cable sample and its joints is performed in the 10-T FRESCA cable test facility at CERN. The sample is taken from the first 12-m-long CORC production. Key is the characterization of the field- and temperature-dependent critical currents of the CORC cable at 1.9 K and 4.2 K. Secondary objectives include evaluating the response of the CORC cable to quenches and the performance of cylindrical low resistive cable terminals especially designed and manufactured for use on CORC cables. The 7.6-mm CORC cable features 8 kA at 4.2 K and 10 T, and the joint terminals show a 25 ± 5 - nΩ resistance for 20-cm length.
    Subject(s): Superconducting cables ; Resistance ; Integrated circuits ; CORC ; Power cables ; Critical current density (superconductivity) ; Cable joints ; Heating ; Superconducting magnets ; ReBCO ; characterization ; Condensed Matter Physics ; Electrical and Electronic Engineering ; Electronic, Optical and Magnetic Materials
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 5
    Article
    Article
    2015
    ISSN: 1662-9779  ISSN: 1012-0394 
    Language: English
    In: Solid state phenomena, 2015, Vol.230, p.253-258
    Description: Formation of bismuth-based high-Tc superconducting ceramics 2212 and 2223 with partial replacement of Bi by p-elements of group III (Ga, In, Tl), IV (Ge, Sn, Pb), or V (Sb) was studied. XRPD, DTA/TG, SEM/EDX, SQUID, and VSM were used for phase identification, structural analysis, grain morphology studies, chemical analysis and magnetic measurements.
    Subject(s): Condensed Matter Physics ; Atomic and Molecular Physics, and Optics ; Materials Science(all) ; High-Tc superconductor ; Phase formation ; Bi-2212 ; Bi-2223 ; Crystal structure
    ISSN: 1662-9779
    ISSN: 1012-0394
    E-ISSN: 1662-9779
    Source: Alma/SFX Local Collection
    Source: ProQuest Central
    Source: © ProQuest LLC All rights reserved〈img src="https://exlibris-pub.s3.amazonaws.com/PQ_Logo.jpg" style="vertical-align:middle;margin-left:7px"〉
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  • 6
    Language: English
    In: IEEE transactions on applied superconductivity, 2013, Vol.23 (3)
    Description: Experimental results of interfilament resistance measurements obtained with different facilities are compared. Two internal tin Nb3Sn strand types are tested at the University of Twente (UT) and ENEA Frascati. The direct interfilament resistance is measured with a standard four-point voltage-current (V- I) method. At the UT, a probe-station is used with micropoint-contact needles as voltage taps and current leads. At ENEA, the results are attained by a setup with microbonded contacts through thin aluminum (Al) wires. To extract values for the filament-to-matrix contact resistance and for the effective transverse resistivity from these experiments, finite element method simulations are required. The results of the experiments are in good agreement. In addition, we correlate the effective transverse resistivity, derived from the direct interfilament resistance measurement, to values measured and calculated from ac coupling loss.
    Subject(s): IR-88853 ; METIS-301392 ; Electrical engineering. Electrical power engineering ; Applied sciences ; Various equipment and components ; Electric connection. Cables. Wiring ; Exact sciences and technology
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 7
    Language: English
    In: IEEE transactions on applied superconductivity, 2015-06, Vol.25 (3), p.1-7
    Description: EuCARD-2 is a project supported by FP7-European Commission that includes, inter alia, a work-package (WP10) called "Future Magnets." This project is part of the long term development that CERN is launching to explore magnet technology at 16 T to 20 T dipole operating field, within the scope of a study on Future Circular Colliders. The EuCARD2 collaboration is closely liaising with similar programs for high field accelerator magnets in the USA and Japan. The main focus of EuCARD2 WP10 is the development of a 10 kA-class superconducting, high current density cable suitable for accelerator magnets, The cable will be used to wind a stand-alone magnet 500 mm long and with an aperture of 40 mm. This magnet should yield 5 T, when stand-alone, and will enable to reach a 15 to 18 T dipole field by placing it in a large bore background dipole of 12-15 T. REBCO based Roebel cables is the baseline. Various magnet configurations with HTS tapes are under investigation and also use of Bi-2212 round wire based cables is considered. The paper presents the structure of the collaboration and describes the main choices made in the first year of the program, which has a breadth of five to six years of which four are covered by the FP7 frame.
    Subject(s): Coils ; Superconducting cables ; High-temperature superconductors ; Accelerators Magnets ; Collaboration ; Future Magnets ; Eucard2 ; Superconducting magnets ; Conductors ; Accelerator magnets ; IR-97507 ; EC Grant Agreement nr.: FP7-EUCARD2 ; METIS-312068 ; High temperature superconductors ; Usage ; Calcium compounds ; Barium compounds ; Reorganization and restructuring ; Nuclear Experiment ; Physics
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 8
    Language: English
    In: IEEE transactions on applied superconductivity, 2018-04, Vol.28 (3), p.1-10
    Description: The EuCARD2 collaboration aims at the development of a 10 kA-class superconducting, high current density cable suitable for accelerator magnets, to be tested in small coils and magnets capable to deliver 3-5 T when energized in stand-alone mode, and 15-18 T when inserted in a 12-13 T background magnet. REBCO tape, assembled in a Roebel cable, was selected as conductor. The developed REBCO tape has reached a record engineering critical current density, at 4.2 K and 18 T of 956 A/mm 2 . Roebel cable carried up to 13 kA at 20 K when tested in a small coil (FeatherM0.4). Then a first dipole magnet, wound with two low-grade Roebel cables of 25 m each, was assembled and tested. The dipole reached the short sample critical current of 6 kA generating more than 3 T central field at about 5.7 K, with indications of good current transfer among cable strands and of relatively soft transition. The construction of a costheta dipole is also discussed. Eucard2 is reaching its objective and is continuing with the H2020-ARIES program aiming at doubling the Je at 20 T to obtain 6 T as standalone and 18 T as insert in a high field facility.
    Subject(s): Coils ; High-temperature superconductors ; accelerator magnets ; Critical current density (superconductivity) ; Collaboration ; HTS dipoles ; Superconducting magnets ; Conductors ; HTS conductor ; Condensed Matter Physics ; Electrical and Electronic Engineering ; Electronic, Optical and Magnetic Materials
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 9
    Language: English
    In: Applied physics letters, 2001-11-05, Vol.79 (19), p.3116-3118
    ISSN: 0003-6951
    E-ISSN: 1077-3118
    Source: American Institute of Physics (AIP) Publications
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  • 10
    Language: English
    In: Superconductor science & technology, 2019-10-25, Vol.32 (12), p.125006
    Description: The main aim of the EU H2020 project EcoSwing was to demonstrate a technical readiness level of 6-7 for high-temperature superconducting (HTS) technology operating in a wind generator. To reach this goal, a full-scale synchronous HTS generator was successfully designed, built and field-tested in a 3.6 MW turbine. The generator has a rotor with 40 superconducting coils of 1.4 m long. The required 〉20 km of coated conductor was produced within the project's time schedule. All coils were tested prior to assembly, with 〉90% of them behaving as expected. The technical readiness level of HTS coils was thus increased to level 7. Simultaneously, the maturing of cryogenic cooling technology over the last decade was illustrated by the several Gifford-McMahon cold-heads that were installed on-board the rotor and connected with the stationary compressors through a rotating coupling. The cryogenic system outperformed design expectations, enabling stable coil temperatures far below the design temperature of 30 K after only 14 d of cool-down. After ground-based testing at the IWES facility in Bremerhaven, Germany, the generator was installed on an existing turbine in Thyborøn, Denmark. Here, the generator reached the target power range and produced power for over 650 h of grid operation.
    Subject(s): wind turbine ; superconducting machinery ; superconducting generator ; HTS ; Condensed Matter Physics ; Materials Chemistry ; Electrical and Electronic Engineering ; Superconducting generator ; Metals and Alloys ; Superconducting machinery ; Ceramics and Composites ; Wind turbine
    ISSN: 0953-2048
    E-ISSN: 1361-6668
    Source: IOPscience extra
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