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1.
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Local plastic deformation effects on the critical current of high-J$_{c}$ Nb$_{3}$Sn strands under uniaxial strain
/ Liu, Yunhao (Hefei, CUST) ; Sun, Yi (Hefei, CUST) ; Gao, Peng (Hefei, CUST) ; Nijhuis, Arend (Twente U., Enschede) ; Devred, Arnaud (CERN) ; Guo, Zichuan (Hefei, CUST) ; Zhu, Huajin (Guangxi Normal U.) ; Xu, Peng (Hefei, CUST) ; Shi, Yi (Hefei, CUST) ; Liu, Fang (Hefei, CUST)
In order to meet the target operating parameters of the toroidal field coils (TFCs) for the next-generation Chinese compact burning plasma tokamak, high critical current density (J$_{c}$) Nb$_{3}$Sn strand will be applied to the high-field winding-package of the TFC. To improve the transverse stiffness of the cable in withstanding the huge Lorentz force and avoiding conductor performance degradation, the short-twist-pitch and copper-wound-strand cable patterns were taken into consideration. [...]
2024 - 7 p.
- Published in : Supercond. Sci. Technol. 37 (2024) 115009
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2.
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Transverse-pressure susceptibility of high-$J_c$ RRP and PIT types of Nb$_3$Sn Rutherford cables for accelerator magnets
/ Gao, P (Hefei, Inst. Plasma Phys. ; Twente U., Enschede) ; Dhallé, M (Twente U., Enschede) ; Bordini, B (CERN) ; Ballarino, A (CERN) ; Ten Kate, H H J (Twente U., Enschede)
In the frame of the High-Luminosity Large Hadron Collider construction and Future Circular Collider development program, the magnetic field in the accelerator dipole magnets is being enhanced to 11 T, and 15 T to 16 T level, respectively. Advanced Nb3Sn superconductors with a non-copper critical current density exceeding 2500 A mm$^{−2}$ at 4.2 K and 12 T, are being developed using the Restacked-Rod-Process (RRP) and Powder-In-Tube (PIT) wire technologies. [...]
2020 - 18 p.
- Published in : Supercond. Sci. Technol. 33 (2020) 125005
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3.
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Pressure-induced critical current reduction in impregnated Nb$_{3}$Sn Rutherford cables for use in future accelerator magnets
/ Gao, P. (Twente U., Enschede) ; Dhallé, M (Twente U., Enschede) ; ten Kate, H H J (Twente U., Enschede ; CERN)
The measured critical current reduction in Nb3Sn Rutherford cables under magnet-relevant transverse pressure levels is analyzed in terms of the strain state of the filaments inside their strands. Several straightforward mechanical 2D FE models of the cables’ cross-section are used to translate the stress that is applied to the surface of the impregnated cables into a strain distribution on its strands. [...]
2020 - 8 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng. 756 (2020) 012015
Fulltext from publisher: PDF; External link: Fulltext from publisher
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Hartford, Connecticut, 21 - 25 Jul 2019, pp.012015
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4.
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10.3990/1.9789402816587
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5.
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Inter-strand resistance and AC loss in resin-filler impregnated ReBCO Roebel cables
/ Gao, P (Twente U., Enschede ; Southwest Jiaotong U.) ; Dhallé, M (Twente U., Enschede) ; van Nugteren, B (Twente U., Enschede) ; Norder, H (Twente U., Enschede) ; Kario, A (KIT, Karlsruhe) ; Otten, S (KIT, Karlsruhe) ; Goldacker, W (KIT, Karlsruhe) ; van Nugteren, J (CERN) ; Kirby, G (CERN) ; de Rijk, G (CERN) et al.
In the frame of the EuCARD2 collaboration, aimed at developing the technology for 20 T class accelerator magnets, several demonstrator dipole magnets are being built using high critical current density and fully transposed ReBCO tape-based Roebel-type cables. In accelerator magnets the dynamic magnetic field quality is one of the key parameters, which is affected by the effective inter-strand resistances in the cables. [...]
2019 - 12 p.
- Published in : Supercond. Sci. Technol. 32 (2019) 125002
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6.
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Effect of resin impregnation on the transverse pressure dependence of the critical current in ReBCO Roebel cables
/ Gao, P (Twente U., Enschede ; Southwest Jiaotong U.) ; Wessel, W A J (Twente U., Enschede) ; Dhallé, M (Twente U., Enschede) ; Otten, S (KIT, Karlsruhe) ; Kario, A (KIT, Karlsruhe) ; Van Nugteren, J (Twente U., Enschede ; CERN) ; Kirby, G (CERN) ; Bottura, L (CERN) ; ten Kate, H H J (CERN ; Twente U., Enschede)
ReBCO Roebel cables are being developed as one of the promising routes towards much higher-field magnets for future particle accelerators. The Lorentz forces generated in such magnets lead to sizeable transverse pressure on the superconducting cables, in the present 15–20 T magnet designs of the order of 100–150 MPa. [...]
2019 - 9 p.
- Published in : Supercond. Sci. Technol. 32 (2019) 055006
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7.
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The 16 T dipole development program for FCC and HE-LHC
/ Schoerling, Daniel (CERN) ; Arbelaez, Diego (LBNL, Berkeley) ; Auchmann, Bernhard (PSI, Villigen) ; Bajko, Marta (CERN) ; Ballarino, Amalia (CERN) ; Barzi, Emanuela (Fermilab) ; Bellomo, Giovanni (INFN, Milan) ; Benedikt, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Bordini, Bernardo (CERN) et al.
A future circular collider (FCC) with a center-of-mass energy of 100 TeV and a circumference of around 100 km, or an energy upgrade of the LHC (HE-LHC) to 27 TeV require bending magnets providing 16 T in a 50-mm aperture. Several development programs for these magnets, based on Nb$_3$Sn technology, are being pursued in Europe and in the U.S. [...]
FERMILAB-PUB-19-400-TD.-
2019 - 9 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4003109
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8.
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Powering of an HTS dipole insert-magnet operated standalone in helium gas between 5 and 85 K
/ Van Nugteren, J (CERN) ; Kirby, G (CERN) ; Bajas, H (CERN) ; Bajko, M (CERN) ; Ballarino, A (CERN) ; Bottura, L (CERN) ; Chiuchiolo, A (CERN) ; Contat, P-A (CERN) ; Dhallé, M (Twente U., Enschede) ; Durante, M (Saclay) et al.
This paper describes the standalone magnet cold testing of the high temperature superconducting (HTS) magnet Feather-M2.1-2. This magnet was constructed within the European funded FP7-EUCARD2 collaboration to test a Roebel type HTS cable, and is one of the first high temperature superconducting dipole magnets in the world. [...]
2018 - 12 p.
- Published in : Supercond. Sci. Technol. 31 (2018) 065002
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9.
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Status of the 16 T Dipole Development Program for a Future Hadron Collider
/ Tommasini, Davide (CERN) ; Arbelaez, Diego (LBL, Berkeley) ; Auchmann, Bernhard (CERN) ; Bajas, Hugues (CERN) ; Bajko, Marta (CERN) ; Ballarino, Amalia (CERN) ; Barzi, Emanuela (Fermilab) ; Bellomo, Giovanni (INFN, Milan) ; Benedikt, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) et al.
A next step of energy increase of hadron colliders beyond the LHC requires high-field superconducting magnets capable of providing a dipolar field in the range of 16 T in a 50-mm aperture with accelerator quality. These characteristics could meet the requirements for an upgrade of the LHC to twice the present beam energy or for a 100-TeV center of mass energy future circular collider. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4001305
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4001305
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10.
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The EuCARD2 Future Magnets Program for Particle Accelerator High-Field Dipoles: Review of Results and Next Steps
/ Rossi, Lucio (CERN) ; Badel, Arnaud (IUT, Grenoble) ; Bajas, Hugues (CERN) ; Bajko, Marta (CERN) ; Ballarino, Amalia (CERN) ; Barth, Christian (Geneva U.) ; Betz, Ulrich (SIS GmbH) ; Bottura, Luca (CERN) ; Broggi, Francesco (LASA, Segrate) ; Chiuchiolo, Antonella (CERN) et al.
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. [...]
2017 - 10 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2017) 4001810
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4001810
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