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Modelling V-I Measurements of Nb$_3$Sn Accelerator Magnets With Conductor Degradation
/ Keijzer, Ruben (CERN ; Twente U., Enschede) ; Succi, Giovanni (CERN) ; Willering, Gerard (CERN) ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Mangiarotti, Franco J (CERN) ; Dhallé, Marc (Twente U., Enschede) ; Kate, Herman H J Ten (Twente U., Enschede)
In the framework of the High-Luminosity Large Hadron Collider (HL-LHC) project, 11 T dipole and MQXF quadrupole magnets employing Nb$_3$Sn technology have been tested in short and long test configurations. Nb$_3$Sn magnets are more sensitive than Nb-Ti magnets to a potential degradation of their conductors during production, testing, and cycling operation. At CERN, new diagnostic tools and measurement procedures have been developed to investigate, in detail, the performance of Nb$_3$Sn accelerator type magnets. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4001105
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4001105
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Ultra-Thin Solenoid and Cryostat Development for Novel Detector Magnets
/ Ilardi, Veronica (Twente U., Enschede) ; Silva, Hélder F P (CERN) ; Kulenkampff, Tobias (Vienna, Tech. U.) ; Dudarev, Alexey (CERN) ; de Sousa, Patricia Borges (CERN) ; Mentink, Matthias (CERN) ; Dhalle, Marc (Twente U., Enschede) ; Kate, Herman H J Ten (Twente U., Enschede)
In the scope of the Future Circular electron positron Collider study (FCC-ee), the IDEA detector is developed. It comprises a superconducting solenoid with free bore of 4 m, 6 m long and a central magnetic field of 2 T. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4500205
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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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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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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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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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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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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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Design and Preparation of Two ReBCO-CORC® Cable-In-Conduit Conductors for Fusion and Detector Magnets
/ Mulder, T (Twente U., Enschede ; CERN) ; van der Laan, D (Advanced Conductor Technologies, Boulder ; Colorado U.) ; Weiss, J D (Advanced Conductor Technologies, Boulder ; Colorado U.) ; Dudarev, A (CERN) ; Dhallé, M (Twente U., Enschede) ; ten Kate, H H J (CERN)
Two new ReBCO-CORC® based cable-in-conduit conductors (CICC) are developed by CERN in collaboration with ACT-Boulder. Both conductors feature a critical current of about 80 kA at 4.5 K and 12 T. [...]
2017 - 8 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng. 279 (2017) 012033
Fulltext: PDF;
In : 2017 Cryogenic Engineering Conference and International Cryogenic Materials Conference, Madison, WI, USA, 9 - 13 Jul 2017, pp.012033
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