Characterization of the Mechanical Properties of Nb<sub>3</sub>Sn Coils

Fernández, José Luis Rudeiros; Pérez, Juan Carlos; Troitino, Salvador Ferradas; Guinchard, Michael; Grosclaude, Philippe; Crouvizier, Mickael Denis; Langeslag, S. A. E.; Bermúdez, Susana Izquierdo; Savary, F.

doi:10.1109/tasc.2019.2897959

Cited by 11 publications

(6 citation statements)

References 12 publications

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“…Despite being a well-known material, new perspective applications of Nb 3 Sn, such as superconductive radio frequency cavities (SRFC) [1,2] also for magnetic environments [3][4][5][6] and improved magnets for new particles accelerators (e.g. the High Luminosity upgrade of LHC, or the Future Circular Collider FCC [7,8]), are revamping the interest in Nb 3 Sn characterization [9][10][11]. In fact, it is necessary to test this SC in the new challenging working conditions of these applications, to better understand how to improve its performances.…”

Section: Introductionmentioning

confidence: 99%

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb₃Sn

Alimenti

Pompeo

Torokhtii

et al. 2020

Supercond. Sci. Technol.

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The high frequency vortex motion in Nb3Sn was analyzed in this work up to 12 T. We used a dielectric loaded resonator tuned at 15 GHz to evaluate the surface impedance Z of a Nb3Sn bulk sample (24.8 at.%Sn). From the field induced variation of Z, the high frequency vortex parameters (the pinning constant k p , the depinning frequency ν p and the flux flow resistivity ρ ff ) were obtained over a large temperature and field range; their field and temperature dependencies were analyzed. Comparison with other superconducting materials shows that high frequency applications in strong magnetic fields are also feasible with Nb3Sn. In the present work, we report the first measurements about the microwave response in Nb3Sn in strong magnetic fields.

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Section: Introductionmentioning

confidence: 99%

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb₃Sn

Alimenti

Pompeo

Torokhtii

et al. 2020

Supercond. Sci. Technol.

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“…In order to minimize the C-shaped mica contribution, the width of the mica tape was increased from 25 to 31 mm, reducing the gap in the middle of the cable from 7 to 1 mm. Mechanical measurements on coil segments show a negligible impact of the insulation layout on the coil stiffness [28].…”

Section: Cable Insulationmentioning

confidence: 96%

Mechanical analysis of the Nb₃Sn 11 T dipole short models for the High Luminosity Large Hadron Collider

Bermúdez

Nilsson

Bottura

et al. 2019

Supercond. Sci. Technol.

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For the Large Hadron Collider luminosity upgrade, two of the NbTi 8.3 T main bending dipoles will be replaced by two shorter Nb 3 Sn 11.2 T dipoles to create space for the installation of collimators in the dispersion suppression region. With the aim to verify the design features, several 2 m long 11 T models have been constructed and tested at CERN. During the fabrication and assembly of, so far, seven single and two double aperture short model magnets, several challenges were identified and tackled. These include reproducibility in coil fabrication and assembly procedure, as well as control of mechanical stresses in the conductor and surrounding structure. In order to limit coil over-compression and improve reproducibility, the cable insulation was re-optimized. In addition, a review of the collaring procedure of the 11 T magnet was launched with the goal of reducing the risk of conductor degradation due to excessive stress. In this paper, the main fabrication and assembly steps are described, including the description of the actions taken to resolve the identified weakness.

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“…In simulations typically a linear-elastic coil behavior is assumed. To determine the linear-elastic stiffness value different fitting methods are under discussion [25], [26], yielding for the same measurements results differing by up to around 50%. Measurement procedures and fitting methods are under further investigation to produce representative results.…”

Section: B Coil Structural Characterizationmentioning

confidence: 99%

The 16 T Dipole Development Program for FCC and HE-LHC

Schoerling

Arbelaez

Auchmann

et al. 2019

IEEE Trans. Appl. Supercond.

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A future circular collider (FCC) with a center-ofmass 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. In these programs, cos-theta, block-type, common-coil, and canted-costheta magnets are ex-plored; first model magnets are under manufacture; limits on con-ductor stress levels are studied; and a conductor with enhanced characteristics is developed. This paper summarizes and discusses the status, plans, and preliminary results of these programs.

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Characterization of the Mechanical Properties of Nb₃Sn Coils

Cited by 11 publications

References 12 publications

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb₃Sn

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb₃Sn

Mechanical analysis of the Nb₃Sn 11 T dipole short models for the High Luminosity Large Hadron Collider

The 16 T Dipole Development Program for FCC and HE-LHC

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Characterization of the Mechanical Properties of Nb3Sn Coils

Cited by 11 publications

References 12 publications

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb3Sn

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb3Sn

Mechanical analysis of the Nb3Sn 11 T dipole short models for the High Luminosity Large Hadron Collider

The 16 T Dipole Development Program for FCC and HE-LHC

Contact Info

Product

Resources

About

Characterization of the Mechanical Properties of Nb₃Sn Coils

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb₃Sn

Microwave measurements of the high magnetic field vortex motion pinning parameters in Nb₃Sn

Mechanical analysis of the Nb₃Sn 11 T dipole short models for the High Luminosity Large Hadron Collider