Jun 24 – 28, 2019
Crowne Plaza Brussels Le Palace
Europe/Zurich timezone

FCC-hh Nb3Sn wire development: superconducting and magnetic properties of prototype samples

Jun 25, 2019, 3:30 PM
1h
Klimt (Ground floor)

Klimt

Ground floor

Poster Superconducting magnets & associated technologies Poster session

Description

Nb3Sn is the principally envisaged superconductor for the Future Circular Collider (FCC-hh) dipole magnets, in principle able to reach the required specifications (non-Cu Jc=1.5 kA/mm2 at 16T and 4.2K). We present the superconducting and magnetic characterization of prototype internal tin Nb3Sn wires, manufactured at the Bochvar Institute (RU) with different designs and heat treatments. In particular, the possible inhomogeneities related to the manufacturing process were investigated by means of magnetization methods: AC susceptibility was used to assess the critical temperatures of the samples, evaluating as well the longitudinal inhomogenities. The local properties were investigated using scanning Hall probe microscopy (SHPM): field maps of the Meissner-state revealed the effective geometry of the prototype design (sub-elements structure, barriers, width of resistive separators) whereas the scans of the remnant field enabled us to calculate the local critical currents. For these purposes, all the samples were carefully prepared reaching slice thicknesses of about 10 um. These results will be related to the microstructural analysis performed at USTEM (TU Wien).

Primary authors

Alice Moros (Technische Universität Wien) Maxim Alekseev (Bochvar Institute of Inorganic Materials) Anastasia Tsapleva (Bochvar Institute of Inorganic Materials) Pavel Lukyanov (Bochvar Institute of Inorganic Materials) ILDAR ABDYUKHANOV (VNIINM (Bochvar Institute)) Victor Pantsyrny (Bochvqr Institute) Bernardo Bordini (CERN) Simon Hopkins (CERN) Amalia Ballarino (CERN) Johannes Bernardi Michael Eisterer (Vienna University of Technology (AT))

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