Homogeneity of Nb3Sn wires with artificial pinning centres
| Main Authors: | Mattia Ortino, Stephan Pfeiffer, Xingchen Xu, Mike Sumption, Xuan Peng, Thomas Baumgartner, Johannes Bernardi, Michael Eisterer |
|---|---|
| Format: | Proceeding poster |
| Bahasa: | eng |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3580975 |
Daftar Isi:
- Nb3Sn is experiencing a renaissance thanks to the high performance required for the Future Circular Collider (FCC-hh) 16T dipole magnets. One of the most promising technologies for improving the conductor performance is the introduction of artificial pinning centers (APC). Here we present the characterization of prototype PIT Nb3Sn wires with 4at.%Ta-1at.%Zr and 4at.%Ta-1at.%Hf additions, manufactured by Hyper Tech Inc.(USA). SQUID magnetometry was used to assess Jc, benchmarking the high field results obtained by resistive measurements; local inhomogeneities were evaluated by means of AC susceptibility (SQUID) and scanning Hall probe microscopy (SHPM). These results were then related with the microstructure for investigating possible relations between radial-Tc distribution and Sn % content.