Conveners
M2OrA - Superconductor Materials III: Nb3Sn
- Lance Cooley (Fermilab)
- Leszek Motowidlo (SupraMagnetics, Inc.)
Matthias Mentink
(CERN)
6/30/15, 11:00 AM
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Invited Oral Presentation
Externally applied strain affects the superconducting properties of Nb3Sn in a detrimental way. This is an important design issue in high-magnetic-field applications utilizing Nb3Sn technology where distortion due to Lorentz forces and differential thermal contraction is unavoidable.
An overview is given of how the critical current density of Nb3Sn is affected by temperature, magnetic field...
Xingchen Xu
(the Ohio State University)
6/30/15, 11:30 AM
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
In an earlier work we demonstrated on a monofilament that the internal oxidation method can significantly refine the grain size and improve the high-field Jc of Nb3Sn strands. In that work we found that as the Nb3Sn grain size was reduced down to 20-50 nm (with an average of 36 nm), the peak of the Fp-B curve shifted from 0.2Birr to 0.34Birr. In this work we further reduce the grain size by...
Lance Cooley
(Fermilab)
6/30/15, 11:45 AM
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
The LHC will undergo a replacement of the inner triplets at the two main interaction regions between 2020 and 2023. Leading up to this activity will be the production of approximately 90 quadrupole magnets starting in 2018, for which approximately 10 tons of Nb3Sn conductor will be procured. The lead time for this conductor requires orders to be placed starting in 2016. This presentation...
Xuan Peng
(Hyper Tech Research Inc.)
6/30/15, 12:00 PM
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
Tube type Nb3Sn conductor has been being explored by Hyper Tech Research Inc. Our standard conductor with 217 filament arrays have been generated with 12 T non-Cu Jc values of about 2400-2500 A/mm2 with filament size of 40 micros at the 0.85 mm strand. Recently we made 547 filament conductor which has filament size of 25 micros at the 0.85 mm strand without any drawing issue. We are working to...
Michael Brown
(Florida State University)
6/30/15, 12:15 PM
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
PIT and RRP® Nb3Sn strands are being studied as potential candidates for high field accelerator magnet upgrades for the LHC. It is well known that maintaining diffusion barrier integrity in these strands is vital to retaining adequate RRR for magnet stability. Here we report a quantitative study of the shape and position of filaments or sub-elements after rolling lengths of unreacted PIT and...
