Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 17, Issue 2, Pages 2560-2563Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2007.899495
Keywords
superconducting materials
Ask authors/readers for more resources
Performance improvements are needed for large scale applications of Nb3Sn, such as ITER or LHC upgrades. The highest critical current density (J(c)) values are achieved in distributed-barrier strand made by the Restacked Rod Process, which can reach 12 T, 4.2 K J(c) values of 3000 A/mm(2), with high residual resistivity ratio (RRR) values. For purposes of accelerator magnet stability, it is desirable to combine high J(c) with a small effective filament diameter (D-eff). Initial experiments show reducing D-eff from 80 mu m to 40 mu m leads to a 10% reduction in J(c). For fusion applications, a single-barrier design with well-spaced filaments is used to achieve the low hysteresis losses that are required. The status of our fusion strand development program is presented, including results for strand made using Nb-47 wt%Ti rods to supply Ti dopant. Such strands can reach 12 T, 4.2 K J(c) > 1000 A/mm(2), with losses < 1000 mJ/cm(3).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available