Increasing the Jc of Tube-Type Nb3Sn Strands
In this Phase I, we successfully made strands with better Cu/Sn ratio to reduce the coarse Nb3Sn grain region, thereby providing the potential of increasing the non-Cu Jc in the Phase II and scaling up to 2 billets with 331 subelements. In order to improve the strandÃ's high field properties, we successfully doped low amount of Ti in the subelements and made a 217-subelement wire which has been drawn down to 0.7 mm without any breakage. This strand gave subelement size of 35m. We will scale up the Ti-doped billet to 271-subelement in 1.5 billet in this proposed Phase II. The hexagonal shaped subelements with round Nb-Sn have been developed for a 61-subelement restack. Thus the results indicated that for 217-subelement restack in a billet we have the potential to draw down this type of construction without problems while maintaining a good array to react more Nb to get higher non-Cu Jc in the Phase II.
- Research Organization:
- Hyper Tech Research, Inc
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- SC0006254
- OSTI ID:
- 1057446
- Report Number(s):
- DOE/SC0006254-1; 1079 Final Report
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reduce Nb3Sn Strand Deformation when Fabricating High Jc Rutherford Cables
Develop Nb3Sn Strands for Advanced Fusion Application with High Jc at High Field and Low AC Loss