Speaker
Xuan Peng
(Hyper Tech Research Inc.)
Description
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 improve the non-Cu Jc further. In this paper, creating artificial pinning centers has been used to increase flux pinning in order to raise the Jc overall in the 12-20T range within the tube type Nb3Sn strands. As a result, the artificial pinning centers refine the grain size by at least half, thereby increasing the layer Jc by at least 20%. Round Nb filament has been made to improve the filament array in the restack conductor to increase the reacted Nb3Sn area thereby increasing the Jc in the strand.
Author
Xuan Peng
(Hyper Tech Research Inc.)
Co-authors
Matthew Rindfleisch
Mr
Michael Tomsic
(Hyper Tech Research Inc.)
Mike Sumption
(The Ohio State University)
Xingchen Xu
(the Ohio State University)
