Internal Tin ${\hbox {Nb}}_{3}{\hbox {Sn}}$ Conductors Engineered for Fusion and Particle Accelerator Applications

Autor:	N. Cheggour, Yibing Huang, L. Goodrich, Youzhu Zhang, Hanping Miao, M. Meinesz, Seung Hong, J.A. Parrell, Michael Field
Rok vydání:	2009
Předmět:	Materials science Dopant Niobium chemistry.chemical_element Superconducting magnet Fusion power Condensed Matter Physics Magnetic hysteresis Rod Electronic Optical and Magnetic Materials chemistry Magnet Electrical and Electronic Engineering Composite material Tin
Zdroj:	IEEE Transactions on Applied Superconductivity. 19:2573-2579
ISSN:	1558-2515 1051-8223
DOI:	10.1109/tasc.2009.2018074
Popis:	The critical current density (Jc) of Nb3Sn strand has been significantly improved over the last several years. For most magnet applications, high Jc internal tin has displaced bronze process strand. The highest Jc values are obtained from distributed barrier strands. We have continued development of strands made with Nb-47 wt%Ti rods to supply the dopant, and have achieved Jc values of 3000 A/mm2 (12 T, 4.2 K). Such wires have very good higher field performance as well, reaching 1700 A/mm2 at 15 T. To reduce the effective filament diameter in these high Jc strands, the number of subelement rods incorporated into the final restack billet has been increased to 127 in routine production, and results are presented on experimental 217 stacks. A new re-extrusion technique for improving the monofilament shape is also described. For fusion applications such as ITER, we have developed single-barrier internal tin strands having non-Cu Jc values over 1100 A/mm2 (12 T, 4.2 K) with hysteresis losses less than 700 mJ/cm3 over non-Cu volume. The Jc-strain behavior of such composites is also presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d94560e402d4b3c5409a775f688623f7 https://doi.org/10.1109/tasc.2009.2018074 Zobrazit plný text záznamu