IMPROVED SUPERCONDUCTING CRITICAL-CURRENT DENSITY IN MODIFIED JELLY ROLL NB3SN BY THE APPLICATION OF NIOBIUM (NB) DIFFUSION-BARRIERS

Authors
MCKINNELL JC SMATHERS DB SIDDALL MB OLAREY PM
Citation
Jc. Mckinnell et al., IMPROVED SUPERCONDUCTING CRITICAL-CURRENT DENSITY IN MODIFIED JELLY ROLL NB3SN BY THE APPLICATION OF NIOBIUM (NB) DIFFUSION-BARRIERS, IEEE transactions on applied superconductivity, 5(2), 1995, pp. 1768-1772
Citations number
13
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on applied superconductivity → ACNP
ISSN journal
10518223
Volume
5
Issue
2
Year of publication
1995
Part
2
Pages
1768 - 1772
Database
ISI
SICI code
1051-8223(1995)5:2<1768:ISCDIM>2.0.ZU;2-4
Abstract
One of the limiting factors of high field magnets is the overall curre nt density available in the high field region. We report a 40% increas e in the critical current density of the non-Cu of Modified Jelly Roll (MJR) Nb3Sn wires. The increase occurs when niobium diffusion barrier s are substituted for the standard vanadium diffusion barriers. The Nb 3Sn J(c) is also shown to increase when vanadium is removed from the w ire. The effective filament diameter of the wire increases only slight ly and depends linearly on the MJR diameter. Niobium diffusion barrier s are found to improve the RRR of the wire relative to vanadium diffus ion barriers.