Update History of J_c Plots

1. June 27, 1996 version: Much smaller (by request), new Hitachi Nb₃Al, VAC-HP bronze Nb₃Sn and improved AmSC 2223.
2. June 28, 1996 for improved clarity of legend.
3. July 2, 1996 for ECN-PIT Nb₃Sn (low cable degradation strand). And WMF files added for better clarity.
4. September 12, 1996. Added labels, reversed colors, improved legend. Please email me to request more ecologically correct white background version.
5. October 7, 1996 corrected Yale thin-film labels.
6. December 27, 1996 - January 3, 1997. Added Intermediate Powder route high-field Nb₃Sn (Tachikawa et al.) and 1.8 K Nb-Ti-Ta data. Further improvements to legend. Acrobat version available. Added dark symbols on white background version. Changed over to interlaced GIF format for smaller file size and a more entertaining load.
7. September 29, 1997. Added Chevrel Phase data and corrected some symbol errors in the light version.
8. November 21, 1997. Extended Nb₃Al data down to 14 T. Does anyone have any lower field data?
9. March 25, 1998. 1.8 K Nb-Ti data added.
10. March 31, 1999. NRIM Nb₃Al data from ASC'98 added.
    PAIR process Bi-2212 data point added.
    Nb-Ti(Fe)large scale production point added.
    High Jc Internal Sn data added from OI-STG ASC'98 paper.
11. April 29, 1999. Old Nb₃Sn ECN-PIT data replaced by new SMI-PIT data, the technology now being developed by ShapeMetal Innovation BV, a spin-off from the University of Twente. The data shown is from two sources, the 14-15.5 T measurements were performed by the University of Twente (NL) and the 17-25.5 T measurements are from the NHFML. Both sets of data used a criterion of 10 µV/m with a Ti-holder. In addition to the 36 filament wire shown a 504 filament (0.9 mm dia.) strand has been measured to 2106 A/mm² (non-Cu) at 11 T (data not shown here). Contact J. H. Lindenhovius for more information.
12. August 2, 1999. Replaced Intermediate Powder route high-field Nb₃Sn (Tachikawa et al.) of 1996 with latest data from same author presented at ICMC-CEC'99. A remarkable non-Cu Jc of 1.2×104A/cm² at 23 T was obtained by this material at 4.2 K. Jc for the A-15 core only is shown in the plot.
13. September 9, 1999. Some misidentification on graph corrected (no change to data or legend).
14. April 5, 2000. Latest generation of SMI-PIT Nb₃Sn strand replaces earlier data.
15. October 4, 2000. Added high field bronze processed Nb₃Sn strand (courtesy Manfred Thöner, Vacuumschmelze) and DRHQ processed Nb₃Al reported at ASC2000 (Kikuchi et al. NRIM). Expanded field range and Jc range.
16. August 13th, 2001. Added OI-ST (Parrell et al. ASC 2002 Paper 5MJ01) Internal Sn RRP "High Sn - High Jc" data. This strand achieves 2900 A/mm² at 12 T, 4.2 K.
17. . . . . . . sorry . . . gap in notes . . I will try and fix this when I have time . . .
18. 2006 MgB2 data updated for Grasso et al. presentation at MEM'06 meeting and Hypertech data from Supercond. Sci. Technol. 19 (2006) 155–160.
19. 2006 MgB2 progress plot added. Includes UW data from Senkowicz and GE wires and tapes measured at UW by Jianyi Jiang.
20. 2006 Very large scale Nb-Ti production data updated by using LHC maximum Jc data compilation data courtesy of Thierry Boutoul. This is in addition to data reported in T. Boutboul et al., "Critical current density in SC Nb-Ti strands in the 100 mT to 11 T applied field range," IEEE Trans. Appl. Supercond., vol. 16, no 2, June 2006.

For more information contact Peter Lee.