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June
27, 1996 version: Much smaller (by request), new Hitachi Nb3Al,
VAC-HP bronze Nb3Sn and improved AmSC 2223.
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June 28, 1996 for improved clarity of legend.
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July 2, 1996 for ECN-PIT Nb3Sn (low cable degradation strand). And
WMF files added for better clarity.
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September 12, 1996.
Added labels, reversed colors, improved legend. Please email me
to request more ecologically correct white background version.
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October 7, 1996 corrected Yale thin-film labels.
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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.
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September 29, 1997.
Added Chevrel Phase data and corrected some symbol errors in the
light version.
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November 21, 1997.
Extended Nb3Al data down to 14 T. Does anyone have
any lower field data?
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March 25, 1998.
1.8 K Nb-Ti data added.
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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
for more information.
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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.
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September 9, 1999.
Some misidentification on graph corrected (no change to data or
legend).
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April 5, 2000.
Latest generation of SMI-PIT Nb3Sn strand replaces
earlier data.
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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.
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July 10, 2001.
Added MgB2 thin film data
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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.
-
. . . . . . sorry
. . . gap in notes . . I will try and fix this when I have time
. . .
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2006 MgB2 data updated
for Grasso et al. presentation at MEM'06 meeting and Hypertech
data from Supercond. Sci. Technol. 19 (2006) 155–160.
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2006 MgB2 progress
plot added. Includes UW data from Senkowicz and GE wires and tapes
measured at UW by Jianyi Jiang.
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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.
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