NHMFL > ASC > PJL > Master Jc Plots and Nb3Sn Scaling Spreadsheet
The new official "Plots" page can now be found somewhere on the NHMFL web site. The location of the ASC page is not static so try finding the ASC web pages via the main NHMFL entrance at: http://www.magnet.fsu.edu or if you are lucky: http://www.magnet.fsu.edu/magnettechnology/research/asc/plots.html
Below is an enhanced version of the page that may be of use if you have difficulty finding the official version.
| A comparison of Superconductor Critical Currents |
| Engineering Critical Currents - May 2008
Includes more extensive annotations than previous versions as well as cross-sections of the composites.
1024x768 363 KB PNG
268 KB Powerpoint File |
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A Best-of-Breed Comparison of Superconductor Critical Currents for
100 m length capable material
Update History - Opens in a new window
Critical current density values are all normalized to the superconductor
cross-section and are in A/mm² (the units most commonly used for
magnet applications). The criterion used for determining critical
current measurement is not consistent, especially in the case of
HTS superconductors.
Edited
version of comparison between Bulk Pinning Force and Field of a
Superconductor
Advances in Critical Current Density in Nb-Ti Superconductors at
4.2
compiled the data and generated the graphs |
| Nb3Sn
Scaling Spreadsheet |
A set of empirical relations has been developed that have proven
to describe the critical surface of Nb3Sn superconductors
with very high accuracy. Typical standard deviations amount to 1
% for applied fields ranging from 1 to 13 T, temperatures ranging
from 4 K up to the critical temperature and the complete axial compressive
strain regime. This set of equations has been employed to develop
a Scaling Spreadsheet based on a Microsoft Excel Visual Basic programming
code that contains direct calculations of Ic, Bc2* and Tc values as function
of a limited set of input parameters. It enables the user to accurately
inter- or extrapolate data from a limited set of measured critical
current values for an unknown Nb3Sn strand material.
The code is "open source" so that the user has the opportunity
to modify the equations for his/her specific requirements.
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Created April 18 2002 ©Peter J. Lee