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
	Light Color Version - June 2008 1078x636 142 KB PNG 183 KB Powerpoint File

A Best-of-Breed Comparison of Superconductor Critical Currents for 100 m length capable material

Light Version - December 12, 2002 66 KB PDF US Letter 66 KB PDF A4 Size 121 KB Powerpoint 75 KB GIF 1200 X 900 x 16 col

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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

200 KB PDF Updated February 24th 2003

Advances in Critical Current Density in Nb-Ti Superconductors at 4.2

59 KB PDF

compiled the data and generated the graphs

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 I_c, B_c2* and T_c 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.

	Spreadsheet - October 25, 2005 74 KB Scaling Spreadsheet: Excel Format 24 KB Zip compressed file containing Excel spreadsheet
	References - Arno Godeke thesis at http://www.asc.wisc.edu/publications/pdfthesesnew.htm and http://lt.tnw.utwente.nl Performance Boundaries in Nb3Sn Superconductors: Arno Godeke - 2005 (9.8MB)

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