Testing of superconducting cables and joints needs extreme high currents and substantial space. Up to 20 kA DC current is available from one of the power supplies normally used for resistive magnets. Testing is possible in cell 16 in wide-bore superconducting magnets. Power supplies with smaller currents from a few A to several kA are also available for critical current characterization in smaller conductor samples and test coils. Cell 7 with a 52/39 mm warm/cold bore 31 tesla magnet is often used for such measurements. If higher field homogeneity is required, Cell 6 with a 52/39 mm warm/cold bore 25 tesla magnet can be used. Critical supercurrent up to 100 mA-1 A in thin films and single crystals can be measured in other systems, including the top-loaded 31 Tesla 3He system & VTI and 35 Tesla 3He system & VTI.
Images & Sample Data
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Probe for angular critical current measurements.
Probe for angular critical current measurements.
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Critical current vs. angle.
Critical current vs. angle.
https://nationalmaglab.org/user-facilities/dc-field/dcfield-techniques/high-current-measurements-dc#sigProId7883893cb9
Instrumentation
Resistive Magnets
- Resistive magnet DC power supply
- Different DC power supplies (e.g. 1 A, 200 A, 1.4 kA, 8 kA)
- High current probes for cables (up to 20 kA)
- High current probe (up to 500 A) with rotator, sample length 27 mm
- High current straight probe (up to 1500 A) , sample length 36 mm
Related Publications
Abraimov, D., et al, Double disordered YBCO coated conductors of industrial scale: high currents in high magnetic field, Superconductor Science and Technology, 28 (2015) Read online
Durrell, J.H., et al, A trapped field of 17.6 T in melt-processed, bulk Gd-Ba-Cu-O reinforced with shrink-fit steel, Superconductor Science and Technology, 27 (2014) Read online
Xu, A., et al, Strongly enhanced vortex pinning from 4 to 77 K in magnetic fields up to 31 T in 15 mol.% Zr-added (Gd, Y)-Ba-Cu-O superconducting tapes, APL Materials, 2 (2014) Read online
Lu, J., et al, Field Angular Dependence of Hysteresis Losses of Coated Conductor for High Field Magnets, IEEE Trans. Appl. Supercond., 23 (2013) Read online
Si, W., et al, High current superconductivity in FeSe0.5Te0.5-coated conductors at 30 tesla, Nature Communications, 4 (2013) Read online
Xu, A., et al, Angular dependence of Jc of YBCO coated conductors at low temperature and very high magnetic fields, Superconductor Science and Technology, 23 (2010) Read online
Godeke, A., et al, A superconducting transformer system for high current cable testing, Rev. Sci. Instrum., 81 (2010) Read online