Effect of Neutron Irradiation on Critical Currents of REBaCuO Superconducting Tapes Considered for Magnets in Fusion Reactors

Critical currents Ic of several commercial REBaCuO superconducting tapes, prepared by various producers, were tested inductively (vibrating sample magnetometer in magnetic fields up to 9 T). Measurements were performed before and after neutron irradiation. Irradiation was conducted in the LVR-15 fis...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2018-06, Vol.28 (4), p.1-5
Main Authors: Jirsa, Milos, Rames, Michal, Duran, Ivan, Viererbl, Ladislav
Format: Article
Language:English
Subjects:
Critical current density
Critical current density (superconductivity)
Current measurement
flux pinning
Integrated circuits
Magnetometers
neutron irradiation
Neutrons
Radiation effects
superconducting filaments and wires
Superconducting magnets
type II superconductors
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Summary:Critical currents Ic of several commercial REBaCuO superconducting tapes, prepared by various producers, were tested inductively (vibrating sample magnetometer in magnetic fields up to 9 T). Measurements were performed before and after neutron irradiation. Irradiation was conducted in the LVR-15 fission reactor at the Research Centre q̌ež with doses of 1 × 10 22 m -2 and 2.1 × 10 22 m -2 . After irradiation, we observed a slight decrease in Ic around the self-field in all tapes. At higher magnetic fields, neutron irradiation caused a large variation in Ic, with some tapes showing a strong enhancement, some tapes showing a moderate effect, whilst no effect or even an Ic degradation appeared in the remainder. The irradiation effect depended on the pinning medium, measurement temperature, and magnetic field.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2018.2804163