CUED Publications database

N-Values of commercial YBCO tapes before and after irradiation by fast neutrons

Chudy, M and Zhong, Z and Eisterer, M and Coombs, T (2015) N-Values of commercial YBCO tapes before and after irradiation by fast neutrons. Superconductor Science and Technology, 28. ISSN 0953-2048

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� 2015 IOP Publishing Ltd. The n-value is an important superconducting parameter, which represents the homogeneity of characterized superconductor as well as thermally activated depinning. In addition, n-values are important for the evaluation of pinning mechanisms and pinning forces. n-values are crucial input parameters for the numerical simulations of superconducting tapes, coils and other complicated superconducting applications where E-J power law applies. In this publication, complex measurement data of n-values from different 2nd generation of high temperature superconducting (2G HTS) tapes are presented and analysed. In addition, 2G HTS tapes were step-by-step irradiated by fast neutron fluences up to 1�10 22 m -2 . n-values of the irradiated tapes, containing additional randomly distributed pinning centres, are presented, analysed and compared with unirradiated samples. Special attention is placed on the underlying physics resulting in the power-law part of the I-V curve and on the correlation between critical currents and n-values. The measurements are performed within the temperature range of 50-85 K and magnetic fields up to 15 T.

Item Type: Article
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:42
Last Modified: 21 Jun 2018 02:28