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Exceptional structural and functional stability of Zr-doped REBaCuO tapes with respect to neutron irradiation and overheating
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SYSNO ASEP 0573334 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Exceptional structural and functional stability of Zr-doped REBaCuO tapes with respect to neutron irradiation and overheating Tvůrce(i) Jirsa, Miloš (UFP-V)
Rameš, M. (CZ)
Viererbl, L. (CZ)
Duchoň, J. (CZ)
Ďuran, Ivan (UFP-V) RID, ORCID
Entler, Slavomír (UFP-V) ORCIDCelkový počet autorů 6 Číslo článku 075005 Zdroj.dok. Superconductor Science and Technology. - : Institute of Physics Publishing - ISSN 0953-2048
Roč. 36, č. 7 (2023)Poč.str. 8 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova critical currents ; neutron irradiation ; radiation overheating ; second generation REBaCuO tapes ; superconducting materials Vědní obor RIV BM - Fyzika pevných látek a magnetismus Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) CEP LM2018096 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000995213900001 EID SCOPUS 85160518880 DOI 10.1088/1361-6668/acd229 Anotace The impact of neutron irradiation on the properties of second-generation REBaCuO tapes was studied. The main aim of the present study was to identify the fast neutrons irradiation fluence threshold, φ th, at which the high-field critical current at low temperatures, I c (10 K, 8 T), starts degrading. Following up on our previous publication for low irradiation fluences, two new irradiation steps were added. Up to the last but one irradiation step, the T c in all samples followed a linear dependence on the fast neutrons irradiation fluence, T c(φ) ≈ T c(0) − τφ (τ being a numerical constant in units of K/1022 m−2 and φ in 1022 m−2). In parallel, I c (10 K, 8 T) continuously grew with φ up to the threshold fluence, φ th ≈ 3× to 4.3 × 1022 m−2. The last gradual irradiation by φ≈ 1.83 × 1022 m−2 brought a severe degradation both in T c and I c (10 K, 8 T) in most samples, irrespective of their irradiation history. This effect was attributed to radiation overheating. Annealing of pristine tapes in dilute Ar confirmed this scenario. Two of the SuperPower tapes, doped by Zr, appeared to be exceptionally stable against both types of overheating. The tape doped with 7.5% Zr, T c(φ) followed the linear dependence up to the highest cumulative fluence φ =6.16 × 1022 m−2, while the I c (10 K, 8 T) drop was several orders of magnitude lower than in the samples without Zr. TEM study found that the Zr-doped tapes survived the overheating during the last irradiation step in a crystalline form, while all other samples were amorphized. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2024 Elektronická adresa https://iopscience.iop.org/article/10.1088/1361-6668/acd229
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