ANALYSIS OF CHANGES IN THE CURRENT-CARRYING CAPACITY OF SECOND-GENERATION HTS TAPES AFTER APPLYING A COMPRESSIVE MECHANICAL LOAD

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Abstract

Currently, projects of large-scale magnetic systems based on second-generation high-temperature superconductors (HTS) are actively being developed all over the world. Significant mechanical stresses occur during the production and operation of conductive elements, which can adversely affect the conductivity. In this study, an analysis was conducted on the changes in conductivity of HTS tapes with various architectures
after applying compressive mechanical loads at room temperature. The HTS tapes produced at S-Innovations and those manufactured on the Kurchatov Institute's production line were used for investigation. It was shown that additional coating of HTS tape with POS-61 solder (Sn61/Pb39) lead to a decrease in conductivity at lower compressive mechanical loads compared to non-coated samples. It was also found
that compressive loads of 50 MPa led to a significant increase in longitudinal inhomogeneity and local increase in critical current above values in original tape. Comparative analysis of critical currents obtained
using transport method and calculated from Hall magnetometry data was carried out. Results obtained by these complementary methods were consistent for all samples if exponential form of local volt-ampere
characteristic was assumed.

About the authors

Ilya Ivanovich Preobrazhenskiy

NRC “Kurchatov Institute”;
Lomonosov Moscow State University

Author for correspondence.
Email: preo.ilya@yandex.ru
ORCID iD: 0000-0003-2352-6745
Scopus Author ID: 58094092300
ResearcherId: IXN-8315-2023
Russian Federation, Moscow, 123098 Russia; Moscow, 119991 Russia

Valentin V. Guryev

NRC “Kurchatov Institute”

Email: Gurev_VV@nrcki.ru
Russian Federation, Moscow, 123098 Russia

Dmitry N. Diev

NRC “Kurchatov Institute”

Email: dndiev@gmail.com
Russian Federation, Moscow, 123098 Russia

Andrey V. Naumov

NRC “Kurchatov Institute”

Email: naumovandrej.isssph@yandex.ru
Russian Federation, Moscow, 123098 Russia

Alexey V. Polyakov

NRC “Kurchatov Institute”

Email: alxadress@gmail.com
Russian Federation, Moscow, 123098 Russia

Kirill V. Moseev

NRC “Kurchatov Institute”

Email: kirit@yandex.ru
Russian Federation, Moscow, 123098 Russia

Marina N. Makarenko

NRC “Kurchatov Institute”

Email: makarenko_MN@rrcki.ru
Russian Federation, Moscow, 123098 Russia

Sergey V. Shavkin

NRC “Kurchatov Institute”

Email: shavkin_SV@nrcki.ru
Russian Federation, Moscow, 123098 Russia

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