Open AccessНеравновесные состояния в ВТСП-композитах второго поколения при сверхкритических импульсных токовых воздействиях
Author(s) -
И.В. Анищенко,
С.В. Покровский,
М.А. Осипов,
Д. А. Абин,
Д.И. Грицаенко,
И.А. Руднев
Publication year - 2021
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2021.19.51508.18828
Subject(s) - materials science , superconductivity , microsecond , amplitude , resistive touchscreen , finite element method , composite number , current (fluid) , supercritical fluid , electrical engineering , condensed matter physics , composite material , physics , structural engineering , engineering , optics , thermodynamics
This paper presents the results of studying the processes of еру HTS composites switching from the superconducting to the resistive state at microsecond current pulses. Two modes of pulsed current load were used: with an amplitude of ~ 1.1 Ic (the so-called "soft" mode) and with an amplitude of ~ 3 Ic ("hard" mode). The possibility of passing supercritical currents through the tape without superconductor characteristics degradation is shown. To explain the processes occurring in the tape during the current pulse, 2D FEA (finite element analyzes) was developed, with the help of which the dynamic resistance of the HTS composite superconducting layer was calculated in the "hard" load mode and nonstationary processes of current redistribution between the different tape layers were demonstrated.