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Applied Superconductivity and Magnetism
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Applied Superconductivity and Magnetism

A special issue of J (ISSN 2571-8800). This special issue belongs to the section "Physical Sciences".

Deadline for manuscript submissions: closed (15 October 2021) | Viewed by 5221

Special Issue Editors

Prof. Dr. Vladimir R. Romanovskii

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Guest Editor
National Research Center Kurchatov Institute, Moscow, Russia
Interests: applied superconductivity; mesoscopic physics; low and high superconductors; macroscopic electrodynamics; quench
Prof. Dr. Igor A. Rudnev

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Guest Editor
National Research Nuclear University MEPhI, Moscow, Russia
Interests: magnetism; superconductivity; applied superconductivity; mesoscopic physics; vortex theory; correlation effects; heavy ion and gamma-irradiations

Special Issue Information

Dear Colleagues,

One of the most important areas of modern scientific research is condensed matter physics. This Special Issue shall focus on research in the important areas of this direction, namely magnetism and applied superconductivity, which involve the coexistence of superconductivity, magnetism, and/or spin–orbit coupling in both materials and in mesoscopic physics devices. The most important applications of superconductivity relate to large-scale magnet technology. The use of superconductivity in such devices produces tremendous benefits. These require the continuous development of superconductors from both fundamental and practical points of view. The topics include discussion of characteristic properties (magnetic, flux pinning, and so on) of conventional and novel superconductors and applications of superconductivity for different purposes. We urge you to present new results in superconducting technologies that will spark a discussion around how they can be used to drive innovation in superconductivity and also magnetism theory, which is inextricably linked to the theory of superconductivity.

This Special Issue aims at promoting original and high-quality papers on superconductivity from a multidisciplinary perspective. In particular, the Guest Editors will consider papers on superconductivity and magnetism. The issue also welcomes papers on classical topics.

We cordially invite you to submit a high-quality original research papers or reviews to this Special Issue, “Applied Superconductivity and Magnetism”.

Prof. Dr. Vladimir R. Romanovskii
Prof. Dr. Igor A. Rudnev
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. J is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetism
  • superconductivity
  • susceptibility
  • flux pinning
  • vortices theory
  • applied superconductivity
  • applications
  • losses
  • macroscopic electrodynamics

Published Papers (3 papers)

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Editorial

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2 pages, 150 KiB  
Editorial
Applied Superconductivity and Magnetism
by Vladimir R. Romanovskii and Igor A. Rudnev
J 2021, 4(2), 82-83; https://doi.org/10.3390/j4020006 - 31 Mar 2021
Viewed by 1591
Abstract
A magnetic field, which is one of the more important physical parameters, allows the properties of materials to change [...] Full article
(This article belongs to the Special Issue Applied Superconductivity and Magnetism)

Research

Jump to: Editorial

16 pages, 3696 KiB  
Article
Analysis of High-Temperature Superconducting Current Leads: Multiple Solutions, Thermal Runaway, and Protection
by Rizos N. Krikkis
J 2023, 6(2), 302-317; https://doi.org/10.3390/j6020022 - 31 May 2023
Viewed by 1017
Abstract
The multiple steady states of Ag/Bi2212-composite high-Tc superconducting leads modeling current delivery to a superconducting magnet have been numerically calculated. The model is based on longitudinal conduction combined with convective heat dissipation from a helium gas stream along the conductor. Because [...] Read more.
The multiple steady states of Ag/Bi2212-composite high-Tc superconducting leads modeling current delivery to a superconducting magnet have been numerically calculated. The model is based on longitudinal conduction combined with convective heat dissipation from a helium gas stream along the conductor. Because of the nonlinearities introduced by the voltage–current relationship and the temperature-dependent material properties, up to three solutions have been identified within the range of parameters considered. Linear stability analysis reveals that two of them are stable, i.e., the superconducting and the normal branches, while the remaining one is unstable. The limit points separating the stable from the unstable steady states form the blow-up threshold, beyond which any further increase in the operating current results in a thermal runway. Interesting findings are that for low filling ratios no bounded solution exists when the length of the lead exceeds the lower limit point, while very high maximum temperatures may be encountered along the normal solution branch. The effect of various parameters such as the conduction–convection parameter, the applied current, and the reduction in coolant flow (LOFA) on the bifurcation structure and their stabilization effect on the blow-up threshold are also evaluated. Apart from the steady and unsteady operating modes, the multiplicity analysis is also used to identify the range of the design and operating variables where safe operation, with a sufficient margin from the onset of instabilities, may be established, thus facilitating the protection of the leads and the device connected to it. Full article
(This article belongs to the Special Issue Applied Superconductivity and Magnetism)
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21 pages, 4037 KiB  
Article
On the Thermal Dynamics of Metallic and Superconducting Wires. Bifurcations, Quench, the Destruction of Bistability and Temperature Blowup
by Rizos N. Krikkis
J 2021, 4(4), 803-823; https://doi.org/10.3390/j4040055 - 22 Nov 2021
Viewed by 1904
Abstract
In the present study, a numerical bifurcation analysis is carried out in order to investigate the multiplicity and the thermal runaway features of metallic and superconducting wires in a unified framework. The analysis reveals that the electrical resistance, combined with the boiling curve, [...] Read more.
In the present study, a numerical bifurcation analysis is carried out in order to investigate the multiplicity and the thermal runaway features of metallic and superconducting wires in a unified framework. The analysis reveals that the electrical resistance, combined with the boiling curve, are the dominant factors shaping the conditions of bistability—which result in a quenching process—and the conditions of multistability—which may lead to a temperature blowup in the wire. An interesting finding of the theoretical analysis is that, for the case of multistability, there are two ways that a thermal runaway may be triggered. One is associated with a high current value (“normal” runaway) whereas the other one is associated with a lower current value (“premature” runaway), as has been experimentally observed with certain types of superconducting magnets. Moreover, the results of the bifurcation analysis suggest that a static criterion of a warm or a cold thermal wave propagation may be established based on the limit points obtained. Full article
(This article belongs to the Special Issue Applied Superconductivity and Magnetism)
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