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Erratum: A new benchmark problem for electromagnetic modelling of superconductors: The high-T<inf>c</inf> superconducting dynamo (Superconductor Science and Technology (2020) 33 (105009) DOI: 10.1088/1361-6668/abae04)

Ainslie, M and Grilli, F and Quéval, L and Pardo, E and Perez-Mendez, F and Mataira, R and Morandi, A and Ghabeli, A and Bumby, C and Brambilla, R (2021) Erratum: A new benchmark problem for electromagnetic modelling of superconductors: The high-T<inf>c</inf> superconducting dynamo (Superconductor Science and Technology (2020) 33 (105009) DOI: 10.1088/1361-6668/abae04). Superconductor Science and Technology, 34. ISSN 0953-2048

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Abstract

Since publication, we have realized that the results from the minimum electromagnetic entropy (MEMEP) method (see section 3.3 in the original paper [1]) used a different voltage definition, causing a slight discrepancy with the results obtained from the other methods in figures 3 and 4. Instead of V (t) = −LE (t), as given by equation (5) in [1], we used −∆V(t) as defined by equation (22) in [2]: ∆V ≈ L· [∂ A + E (J)] . Although both definitions result in the same DC voltage, the instantaneous signal differs, as shown in figure 1 in this corrigendum. Indeed, the used ∆V for the MEMEP method in [1] adds an extra contribution, ∂ A , the vector potential due to the superconducting current. As a result, the new curve has much better qualitative and quantitative agreement with the waveforms calculated by the other methods shown in figure 3 of the original article [1]. In the original article [1], we also used the −∆V(t) definition above instead of V (t) to calculate the cumulative time-averaged equivalent voltage, defined from equation (6) in [1] as t V (t) = V (t) dt. 0 The new results, using V (t) , present only small changes compared to the original calculations, as shown in figure 2 in this corrigendum. This curve also has very good qualitative and quantitative agreement with the waveforms calculated by the other methods, as shown in figure 4 in the original article [1]. The data related to the new calculations for this corrigendum are available at the University of Cambridge data repository (https://doi.org/10.17863/CAM.60437). eq ave t av,J ave t av,J eq cumul t eq eq 1

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 09 Dec 2020 20:29
Last Modified: 13 Apr 2021 08:44
DOI: 10.1088/1361-6668/abd522