J
Jorma Lehtonen
Researcher at Tampere University of Technology
Publications - 67
Citations - 782
Jorma Lehtonen is an academic researcher from Tampere University of Technology. The author has contributed to research in topics: Magnet & Electromagnetic coil. The author has an hindex of 16, co-authored 67 publications receiving 763 citations.
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Self-field reduces critical current density in thick YBCO layers
TL;DR: In this article, the influence of self-field on the average critical current density is studied computationally as a function of film thickness, and the situation is also scrutinized at different external magnetic fields in order to find ways to distinguish selffield effects from problems related to the manufacturing process.
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How to determine critical current density in YBCO tapes from voltage–current measurements at low magnetic fields
TL;DR: In this article, an optimization method to determine the magnetic field dependence of the intrinsic critical current density, Jc(B), is introduced, where the self-field of the sample is taken into account and thereby measurements performed in low external magnetic fields, below 0.1 T, can be exploited.
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A numerical model for stability considerations in HTS magnets
TL;DR: In this paper, the authors present a computational model based on the heat conduction equation coupled with Maxwell's equations, whereby analysis can be performed by using commercial software packages for computational electromagnetics and thermodynamics.
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Environmental advantages of superconducting devices in distributed electricity-generation
TL;DR: In this paper, the authors focused on the environmental benefits of superconducting machinery by comparing suitable devices with their competitors in DG-networks and proposed a commercialization schedule for HTS-cables and an unconventional concept for a DG-network.
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Effective thermal conductivity in HTS coils
TL;DR: In this article, the authors presented a numerical model to determine the effective thermal conductivity in high-T c superconducting (HTS) coils, based on the heat conduction equation solved with the finite element method.