DOI: 10.1063/1.324621. Dynamic stress effects in technical superconductors and the ’’training’’ problem of superconducting magnets

Dynamic stress effects in technical superconductors and the ’’training’’ problem of superconducting magnets

10.1063/1.324621

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

The behavior of NbTi superconductors under dynamic mechanical stress was investigated. A training effect was found in short-sample tests when the conductor was strained in a magnetic field and with a transport current applied. Possible mechanisms are discussed which were proposed to explain training in short samples and in magnets. A stress-induced microplastic as well as an incomplete pseudoelastic behavior of NbTi was detected by monitoring acoustic emission. The experiments support the hypothesis that microplastic or shape memory effects in NbTi involving dislocation processes are responsible for training. The minimum energy needed to induce a normal transition in short-sample tests is calculated with a computer program, which gives the exact solution of the heat equation. A prestrain treatment of the conductor at room temperature is shown to be a simple method of reducing training of short samples and of magnets. This is a direct proof that the same mechanisms are involved in both cases.

Bibliography

Pasztor, G., & Schmidt, C. (1978). Dynamic stress effects in technical superconductors and the ââtrainingââ problem of superconducting magnets. Journal of Applied Physics, 49(2), 886â899.

Authors 2

G. Pasztor (first)
C. Schmidt (additional)

References 62 Referenced 81

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{'key': '2024020420201502500_r3', 'first-page': '1561', 'volume': '3', 'year': '1970', 'journal-title': 'J. Phys. D'} / J. Phys. D (1970)
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Dates

Type	When
Created	22 years, 6 months ago (Feb. 14, 2003, 4:46 p.m.)
Deposited	1 year, 6 months ago (Feb. 4, 2024, 3:20 p.m.)
Indexed	1 week, 1 day ago (Aug. 23, 2025, 9:55 p.m.)
Issued	47 years, 7 months ago (Feb. 1, 1978)
Published	47 years, 7 months ago (Feb. 1, 1978)
Published Print	47 years, 7 months ago (Feb. 1, 1978)

Funders 0

None

BibTeX

@article{Pasztor_1978, title={Dynamic stress effects in technical superconductors and the ’’training’’ problem of superconducting magnets}, volume={49}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.324621}, DOI={10.1063/1.324621}, number={2}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Pasztor, G. and Schmidt, C.}, year={1978}, month=feb, pages={886–899} }

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