<div class="csl-bib-body">
<div class="csl-entry">Eisterer, M., Unterrainer, R., Bodenseher, A., Semper, F., Lehner, M., & Munier-Gondiant, G. (2023, April 5). <i>The role of small defects on the degradation of coated conductors in radiation environments</i> [Conference Presentation]. Coated Conductors for Applications Workshop 2023, Houston, United States of America (the). http://hdl.handle.net/20.500.12708/192771</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/192771
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dc.description.abstract
Magnets for fusion reactors and particle accelerators are promising applications for coated conductors. However, the superconductors will be exposed to high-energy neutrons during the operation of these magnets. Fast neutrons induce damage primarily by direct collisions with the lattice atoms that lead to a variety of defects, ranging from so-called collisions cascades with a diameter of a few nanometers down to single displaced atoms and the respective lattice strain. While the large defects are beneficial for the critical currents by serving as pinning centers, the small defects mainly enhance scattering of the charge carriers which is pair breaking in cuprate superconductors; thus reducing both, the transition temperature and the superfluid density. These competing effects lead to a maximum in the critical current as a function of neutron fluence. Unfortunately, the individual contributions of large and small defects cannot be resolved in fast neutron irradiation experiments. Gadolinium containing tapes offer this opportunity by an additional -low-energy neutron induced- point defect producing mechanism. Some Gadolinium isotopes absorb low energy neutrons and the recoil of the following emission of a high-energy phonon is sufficient to displace the respective nucleus. Our experiments show that simultaneous irradiation with low- and high-energy neutrons results in a much faster degradation than fast neutron irradiation. This difference can be ascribed to the small defects resulting from the neutron capture reactions. These results are complemented by data of annealing experiments, where defects are partly healed out and the superconducting properties recover. The superconducting transition temperature turns out to be a suitable parameter to monitor impurity scattering for a description of the degradation of the critical currents in radiation environments.
en
dc.description.sponsorship
European Commission
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dc.description.sponsorship
Österr. Akademie der Wissenschaften
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dc.language.iso
en
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dc.subject
critical currents
en
dc.subject
radiation damage
en
dc.subject
high temperature superconductors
en
dc.subject
coated conductors
en
dc.title
The role of small defects on the degradation of coated conductors in radiation environments
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
TU Wien, Austria
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dc.relation.grantno
2032036
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dc.relation.grantno
MG2021-3, MG2023-5
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dc.type.category
Conference Presentation
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tuw.publication.invited
invited
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tuw.project.title
High-temperature superconducting materials for fusion magnets. The partner project is KKKÖ ME
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tuw.project.title
Matching Grant zu EUROfusion ME
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tuw.researchTopic.id
M2
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tuw.researchTopic.id
E3
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tuw.researchTopic.id
M8
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Climate Neutral, Renewable and Conventional Energy Supply Systems
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tuw.researchTopic.name
Structure-Property Relationsship
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tuw.researchTopic.value
30
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tuw.researchTopic.value
30
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tuw.researchTopic.value
40
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tuw.publication.orgunit
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
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tuw.author.orcid
0000-0002-7160-7331
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tuw.author.orcid
0000-0002-8720-9004
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tuw.author.orcid
0000-0002-2959-1962
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tuw.author.orcid
0009-0003-6212-0657
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tuw.event.name
Coated Conductors for Applications Workshop 2023
en
tuw.event.startdate
03-04-2023
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tuw.event.enddate
06-04-2023
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Houston
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tuw.event.country
US
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tuw.event.presenter
Eisterer, Michael
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.cerifentitytype
Publications
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item.languageiso639-1
en
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item.fulltext
no Fulltext
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item.openairetype
conference paper not in proceedings
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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item.grantfulltext
none
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crisitem.project.funder
European Commission
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crisitem.project.funder
Österr. Akademie der Wissenschaften
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crisitem.project.grantno
0000000000
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crisitem.project.grantno
MG2021-3, MG2023-5
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crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
-
crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
-
crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
-
crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
-
crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity