<div class="csl-bib-body">
<div class="csl-entry">Bodenseher, A., Hackl, D., Unterrainer, R., & Eisterer, M. (2025, June 19). <i>Defect annealing experiments on neutron irradiated coated conductors: Identifying harmful defects and optimizing heat treatments for performance recovery</i> [Conference Presentation]. IRradiation Effects on HTS for Fusion (IREF), Gallipoli, Italy. http://hdl.handle.net/20.500.12708/216640</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/216640
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dc.description.abstract
Neutrons produced by nuclear fusion reactions introduce defects into the superconductors in the magnet system. This limits the lifetime of the magnet system, impeding economic viability. One approach to mitigate this effect is to increase the size of the reactor and strategically place shielding material in especially affected areas. Another one is thermally treating the magnet system during maintenance windows. The reported recovery with annealing [1], motivates further study into the interplay between the superconducting properties and specific defects and recovery of the former.
Samples based on commercial coated conductors were pre-characterized and then irradiated with neutrons in a TRIGA Mark II reasearch reactor until the critical current degraded beyond the initial pristine value -- also referred as crossover disorder -- corresponding to a decrease of the critical temperature of up to \qty{8}{\kelvin}. In order to measure the resistance of the REBCO layer, the silver stabilizing layer was removed by chemical etching between the voltage contacts.
The samples were then subjected to thermal treatment in pure oxygen atmosphere and two annealing procedures were devised. Isothermal annealing, where the annealing time was increased step by step, until no recovery of the critical temperature and critical current was observed. Additionally, continuous temperature sweeps up to \qty{400}{\celsius} were conducted on the etched samples during which the resistivity was measured in situ.
This study compares features in the temperature dependence of the resistivity to predicted defect formation/recombination energies and mobilities. The respective recovery of the critical temperature are utilized in order to identify the defect species that are particularly harmful for the superconducting properties.
Building on these results, we present the capabilities of neutron irradiated high temperature superconductors to recover, possibly extending the life of future compact fusion devices, which is an important foundation for the future design of fusion reactors.
[1] Raphael Unterrainer et al 2022 Supercond. Sci. Technol. 35 04LT01
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
superconductivity
en
dc.subject
high temperature superconductors
en
dc.subject
coated conductors
en
dc.subject
fusion
en
dc.subject
neutron irradiation
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dc.subject
neutron defects
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dc.title
Defect annealing experiments on neutron irradiated coated conductors: Identifying harmful defects and optimizing heat treatments for performance recovery
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
TU Wien, Austria
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dc.relation.grantno
0000000000
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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.researchinfrastructure
TRIGA Mark II-Nuklearreaktor
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tuw.researchTopic.id
M7
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tuw.researchTopic.id
M2
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tuw.researchTopic.id
M8
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tuw.researchTopic.name
Special and Engineering Materials
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Structure-Property Relationsship
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tuw.researchTopic.value
34
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tuw.researchTopic.value
33
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tuw.researchTopic.value
33
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tuw.publication.orgunit
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
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tuw.author.orcid
0000-0002-2959-1962
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tuw.author.orcid
0000-0002-8720-9004
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tuw.author.orcid
0000-0002-7160-7331
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tuw.event.name
IRradiation Effects on HTS for Fusion (IREF)
en
tuw.event.startdate
17-06-2025
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tuw.event.enddate
22-06-2025
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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
Gallipoli
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tuw.event.country
IT
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tuw.event.institution
Politecnico di Torino
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tuw.event.presenter
Bodenseher, Alexander
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tuw.event.track
Single Track
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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
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crisitem.author.dept
TU Wien
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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
