<div class="csl-bib-body">
<div class="csl-entry">Unterrainer, R. N., Gambino, D., Bodenseher, A., Semper, F., Torsello, D., Laviano, F., & Eisterer, M. (2023, November 14). <i>Impact of neutron induced ex-situ defects on the properties of CCs and their thermal stability</i> [Conference Presentation]. IREF 2023 - Irradiation Effects on HTS for Fusion, Arona, Italy, Italy. https://doi.org/10.34726/5456</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/193858
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dc.identifier.uri
https://doi.org/10.34726/5456
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dc.description.abstract
Fusion will produce high energy neutrons at 14 MeV, which, with a broadened spectrum due to scattering, will introduce various defects into the conductor of the superconducting magnets. The lifetime of the coils will mainly be restricted by the neutron flux and thus their distance to the burning plasma. While the price of energy output by large reactor designs will mainly be defined by the price of
the initial construction, the expected short lifetime of superconducting magnets might drive the cost in small designs as e.g. SPARC and STEP. Since the price of energy needs to be competitive in order for fusion to be economically feasible, mitigation strategies have to be developed. This however, requires a deep understanding of the underlying degradation processes.
Samples based on commercial coated conductors containing YBCO and GdBCO were irradiated with neutrons at approximately 70 °C in our fission reactor TRIGA MARK II to introduce comparable defects and study the behavior of the critical current, the n-value and the critical temperature. Samples containing GdBCO showed a fundamentally different degradation behavior, if irradiated with a neutron
spectrum containing particle energies below 0.55 eV. We attribute the behavior to the formation of a high density of almost point-like defects, induced by the high absorption cross section of Gadolinium to thermal neutrons. The Gadolinium nucleus enters an excited state after the absorption of a thermal
neutron. This state decays by the emission of a gamma particle that leads to the recoil of the Gd atom and in consequence to a high density of Oxygen defects. Data from molecular dynamics simulations indicate that, due to its position in the REBCO lattice, some of the formed defects are located in the Cu-O
plains, which could have a strong impact on the superconducting properties.
These very specific defects allow us to distinguish the influence of small versus large defective structures on the superconducting properties of REBCO. In further consequence fundamentally different defect structures are expected to be stable up to different temperatures enabling a study of the capability of heat treatments to recover neutron induced degradation
en
dc.description.sponsorship
European Commission
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dc.language.iso
en
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dc.rights.uri
http://creativecommons.org/licenses/by-nc-sa/4.0/
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dc.subject
high temperature superconductors
en
dc.subject
ybco
en
dc.subject
gdbco
en
dc.subject
coated conductors
en
dc.subject
fusion
en
dc.subject
neutron irradiation
en
dc.subject
frenkel pairs
en
dc.subject
radiation resistance
en
dc.title
Impact of neutron induced ex-situ defects on the properties of CCs and their thermal stability
en
dc.title.alternative
Impact of neutron induced ex-situ defects on the properties of coated conductors and their thermal stability
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.rights.license
Creative Commons Namensnennung - Nicht-kommerziell - Weitergabe unter gleichen Bedingungen 4.0 International
de
dc.rights.license
Creative Commons Attribution - NonCommercial-ShareAlike 4.0 International
en
dc.identifier.doi
10.34726/5456
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dc.contributor.affiliation
Linköping University, Sweden
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dc.contributor.affiliation
Polytechnic University of Turin, Italy
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dc.contributor.affiliation
Polytechnic University of Turin, Italy
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dc.relation.grantno
0000000000
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dc.type.category
Conference Presentation
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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.researchinfrastructure
TRIGA Mark II-Nuklearreaktor
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tuw.researchTopic.id
M7
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tuw.researchTopic.id
E6
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tuw.researchTopic.name
Special and Engineering Materials
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tuw.researchTopic.name
Sustainable Production and Technologies
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tuw.researchTopic.value
80
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tuw.researchTopic.value
20
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tuw.publication.orgunit
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
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tuw.author.orcid
0000-0002-7763-7224
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tuw.author.orcid
0000-0002-2959-1962
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tuw.author.orcid
0000-0001-9551-1716
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tuw.author.orcid
0000-0002-5271-6575
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tuw.author.orcid
0000-0002-7160-7331
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dc.rights.identifier
CC BY-NC-SA 4.0
de
dc.rights.identifier
CC BY-NC-SA 4.0
en
tuw.event.name
IREF 2023 - Irradiation Effects on HTS for Fusion
en
tuw.event.startdate
12-11-2023
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tuw.event.enddate
16-11-2023
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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
Arona, Italy
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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
Unterrainer, Raphael Nikolaus
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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.mimetype
application/pdf
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item.fulltext
with Fulltext
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item.openairetype
conference paper not in proceedings
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item.openaccessfulltext
Open Access
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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item.grantfulltext
open
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crisitem.project.funder
European Commission
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crisitem.project.grantno
0000000000
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crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
-
crisitem.author.dept
Linköping University
-
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
Polytechnic University of Turin
-
crisitem.author.dept
Polytechnic University of Turin
-
crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
