In-situ measurements of the effect of radiation damage on the superconducting properties of coated conductors
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An apparatus has been built to perform irradiation and electrical testing of REBCO coated conductors (CC) held below their critical temperature (T c). Patterned tracks of Fujikura GdBCO CC were irradiated with 2 MeV He+ ions in steps up to 4 mdpa whilst held at 40 K, and the critical current density (J c) determined from I–V characteristics. These ‘in-situ’ samples then underwent annealing experiments at room temperature. The superconducting performance, both before and after room temperature annealing, has been compared to equivalent samples irradiated at room temperature and then cooled for testing at 40 K to understand how the damage tolerance of these materials is affected by sample temperature. Details of the apparatus and experimental results from preliminary work are presented and discussed. These preliminary results show that both T c and J c values of patterned tracks degrade with irradiation dose, with most samples showing similar behaviour. The room temperature annealing of ‘in-situ’ irradiated samples resulted in a significant recovery of properties. We conclude that irradiation temperature does alter how the superconducting properties of GdBCO CC are affected by ion irradiation, and that this observation has implications for the design of high temperature superconducting magnets for future fusion reactors.
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The expected cumulative radiation dose that REBCO can withstand over its operational lifetime in fusion magnets is greater than 4 mdpa.
“This threshold is especially relevant because it is the expected cumulative radiation dose that rare-earth barium copper oxide (REBCO)-the primary constituent of hightemperature superconducting (HTS)-can withstand over their operational lifetime in fusion magnets [4].”
From A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation (2025) · cites this paper as [4]
The Abstract reports irradiation of GdBCO coated conductors up to 4 mdpa, and the Introduction identifies REBCO as a material for fusion magnets. Neither passage establishes that REBCO can withstand more than 4 mdpa over a magnet’s operational lifetime. The Conclusions say further work is needed to understand the practical implications for fusion magnets. (LLM, conf=0.85)
Experimental — accuracy not yet measuredThe relevant literature has primarily focused on the electrical properties of magnet materials, leaving a notable gap in the understanding of thermo-mechanical property evolution under FPP operating conditions.
“The relevant literature has primarily focused on the electrical properties of magnet materials [3, 4, 5], leaving a notable gap in the understanding of thermo-mechanical property evolution under FPP operating conditions.”
From A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation (2025) · cites this paper as [4]
The relevant literature has primarily focused on the electrical properties of magnet materials, leaving a notable gap in understanding thermo-mechanical property evolution under fusion power plant operating conditions.
“The relevant literature has primarily focused on the electrical properties of magnet materials [3, 4, 5], leaving a notable gap in the understanding of thermo-mechanical property evolution under FPP operating conditions.”
From A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation (2025) · cites this paper as [4]
The expected cumulative radiation dose that REBCO can withstand over its operational lifetime in fusion magnets is greater than 4 mdpa.
“This threshold is especially relevant because it is the expected cumulative radiation dose that rare-earth barium copper oxide (REBCO)-the primary constituent of hightemperature superconducting (HTS)-can withstand over their operational lifetime in fusion magnets [4].”
From A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation (2025) · cites this paper as [4]
The Abstract reports helium-ion irradiation of GdBCO tracks up to 4 mdpa, while §2.2 reports approximately 4.4 mdpa in a separate experiment. Neither passage establishes a dose greater than 4 mdpa that REBCO can withstand over a fusion magnet’s operational lifetime. The Discussion (§4) says further experiments on encapsulated samples are needed to assess implications for real magnets; searches for lifetime and radiation tolerance found no such threshold. (LLM, conf=0.77)
Experimental — accuracy not yet measured
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- Authors
- Iliffe, W., Peng, N., Brittles, G., Bateman, R., Webb, R., Grovenor, C., & Speller, S.
- Affiliations
- University of Oxford (GB)
- University of Surrey (GB)
- Tokamak Energy (United Kingdom) (GB)
- Corresponding author
- Iliffe, W
- Venue
- Superconductor Science and Technology
- Publisher
- IOP Publishing
- Published
- 2021-08-03
- Volume
- 34
- Issue
- 9
- Pages
- 09LT01
- ISSN
- 0953-2048 (ISSN-L)
- 1361-6668
- OpenAlex
- W3189836530
- Cited by
- 34
- References
- 43
- Citations by year
- 2026: 7 · 2025: 9 · 2024: 8 · 2023: 5 · 2022: 3 · 2021: 2
- FWCI
- 1.37
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
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- Locations
- Superconductor Science and Technology (publishedVersion, cc-by)
- Oxford University Research Archive (ORA) (University of Oxford) (cc-by)
- Funders
- Engineering and Physical Sciences Research Council (EP/N509711/1)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Superconducting Materials and Applications
- Physical Sciences › Materials Science › Materials Chemistry › Fusion materials and technologies
- Physical Sciences › Engineering › Aerospace Engineering › Particle accelerators and beam dynamics
- Keywords
- radiation damage, coated conductors, REBCO superconductors, GdBCO, critical current density, ion irradiation, helium ion irradiation, room-temperature annealing, irradiation temperature effects, high-temperature superconducting magnets, fusion reactor magnets
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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