Neutron irradiation of coated conductors

Eisterer, M.; Fuger, R.; Chudý, Michal; Hengstberger, F.; Weber, H.W.

doi:10.1088/0953-2048/23/1/014009

Cited by 45 publications

(47 citation statements)

References 26 publications

(43 reference statements)

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“…An improvement in flux pinning was seen in proton irradiated sintered ceramic pellets of YBCO and Bi2Sr2Ca2Cu3O10 by Mezzetti et al [74], and in ion irradiated melt-textured YBCO with a high concentration of discontinuous columnar defects by Fuchs et al [75]. However, Behera et al [76] found that swift heavy ion irradiation of YBCO granular thick films damaged grain boundaries, and Eisterer et al [77] found that neutron irradiation of YBCO coated conductors found no improvements. Irradiation is a promising route but the parameter space is vast and systematic studies with good information about values of DN and PN will be required to optimise c .…”

Section: Discussionmentioning

confidence: 99%

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

Wang

Raine

Hampshire

2018

Supercond. Sci. Technol.

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Publisher's copyright statement:Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Manuscript version: Accepted Manuscript Accepted Manuscript is "the version of the article accepted for publication including all changes made as a result of the peer review process, and which may also include the addition to the article by IOP Publishing of a header, an article ID, a cover sheet and/or an 'Accepted Manuscript' watermark, but excluding any other editing, typesetting or other changes made by IOP Publishing and/or its licensors"This Accepted Manuscript is © 2017 IOP Publishing Ltd.As the Version of Record of this article is going to be / has been published on a gold open access basis under a CC BY 3.0 licence, this Accepted Manuscript is available for reuse under a CC BY 3.0 licence immediately.Everyone is permitted to use all or part of the original content in this article, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by/3.0Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permissions may be required. All third party content is fully copyright protected and is not published on a gold open access basis under a CC BY licence, unless that is specifically stated in the figure caption in the Version of Record.View the article online for updates and enhancements. AbstractThe detrimental effects of grain boundaries have long been considered responsible for the low critical current densities ( c ) in high temperature superconductors. In this paper, we apply the quantitative approach used to identify the cause of the 'weak-link' grain boundary behaviour in YBa2Cu3O7 [1], to the Bi2Sr2CaCu2O8 and Bi2Sr2Ca2Cu3O10 materials that we have fabricated. Magnetic and transport measurements are used to characterise the grain and grain boundary properties of micro-and nanocrystalline material. Magnetisation measurements on all nanocrystalline materials show non-Bean-like behaviour and are consistent with sur...

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Section: Discussionmentioning

confidence: 99%

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

Wang

Raine

Hampshire

2018

Supercond. Sci. Technol.

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“…Finally, we could also mention the use of neutron irradiation as a tool to distinguish between all types of CCs among the low field regions where granularity effects are dominant from high magnetic fields where vortex pinning is enhanced by the created defects. Of course, understanding these issues is essential in order to use these materials in magnets for fusion applications [87].…”

Section: Vortex Pinning Strategiesmentioning

confidence: 99%

Coated conductors for power applications: materials challenges

Obradors

Puig

2014

Supercond. Sci. Technol.

343

245

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This manuscript reports on the recent progress and the remaining materials challenges in the development of coated conductors (CCs) for power applications and magnets, with a particular emphasis on the different initiatives being active at present in Europe. We first summarize the scientific and technological scope where CCs have been raised as a complex technology product and then we show that there exists still much room for performance improvement. The objectives and CC architectures being explored in the scope of the European project EUROTAPES are widely described and their potential in generating novel breakthroughs emphasized. The overall goal of this project is to create synergy among academic and industrial partners to go well beyond the state of the art in several scientific issues related to CCs' enhanced performances and to develop nanoengineered CCs with reduced costs, using high throughput manufacturing processes which incorporate quality control tools and so lead to higher yields. Three general application targets are considered which will require different conductor architectures and performances and so the strategy is to combine vacuum and chemical solution deposition approaches to achieve the targeted goals. A few examples of such approaches are described related to defining new conductor architectures and shapes, as well as vortex pinning enhancement through novel paths towards nanostructure generation. Particular emphasis is made on solution chemistry approaches. We also describe the efforts being made in transforming the CCs into assembled conductors and cables which achieve appealing mechanical and electromagnetic performances for power systems. Finally, we briefly mention some outstanding superconducting power application projects being active at present, in Europe and worldwide, to exemplify the strong advances in reaching the demands to integrate them in a new electrical engineering paradigm.

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“…В-третьих, ВТСП-ленты термоядерных устройств должны быть устойчивы к нейтронной радиации. Эффективное сечение поглощения медленных нейтронов изотопами 155 Gd и 157 Gd на пять порядков выше (~2,510 5 барн у 157 Gd), а у 156 Gd, 158 Gd и 160 Gd примерно такое же, как у иттрия, -порядка 1 барн [11]. При захвате нейтрона происходит ядерная реакция, например, 157 Gd + n → 158 Gd + γ с выделением энергии в слое ВТСП порядка 30 кэВ, что приводит к разрушению ВТСП в объёме нескольких элементарных ячеек [12].…”

Section: требования к втсп-лентам для тнэ токамаковunclassified

CURRENT-CARRYING CABLE MADE OF THE 2nd GENERATION HTS TAPES FOR MAGNET SYSTEM OF FUSION NEUTRON SOURCE

Novikov¹,

Ivanov²,

Novikov³

et al. 2014

PAST-TF

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Применение токонесущих элементов (ТНЭ) из высокотемпературного сверхпроводника (ВТСП) 2-го поколения в магнитных системах термоядерного источника нейтронов (ТИН) и других термоядерных устройств позволит существенно повысить магнитное поле и термодинамическую стабильность по сравнению с низкотемпературными сверхпроводниковыми (НТСП) магнитами. Прорабатывается конструкция геликоидального (частично транспонированного) ТНЭ из ВТСП-2 для тороидального магнита ТИН с проточным охлаждением газообразным гелием, током 20-30 кА при рабочей температуре 10-20 К и поле на обмотке 12-15 Тл (в перспективе до ~20 Тл). Изготовлены и исследованы короткие образцы геликоидального сильноточного гибкого ТНЭ, создаётся опытное производство длинномерных кусков ТНЭ. Применяемая методика изготовления позволяет делать ТНЭ, сочетающий высокий рабочий ток, тепловую и механическую стабильность, технологичность применения и низкий уровень потерь в переменных режимах. Обоснована возможность изготовления ТНЭ с требуемыми для ТИН габаритами и значениями рабочих параметров (и с существенным запасом) уже при использовании серийных современных ВТСП-лент 2-го поколения. Максимальное поле тороидальных магнитов из ВТСП-2 ТНЭ будет ограничено только механическими свойствами корпуса и структуры магнита, а тепловая стабильность на ~2 порядка выше, чем у НТСП ТНЭ. Геликоидальный ВТСП-2 ТНЭ является перспективным для термоядерных и гибридных электростанций, и его конструкции и технологии производства, а также макетные катушки из него для ТИН и других токамаков стоит разрабатывать уже сейчас. Ключевые слова: геликоидальный сильноточный ВТСП токонесущий элемент, тороидальные магнитные системы, термоядерный источник нейтронов.

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Neutron irradiation of coated conductors

Cited by 45 publications

References 26 publications

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

Coated conductors for power applications: materials challenges

CURRENT-CARRYING CABLE MADE OF THE 2nd GENERATION HTS TAPES FOR MAGNET SYSTEM OF FUSION NEUTRON SOURCE

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Neutron irradiation of coated conductors

Cited by 45 publications

References 26 publications

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi2Sr2CaCu2O8and Bi2Sr2Ca2Cu3O10superconductors

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi2Sr2CaCu2O8and Bi2Sr2Ca2Cu3O10superconductors

Coated conductors for power applications: materials challenges

CURRENT-CARRYING CABLE MADE OF THE 2nd GENERATION HTS TAPES FOR MAGNET SYSTEM OF FUSION NEUTRON SOURCE

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The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors