Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking

A recently discovered modified low-temperature baking leads to reduced surface losses and an increase of the accelerating gradient of superconducting TESLA shape cavities. We will show that the dynamics of vacancy-hydrogen complexes at low-temperature baking lead to a suppression of lossy nanohydrid...

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Autores principales: Wenskat, Marc, Čižek, Jakub, Liedke, Maciej Oskar, Butterling, Maik, Bate, Christopher, Haušild, Petr, Hirschmann, Eric, Wagner, Andreas, Weise, Hans
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7237483/
https://www.ncbi.nlm.nih.gov/pubmed/32427909
http://dx.doi.org/10.1038/s41598-020-65083-0
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author Wenskat, Marc
Čižek, Jakub
Liedke, Maciej Oskar
Butterling, Maik
Bate, Christopher
Haušild, Petr
Hirschmann, Eric
Wagner, Andreas
Weise, Hans
author_facet Wenskat, Marc
Čižek, Jakub
Liedke, Maciej Oskar
Butterling, Maik
Bate, Christopher
Haušild, Petr
Hirschmann, Eric
Wagner, Andreas
Weise, Hans
author_sort Wenskat, Marc
collection PubMed
description A recently discovered modified low-temperature baking leads to reduced surface losses and an increase of the accelerating gradient of superconducting TESLA shape cavities. We will show that the dynamics of vacancy-hydrogen complexes at low-temperature baking lead to a suppression of lossy nanohydrides at 2 K and thus a significant enhancement of accelerator performance. Utilizing Doppler broadening Positron Annihilation Spectroscopy, Positron Annihilation Lifetime Spectroscopy and instrumented nanoindentation, samples made from European XFEL niobium sheets were investigated. We studied the evolution of vacancies in bulk samples and in the sub-surface region and their interaction with hydrogen at different temperature levels during in-situ and ex-situ annealing.
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spelling pubmed-72374832020-05-29 Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking Wenskat, Marc Čižek, Jakub Liedke, Maciej Oskar Butterling, Maik Bate, Christopher Haušild, Petr Hirschmann, Eric Wagner, Andreas Weise, Hans Sci Rep Article A recently discovered modified low-temperature baking leads to reduced surface losses and an increase of the accelerating gradient of superconducting TESLA shape cavities. We will show that the dynamics of vacancy-hydrogen complexes at low-temperature baking lead to a suppression of lossy nanohydrides at 2 K and thus a significant enhancement of accelerator performance. Utilizing Doppler broadening Positron Annihilation Spectroscopy, Positron Annihilation Lifetime Spectroscopy and instrumented nanoindentation, samples made from European XFEL niobium sheets were investigated. We studied the evolution of vacancies in bulk samples and in the sub-surface region and their interaction with hydrogen at different temperature levels during in-situ and ex-situ annealing. Nature Publishing Group UK 2020-05-19 /pmc/articles/PMC7237483/ /pubmed/32427909 http://dx.doi.org/10.1038/s41598-020-65083-0 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Wenskat, Marc
Čižek, Jakub
Liedke, Maciej Oskar
Butterling, Maik
Bate, Christopher
Haušild, Petr
Hirschmann, Eric
Wagner, Andreas
Weise, Hans
Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking
title Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking
title_full Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking
title_fullStr Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking
title_full_unstemmed Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking
title_short Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking
title_sort vacancy-hydrogen interaction in niobium during low-temperature baking
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7237483/
https://www.ncbi.nlm.nih.gov/pubmed/32427909
http://dx.doi.org/10.1038/s41598-020-65083-0
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