The influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDE

Superconducting quarter-wave resonators (QWRs) are to be used in the ongoing linac upgrade of the ISOLDE facility at CERN. The cavities are made of niobium sputtered on copper substrates. They will be operated at 101.28 MHz at 4.5 K providing 6 MV/m accelerating gradient with 10 W power dissipation....

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Detalles Bibliográficos
Autores principales: Zhang, Pei, Rosaz, Guillaume, Sublet, Alban, Therasse, Mathieu, Venturini Delsolaro, Walter
Lenguaje:eng
Publicado: 2015
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.18429/JACoW-SRF2015-TUPB077
http://cds.cern.ch/record/2288269
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author Zhang, Pei
Rosaz, Guillaume
Sublet, Alban
Therasse, Mathieu
Venturini Delsolaro, Walter
author_facet Zhang, Pei
Rosaz, Guillaume
Sublet, Alban
Therasse, Mathieu
Venturini Delsolaro, Walter
author_sort Zhang, Pei
collection CERN
description Superconducting quarter-wave resonators (QWRs) are to be used in the ongoing linac upgrade of the ISOLDE facility at CERN. The cavities are made of niobium sputtered on copper substrates. They will be operated at 101.28 MHz at 4.5 K providing 6 MV/m accelerating gradient with 10 W power dissipation. In recent measurements, we found the thermal gradient along the cavity during the niobium superconducting transition has an impact on the cavity quality factor. On the other hand, the speed of the cooling down through the superconducting transition turned out to have no influence on the cavity Q-factor.
id oai-inspirehep.net-1482111
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
record_format invenio
spelling oai-inspirehep.net-14821112019-10-15T15:28:53Zdoi:10.18429/JACoW-SRF2015-TUPB077http://cds.cern.ch/record/2288269engZhang, PeiRosaz, GuillaumeSublet, AlbanTherasse, MathieuVenturini Delsolaro, WalterThe influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDEAccelerators and Storage RingsSuperconducting quarter-wave resonators (QWRs) are to be used in the ongoing linac upgrade of the ISOLDE facility at CERN. The cavities are made of niobium sputtered on copper substrates. They will be operated at 101.28 MHz at 4.5 K providing 6 MV/m accelerating gradient with 10 W power dissipation. In recent measurements, we found the thermal gradient along the cavity during the niobium superconducting transition has an impact on the cavity quality factor. On the other hand, the speed of the cooling down through the superconducting transition turned out to have no influence on the cavity Q-factor.oai:inspirehep.net:14821112015
spellingShingle Accelerators and Storage Rings
Zhang, Pei
Rosaz, Guillaume
Sublet, Alban
Therasse, Mathieu
Venturini Delsolaro, Walter
The influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDE
title The influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDE
title_full The influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDE
title_fullStr The influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDE
title_full_unstemmed The influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDE
title_short The influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for HIE-ISOLDE
title_sort influence of cooldown conditions at transition temperature on the quality factor of niobium sputtered quarter-wave resonators for hie-isolde
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-SRF2015-TUPB077
http://cds.cern.ch/record/2288269
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