Experimental Evidence for Electric Surface Resistance in Niobium

Junginger, Tobias and Aull, Sarah and Weingarten, Wolfgang and Welsch, Carsten Peter (2017) Experimental Evidence for Electric Surface Resistance in Niobium. IEEE Transactions on Applied Superconductivity, 27 (7). ISSN 1051-8223

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Abstract

Identifying the loss mechanisms of niobium cavities enables an accurate determination of applications for future accelerator projects and points to research topics required to mitigate current limitations. For several cavities an increasing surface resistance above a threshold field, saturating at higher field has been observed. Measurements on samples give evidence that this effect is caused by the surface electric field. The measured temperature and frequency dependence is consistent with a model that accounts for these losses by interface tunnel exchange between localized states in dielectric oxides and the adjacent superconductor.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Transactions on Applied Superconductivity
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2208
Subjects:
ID Code:
124286
Deposited By:
Deposited On:
13 Apr 2018 10:50
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Sep 2020 05:07