Ultralow Surface Resistance via Vacuum Heat Treatment of Superconducting Radio-Frequency Cavities

Ultralow Surface Resistance via Vacuum Heat Treatment of Superconducting Radio-Frequency Cavities

We report on an effort to improve the performance of superconducting radiofrequency cavities by using heat treatment in a temperature range sufficient to dissociate the natural surface oxide. We find that the residual resistance is decreased significantly, and we find an unexpected reduction in the...

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Veröffentlicht in:Physical review applied 2020-01, Vol.13 (1), Article 014024
Hauptverfasser: Posen, S., Romanenko, A., Grassellino, A., Melnychuk, O.S., Sergatskov, D.A.
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Sprache:eng
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Zusammenfassung:We report on an effort to improve the performance of superconducting radiofrequency cavities by using heat treatment in a temperature range sufficient to dissociate the natural surface oxide. We find that the residual resistance is decreased significantly, and we find an unexpected reduction in the Bardeen-Cooper-Schrieffer (BCS) resistance. Together these result in extremely high-quality factor values at relatively large accelerating fields Eacc ~20 MV/m: Q0 =3–4× 1011 at
ISSN:2331-7019
2331-7019
DOI:10.1103/PhysRevApplied.13.014024