Nitrogen and argon doping of niobium for superconducting radio frequency cavities: a pathway to highly efficient accelerating structures
By A. Grassellino, A. Romanenko, D. Sergatskov, O. Melnychuk, Y. Trenikhina, A. Crawford, A. Rowe, M. Wong, T. Khabiboulline, F. Barkov. 2013
341 citations recorded by the source corpus.
We report a surface treatment that systematically improves the quality factor of niobium radio frequency cavities beyond the expected limit for niobium. A combination of annealing in a partial pressure of nitrogen or argon gas and subsequent electropolishing of the niobium cavity surface leads to unprecedented low values of the microwave surface resistance, and an improvement in the efficiency of the accelerating structures up to a factor of 3, reducing the cryogenic load of superconducting cavities for both pulsed and continuous duty cycles. The field dependence of the surface resistance is reversed compared to standardly treated niobium.
Subfields: Aerospace Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/26f48fcf6ced83539c434dc977db05936e75295c
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- A. Grassellino
- A. Romanenko
- Y. Trenikhina
- M. Checchin
- M. Martinello
- O. Melnychuk
- S. Aderhold
- S. Posen
Citations in the corpus
- Unprecedented quality factors at accelerating gradients up to 45 MVm−1 in niobium superconducting resonators via low temperature nitrogen infusion (2017, background): “The effect of the low temperature nitrogen treatment becomes even more pronounced as time duration at 120 °C is increased or as temperature is increased to 160 °C and above, showing the typical anti-Q-slope behavior of nitrogen doped cavities [6, 16].”