Title
| On the understanding of Q-slope of niobium thin films |
Author(s)
| Aull, Sarah (CERN) ; Junginger, Tobias (CERN) ; Knobloch, Jens (Helmholtz-Zentrum, Berlin ; Siegen U.) ; Sublet, Alban (CERN) ; Valente-Feliciano, Anne-Marie (Jefferson Lab) ; Venturini Delsolaro, Walter (CERN) ; Zhang, Pei (CERN) |
Publication
| 2015 |
Number of pages
| 7 |
In:
| 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.TUBA03 |
DOI
| 10.18429/JACoW-SRF2015-TUBA03
|
Subject category
| Accelerators and Storage Rings |
Abstract
| The Q-slope of niobium coated copper cavities at medium fields is still the limiting factor for the application the Nb/Cu technology in accelerators. This paper presents a dedicated study of a niobium coating with bulk-like characteristics which shows a Q-slope comparable to bulk Nb at 400 MHz and 4 K. Combining the bulk like film with recent findings of the HIE Isolde indicates that the film microstructure and the Nb/Cu interface are the key aspects to understanding the Q-slope. |
Copyright/License
| CC-BY-3.0 |