Proceedings of the 6th International Particle Accelerator Conference
6th International Particle Accelerator Conference, May 3-8, 2015, Richmond, Virginia
Thermal diffusion of nitrogen in superconducting radio frequency cavities at temperatures around 800C has resulted in the increase in quality factor with a low-field Q-rise. However, the maximum accelerating gradients of these doped cavities often reduces below the values achieved by standard treatments. In this contribution, we present the results of the nitrogen diffusion into ingot niobium cavities subjected to successive material removal from the inner cavity surface by electropolishing in an effort to explore the underlying cause for the gradient degradation.
Original Publication Citation
Dhakal, P., Ciovati, G., Kneisel, P., Makita, J., & Myneni, G. R. (2015). Nitrogen doping study in ingot niobium cavities. In S.Henderson, E. Akers, T. Satogata, V.R.W. Schaa (Eds.), Proceedings of the 6th International Particle Accelerator Conference (3506-3508). Joint Accelerator Conferences Website. https://doi.org/10.18429/JACoW-IPAC2015-WEPWI009
Dhakal, Pashupati; Ciovati, Gianluigi; Kneisel, Peter; Myneni, Ganapati Rao; Makita, Junki; Henderson, Stuart (Ed.); Akers, Evelyn (Ed.); Satogata, Todd (Ed.); and Schaa, Volker R.W. (Ed.), "Nitrogen Doping Study in Ingot Niobium Cavities" (2015). Physics Faculty Publications. 635.