JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF
AU - Bate, C.
AU - Dangwal Pandey, A.
AU - Ermakov, A.
AU - Foster, B.
AU - Hillert, W.
AU - Keller, T.F.
AU - Reschke, D.
AU - Schaffran, J.
AU - Sievers, S.
AU - Weise, H.
AU - Wenskat, M.
ED - Saito, Kenji
ED - Xu, Ting
ED - Sakamoto, Naruhiko
ED - Lesage, Ana
ED - Schaa, Volker R.W.
TI - Update on Nitrogen Infusion Sample R&D at DESY
J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021
CY - East Lansing, MI, USA
T2 - International Conference on RF Superconductivity
T3 - 20
LA - english
AB - Many accelerator projects such as the European XFEL cw upgrade or the ILC, would benefit from cavities with reduced surface resistance (high Q-values) while maintaining a high accelerating gradient. A possible way to meet the requirements is the so-called nitrogen-infusion procedure on Niobium cavities. However, a fundamental understanding and a theoretical model of this method are still missing. The approach shown here is based on R\&D using small samples, with the goal of identifying all key parameters of the process and establishing a stable, reproducible recipe. To understand the underlying processes of the surface evolution that give improved cavity performance, advanced surface-analysis techniques (e.g. SEM/EDX, TEM, XPS, TOF-SIMS) are utilized and several kinds of samples are analyzed. Furthermore, parameters such as RRR and the surface critical magnetic field denoted as H_{c3} have been investigated. For this purpose, a small furnace dedicated to sample treatment was set up to change and explore the parameter space of the infusion recipe. Results of these analyses and their implications for the R\&D on cavities are presented.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 57
EP - 61
KW - niobium
KW - vacuum
KW - cavity
KW - superconductivity
KW - SRF
DA - 2022/10
PY - 2022
SN - 2673-5504
SN - 978-3-95450-233-2
DO - doi:10.18429/JACoW-SRF2021-SUPFDV001
UR - https://jacow.org/srf2021/papers/supfdv001.pdf
ER -