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 - Hu, H.
AU - Bafia, D.
AU - Kim, Y.K.
ED - Saito, Kenji
ED - Xu, Ting
ED - Sakamoto, Naruhiko
ED - Schaa, Volker R.W.
ED - Thomas, Paul W.
TI - Comparing the Effectiveness of Low Temperature Bake in EP and BCP Cavities
J2 - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY - Grand Rapids, MI, USA
T2 - International Conference on RF Superconductivity
T3 - 21
LA - english
AB - Electropolishing (EP) and buffered chemical polishing (BCP) are conventional surface preparation techniques for superconducting radiofrequency (SRF) cavities. Both EP and BCP treated SRF cavities display high field Q-slope (HFQS) which degrades performance at high gradients. While high gradient performance in EP cavities can be improved by introducing oxygen via a low temperature bake (LTB) of 120^{°}C by 48 hours, LTB does not consistently remove HFQS in BCP cavities. There is no consensus as to why LTB is not effective on BCP prepared cavities. We examine quench in EP, BCP, EP+LTB, and BCP+LTB treated 1.3 GHz single-cell Nb cavities by studying the heating behavior with field using a temperature mapping system. Cavity performance is correlated to characterizations of surface impurity profile obtained via time of flight secondary ion mass spectrometry studies. We observe a difference in near surface hydrogen concentration following BCP compared to EP that may suggest that the causes of quench in EP and BCP cavities are different.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 187
EP - 190
KW - cavity
KW - SRF
KW - niobium
KW - radio-frequency
KW - factory
DA - 2023/09
PY - 2023
SN - 2673-5504
SN - 978-3-95450-234-9
DO - doi:10.18429/JACoW-SRF2023-MOPMB040
UR - https://jacow.org/srf2023/papers/mopmb040.pdf
ER -