The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF
AU - Yang, Z.Q.
AU - Guo, H.
AU - He, Y.
AU - Li, C.L.
AU - Lin, Z.Q.
AU - Lu, M.
AU - Tan, T.
AU - Xiong, P.R.
AU - Zhang, S.H.
AU - Zhang, S.X.
ED - Michel, Peter
ED - Arnold, André
ED - Schaa, Volker RW
TI - Development of Nb₃Sn Cavity Coating at IMP
J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019
CY - Dresden, Germany
T2 - International Conference on RF Superconductivity
T3 - 19
LA - english
AB - The A15 superconductor Nb₃Sn is one of the most promising alternative materials to standard niobium for SRF applications. In this paper, we report our progress in the development of Nb₃Sn cavity coating by vapor diffusion method at IMP. The evolutionary process of nucleation was analyzed. Influence of S_{n}Cl₂ partial pressure inhomogeneity was studied. Less-nuclear zones were found on the surfaces of nucleation samples. The Nb₃Sn film structure and composition were investigated and analyzed. In light of knowledge obtained above, the coating process was optimized. Finally, both 1.3 GHz and 650 MHz single cell cavities were coated and vertically tested both at 4 K and 2 K. Effect of low temperature baking (1000°C for 48 hs) on the RF performance of Nb₃Sn cavity was studied. After baking, the Q drop in the low field region was eliminated and the Q in the intermediate field region was increased 8 times. The Q was 10 times larger than that of the Nb cavity at 4.2 K even in the case of the ambient field larger than 20 mGs. This study shows that the low temperature baking is an effective enrichment to the post treatment of the Nb₃Sn cavity.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 21
EP - 24
KW - cavity
KW - niobium
KW - SRF
KW - radio-frequency
KW - experiment
DA - 2019/08
PY - 2019
SN - ""
SN - 978-3-95450-211-0
DO - doi:10.18429/JACoW-SRF2019-MOP003
UR - http://jacow.org/srf2019/papers/mop003.pdf
ER -