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 - Wu, X.W. AU - Chen, J.F. AU - Dong, P.C. AU - Huang, X. AU - Huang, Y.W. AU - Liu, Y.F. AU - Ouyang, X.H. AU - Sun, S. AU - Wang, Z. AU - Wu, J.N. AU - Xia, R.Z. AU - Xing, S. AU - Zhang, Y.X. AU - Zhao, S.J. AU - Zhao, Y.L. AU - Zong, Y. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Schaa, Volker R.W. ED - Thomas, Paul W. TI - Development of 3.9 GHz 9-Cell Cavities at SHINE 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 - The Shanghai high-repetition-rate XFEL and extreme light facility (SHINE) Linac requires two 3.9~GHz crymodules to linearize energy distribution before the bunch compressor. As a key component to the project, studies of 3.9~GHz cavities were conducted in the past few years. The first 3.9~GHz 9-cell prototype cavity has been fabricated, tested, and qualified. It reached Q₀=3.5×10⁹ at 13.1~MV/m and a maximum accelerating gradient of 25.0~MV/m during the vertical test of the bare cavity. The prototype has been helium tank integrated and reached Q₀=2.9×10⁹ at 13.1~MV/m in the vertical test, with a large margin with respect to the SHINE specification. The second prototype has been fabricated and is planned to be tested in 2023. This paper will cover the fabrication, surface treatment, and RF test of the 3.9~GHz cavities. PB - JACoW Publishing CP - Geneva, Switzerland SP - 921 EP - 924 KW - cavity KW - electron KW - linac KW - FEL KW - laser DA - 2023/09 PY - 2023 SN - 2673-5504 SN - 978-3-95450-234-9 DO - doi:10.18429/JACoW-SRF2023-THIAA01 UR - https://jacow.org/srf2023/papers/thiaa01.pdf ER -