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TY - UNPB AU - He, Y. AU - Chen, Q. AU - Dai, J.P. AU - Gao, Z. AU - Guo, H. AU - He, F.S. AU - Huang, G. AU - Huang, Y.L. AU - Jiang, T.C. AU - Li, C.L. AU - Li, Z.Q. AU - Liu, S.H. AU - Pan, W.M. AU - Tan, T. AU - Wan, Y.Q. AU - Wang, F.F. AU - Wu, J.Q. AU - Yue, W.M. AU - Zhang, B. AU - Zhang, J.H. AU - Zhang, S.H. AU - Zhang, S.X. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Overview and SRF Requirements of the CiADS Project 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 - Chinese initiative Accelerator Driven System started constructing in 2018. It consists a superconducting linac with 500 MeV and 5 mA; an LEB coolant fast reactor with 7.5 MW. The first beam coupling with reactor will be in 2024. The sc linac employed 5 families of superconducting resonators, two types of HWRs (β=0.1 and β=0.19), one type of double spokes (β=0.42) and two types of ellipticals (β=0.62 and β=0.82). The whole system will operate in 2 K. A space has been reserved for future upgrading to 1 GeV. As a demo of front-end of ADS, the CAFe (China ADS Front-end demo linac) has been developed and commissioned to verify the SRF techniques, high power CW beam and RAMI. 45 kW proton beam has been delivered to the dump and lasted more than 100 hours at the beginning of 2019. According to the operation experience, the challenge is the stability and performance of cavities under the heavy beam loading, some phenomenas have been observed. Up to now, the design of bulk Nb cavities have been finished and the prototype fabrication is on going. The techniques of Nb/Cu cavity and Nb₃Sn are also developed in IMP for the future project of ADS. PB - JACoW Publishing CP - Geneva, Switzerland ER -