• J.Y. Zhai, J.P. Dai, L. Dong, J. Gao, Z.D. Guo, Z.Q. Li, L.L. Men, Q.Y. Wang
  IHEP Beijing, Beijing
• J.Z. Chen, J.Q. Qiao
  HJL, Beijing
• J.X. Wang, H. Yu, H. Yuan
  BIAM, Beijing
• W.P. Xie
  Ningxia Orient Tantalum Industry Co., Ltd., Dawukou District, Shizuishan city
• T.X. Zhao
  IHEP Beiing, Beijing

The combination of the low-loss shape and large grain niobium material is expected to be the possible way to achieve higher gradient and lower cost for ILC 9-cell cavities. As the key component of the 'IHEP 1.3 GHz SRF Accelerating Unit and Horizontal Test Stand Project', a low-loss shape 9-cell cavity using Ningxia large grain niobium has been fabricated and surface treated at IHEP and will be tested at KEK. The fabrication procedure, surface treatment recipes as well as the SRF facilities are presented in this paper.

• J. Gao, Y.L. Chi, J.P. Dai, T.M. Huang, C. H. Li, S.P. Li, Z.Q. Li, Q. Ma, W.M. Pan, F. Qiu, Y. Sun, G.W. Wang, J.Y. Zhai
  IHEP Beijing, Beijing
• R. Ge, T.X. Zhao
  IHEP Beiing, Beijing

1.3 GHz superconducting radio-frequency (SRF) technology is one of the key technologies for the ILC and future XFEL / ERL projects of China. With the aim to develop this technology, IHEP has started a program to build an SRF Accelerating Unit in the frame of ILC collaboration. The SRF Accelerating Unit contains a 9-cell 1.3 GHz superconducting cavity, a short cryomodule, a high power input coupler, a tuner, a low level RF system and a high power RF source, etc. The unit can undergo beam test and used as the booster for any SRF linac based test facility. Recent progress of the components R&D is presented.

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