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- G.W. Wang, J.P. Dai, X.W. Dai, K. He, H.Y. Lin, Y.P. Liu, H. Li, S.P. Li, Z.Q. Li, Q. Ma, F. Meng, W.M. Pan, X.H. Peng, F. Qiu, P. Sha, Y. Sun, G.P. Wang, Q.Y. Wang, B. Xu, G.Y. Zhao
IHEP Beijing, Beijing, People's Republic of China
- J.Z. Li, D.G. Liu
AVIC Beijing Aeromautical Manufacturing Technology Research Institute, People's Republic of China
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In order to ensure the stable operation of BEPCII, we had began a superconducting accelerator unit in IHEP 3 years ago. The development and test of 500MHz Nb cavity, which is the key component of the unit, are introduced in this article. The fabrication of three Nb cavities has been finished, and the post-processing and vertical test of the 1st cavity have been completed, too. The technology of fabrication, electron beam welding (EBW), post-processing has been developed. Meanwhile, the related facilities has been improved, too.
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