• W. Kang, Y. Hao, L.H. Huo, J.X. Song, L. Wang
  IHEP Beijing, Beijing

China Spallation Neutron Source is a high intensity beam facility planed to build in future in China. It is composed of Linac, RCS and target station. The beam extraction from the RCS will be realized by ten vertical kicker magnet and one Lambertson magnet. One prototype kicker magnet has been successfully designed and developed in Institute of High Energy Physics. In this paper, the physical and structural design of the prototype kicker magnet are presented, and issues of the magnet development, construction and test are discussed.

• J.X. Song, Y. Hao, L.H. Huo, W. Kang, L. Wang
  IHEP Beijing, Beijing

China Spallation Neutron Source is a high intensity beam facility planed to build in future in China. It is composed of Linac, RCS and target station. Two sets of pulsed painting bump magnets, 4 magnets in each set , will be used in CSNS RCS to create a dynamic orbit bump for injection process. The design of these 8 bump magnets has been completed. One prototype bump magnet has been assembled and tested. In this paper, the magnetic field analysis, the eddy current and thermal consideration in the end plates of the prototype bump magnet are presented, and issues of the magnet development, construction and test are discussed.

• S. Fu, H. Chen, Y.W. Chen, Y.L. Chi, C.D. Deng, H. Dong, L. Dong, S.X. Fang, W. He, K.X. Huang, W. Kang, X.C. Kong, J. Li, H.F. Ouyang, Q. Qin, H. Qu, C. Shi, H. Sun, J. Tang, S. Wang, J. Wei, T. Wei, T.G. Xu, Z.X. Xu, X. Yin, J. Zhang, Z.H. Zhang
  IHEP Beijing, Beijing

CSNS accelerator mainly consists of an H^- linac and a proton rapid cycling synchrotron. It is designed to accelerate proton beam pulses to 1.6 GeV kinetic energy at 25 Hz repetition rate, striking a solid metal target to produce spallation neutrons. The accelerator is designed to deliver a beam power of 120 kW with the upgrade capability up to 500 kW, The CSNS accelerator is the first large-scale, high-power accelerator project to be constructed in China and thus we are facing a lot of challenges in some key technologies. A series of R&D for major prototypes have being conducted since 2006, including an H^- ion source, DTL tank, RF power supply for the linac, injection/extraction magnets and its pulse power supplies, dipole and quadrupole prototype magnets in the ring and its power supplies, ferrite-loaded RF prototype cavity, ceramic vacuum chamber, control and some beam diagnostics. This paper will briefly introduce the design and R&D status of the CSNS accelerator.

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