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Wang, N.

Paper Title Page
TUPP081 Longitudinal Wakefields and Impedance in the CSNS/RCS 1718
 
  • N. Wang, Q. Qin
    IHEP Beijing, Beijing
 
  With the more general expressions developed for the wakefield generated by nonrelativistic beam*, the impedances of some main vacuum parts of the Rapid Cycling Synchrotron (RCS) of the China Spallation Neutron Source (CSNS) are calculated and compared with the relativistic case. An impedance model is then proposed for the ring. With this impedance model, beam instabilities in the CSNS/RCS are investigated.

*N. Wang and Q. Qin, Phys. Rev. ST Accel. Beams 10, 111003 (2007)

 
WEPC060 Studies on the Beam Current Dependent Phenomena in the BEPC-II Storage Rings 2130
 
  • Q. Qin, N. Huang, W. B. Liu, Y. D. Liu, Y. M. Peng, J. Qiu, D. Wang, J. Q. Wang, N. Wang, X. H. Wang, Y. Wei, X. M. Wen, J. Xing, G. Xu, C. H. Yu, C. Zhang, Y. Zhang, Z. Zhao, D. M. Zhou
    IHEP Beijing, Beijing
 
  The upgrade project of the Beijing Electron Positron Collider (BEPC-II) has been being commissioned since Nov. 2006. Besides the commissioning of the luminosity, which is expected to be 100 times higher than the BEPC, the BEPC-II also provided beam to the synchrotron radiation users as a light source during these two years. Some beam current dependent phenomena, such as bunch lengthening, single beam instabilities, blow-up in collision, etc., in both collision and synchrotron radiation modes are observed in the machine performance. In this paper, some observations and analyses on these phenomena are given.