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Yin, Z.

Paper Title Page
MPPT002 Design and Experiment of the BEPCII IR Conventional Dual Aperture Quadrupole
 
  • Z. Yin, Y. Wu, J.F. Zhang
    IHEP Beijing, Beijing
 
  The quadrupole magnet Q1a is one of the final horizontal focus quadrupoles for the Beijing Electron-Positron Collider Interaction Region (BEPCII IR). The BEPCII IR lattice design specification calls for a very high field quality for the quadrupole magnet. The Q1a is a conventional dual apertures quadrupole magnet. The required integral quadrupole strengths in two apertures are the same. This magnet is a septum quadrupole with high current density and solid core. 2D pole contour optimization and pole end chamfers are used to minimize harmonic error. The design methods, experiment results and magnet performances are described in this paper.  
MPPT004 End Chamfer Study and Field Measurements of the BEPCII Dipoles 919
 
  • W. Chen, C. Cao, C. Shi, Z. Yin
    IHEP Beijing, Beijing
 
  The new BEPCII double ring will be added in the existing BEPC tunnel. There are more than 40 bending magnets named 67B in the new ring. The 67B is conventional ‘C’-type dipole magnet. The magnetic filed properties are dominated by the magnet end effect. The end effect have been studied and minimized by a proper end chamfer. Magnetic measurements of the prototype and productions were carried out using long coil. The developing process of the pole end chamfers and the measurement results of the 67B prototype and batch productions are described in the paper.  
WOAD005 BEPCII Interaction Region Design and Construction Status 478
 
  • Y. Wu, F.S. Chen, X.W. Dai, J.B. Pang, Q.L. Peng, Y. Yang, Z. Yin, C.H. Yu, J.F. Zhang
    IHEP Beijing, Beijing
  • M. Wang
    CAEP/IFP, Mainyang, Sichuan
 
  BEPC (Beijing Electron Positron Collider) is now upgrading to a double-ring collider with a new and compact interaction region. The multi-purpose superconducting magnets and conventional dual aperture quadrupole magnets are used as final focusing quadrupole in the interaction region .The two beams collide at the interaction point with a cross angle of ±11 mrad and further beams separation is enhanced with the help of a septum bending magnet which locates just beyond the vertically focusing quadrupole and acts on the outgoing beam lines only. This paper will describe the IR design and its construction status.