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Wang, D.

Paper Title Page
TUPE015 The X-band System for the FERMI@ELETTRA FEL Project 2173
 
  • G. D'Auria, M.M. El-Ashmawy, A. Rohlev, M. Scafaru, C. Serpico, A. Turchet, D. Wang
    ELETTRA, Basovizza
  
 

The single pass FEL facility FERMI@ELETTRA, in construction at the ELETTRA Synchrotron Radiation Laboratory in Trieste, requires very short electron bunches with a very high beam quality at the entrance of the undulator chain. To linearize the longitudinal phase space before the bunch compression, mitigating the effects of Coherent Synchrotron Radiation (CSR), a 4th harmonic accelerating section (12 GHz) will be installed before the first magnetic chicane. Here an overall description of the X-band system under development is reported.

  
TUPEB020 Beam Dynamic Issues in the BEPCII Luminosity Commissioning 1560
 
  • Q. Qin, N. Huang, D. Ji, Y. Jiao, Y.D. Liu, Y.M. Peng, 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
    IHEP Beijing, Beijing
  • Z. Duan
    IHEP Beiing, Beijing
  
 

As a tau-charm factory like collider, the upgrade project of the Beijing Electron Positron Collider (BEPCII), has reached its first design value of luminosity. During the commissioning of its luminosity, beam optics recovery, machine parameters measurement, detector solenoid compensation, and instability cure are main problems we met. Besides commissioning the machine, beams were delivered to the users from high energy physics and synchrotron radiation. This paper summarizes the accelerator physics issues in the BEPCII luminosity commissioning.


Supported by National Natural Sciences Foundation of China (10725525)

  
WEPE007 Simulation Study of Scale Error Effect of BPM in ILC Main Linac Corrections 3353
 
  • K. Kubo
    KEK, Ibaraki
  • D. Wang
    IHEP Beijing, Beijing
  
 

For preserving low emittance beam in the ILC (International Linear Collider) main linacs, Dispersion Matching Steering (DMS) is planed to be used as a main correction method. The linacs are following the earth's curvature and the designed vertical dispersion in the linacs should not be zero. For this reason, the orbit difference due to beam energy difference will have to be measured accurately and tolerance of scale error of beam position monitors (BPM) can be tight. Here, the tolerance of the scale error are estimated by tracking simulations. Choice of optics design for relaxing the tolerance is also discussed.

  
WEPE088 A New Design for ILC 3.2 km Damping Ring Based on FODO Cell 3551
 
  • D. Wang, J. Gao, Y. Wang
    IHEP Beijing, Beijing
  
 

In this paper, we made a new design for ILC 3.2 km damping ring with 2 arcs based on FODO cell and 2 straight sections which are nearly the same as the new version of the 6.4 km ring DCO4. This new lattice uses less dipoles and quadrupoles than the present SuperB like lattice and has an adequate aperture for the large injected emittance of the positron beam. The work of lattice design and DA optimization will be presented in detail.