Author: Qin, Q.
Paper Title Page
MOPWA069 Upgrades on a Scalable Software Package for Large Scale Beam Dynamic Simulations 282
 
  • X.T. Dong, K. Du, J. Xu, R. Zhao
    IS, Beijing, People's Republic of China
  • Y. He, Z.J. Wang
    IMP/CAS, Lanzhou, People's Republic of China
  • C. Li, Q. Qin, Y.L. Zhao
    IHEP, Beijing, People's Republic of China
  
  Large-scale particle tracking is important for precise design and optimization of the linear accelerator. In this paper a parallel software recently developed for beam dynamics simulation has been benchmarked. The software is based on Particle-In-Cell method, and calculates space charge field by an efficient three-dimension parallel fast Fourier transform method. It uses domain decomposition and MPI library for parallelization. The characteristics of this software are optimized software structure and suitable for modern supercomputers. Several standard accelerating devices have been used to compare the simulation results with other beam dynamics software. They have been run on several different platforms, such as INSPUR cluster at RDCPS, and SHENGTENG7000 at IMPCAS. At first, some simulation results for RFQ with large number of particles will be shown.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA069  
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TUPTY016 Study of Background and MDI Design for CEPC 2028
 
  • Y. Yue, Q. Qin
    IHEP, Beijing, People's Republic of China
  
  CEPC is a project designed to obtain a large number of Higgs events by keeping e+e− collisions at the center-of-mass energy of 240 GeV and deliver peak luminosity above 1034 cm-2 s-1 for each interaction point. The super high energy and the pretty high luminosity will bring some special background problems, which will exert difficulty on the MDI design and the detectors protection. In this article, I will show the simulation result of the main background sources at CEPC and give some suggestions on the MDI design and detectors protection.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY016  
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WEBB3 Lattice and its Related Beam Dynamics Issues in the CEPC Storage Ring 2469
 
  • H. Geng, S. Bai, Z. Duan, Y.M. Peng, Q. Qin, D. Wang, Y. Wang, G. Xu, Y. Yue, Y. Zhang
    IHEP, Beijing, People's Republic of China
  • W. Chou
    Fermilab, Batavia, Illinois, USA
  
  The institute of High Energy Physics has proposed an electron positron collider ring with a circumference of 50-100km to study the Higgs boson. Since the proposal was made, the lattice design for CEPC has been carried out and a preliminary conceptual design report has been written at the end of 2014. In this paper, we will describe the philosophy and results of our lattice design. The procedure of dynamic aperture optimization will be shown. A specific issue for CEPC, the pretzel orbit, which has been found distorting the linear lattice for a considerable amount, will be examined. The ways that we are trying to correct the pretzel orbit effect and the result will be shown. We will also discuss the saw tooth effect on the linear lattice and dynamic aperture of the ring.  
slides icon Slides WEBB3 [2.599 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEBB3  
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