Author: Liu, G.
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WEPOW027 Initial Lattice Design for Hefei Advanced Light Source: A VUV and Soft X-ray Diffraction-limited Storage Ring 2889
 
  • Z.H. Bai, Q.K. Jia, W. Li, G. Liu, C.W. Luo, Q. Luo, L. Wang
    USTC/NSRL, Hefei, Anhui, People's Republic of China
 
  The upgrade project of Hefei Light Source was successfully completed in 2014 and has been operated for synchrotron radiation users since 2015, which is a second generation light source in the range of VUV and soft X-ray at NSRL in China. To meet the future requirements for users, more efforts are now putting at NSRL into the design of Hefei Advanced Light Source (HALS), a new VUV and soft-X ray diffraction-limited storage ring. The HALS storage ring will have an energy of 2 GeV and a natural emittance of about 50 pm·rad. This paper reports the initial lattice design studies, including linear optics design and nonlinear dynamics optimization.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW027  
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THPMB023 Lattice Compensation of the Wiggler Effect in HLSII with Particle Swarm Optimization 3275
 
  • G. Liu, L. Wang, K. Xuan
    USTC/NSRL, Hefei, Anhui, People's Republic of China
 
  The upgrade project of Hefei Light Source (HLSII) has successfully reduced the natural emittance of the electron beam to lower than 40 nm·rad at 800 MeV with five insertion devices installed. To provide enough straight sections for these insertion devices, the lattice structure has been changed to four double bend achromatic (DBA) with two super-periods from the former four triple bend achromatic (TBA). These different types of the insertion devices can greatly improve the performance of the light source, but simultaneously they can also influence the dynamics of the electron beam in the storage ring. Especially they can bring the distortion of the linear beam optics seriously. In order to make sure the stability and the quality of the beam meeting the design goal, the effect of these insertion devices must be compensated. In this paper, a direct compensation method is applied for the wiggler in the HLSII storage ring with the particle swarm optimization.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB023  
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