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Coupling measurement and correction at the SSRF storage ring

  • Research Paper
  • Special Issue on the First Chinese Particle Accelerator Conference (2010)
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Abstract

Brightness is an important parameter for 3rd generation light source. Correcting the emittance coupling is a realistic way to increase brightness without any additional equipment in a machine under operation. The main sources of emittance coupling are betatron coupling and vertical dispersion. At the SSRF storage ring, tune split and LOCO are used to measure the respective betatron and emittance coupling. Both of these sources can be corrected by skew quadrupoles. By measuring the skew quadrupole-coupling response matrix, betatron coupling can be changed from 0.014% to 2%. But the vertical dispersion changes at the same time. LOCO can find the suitable setting to correct simultaneously the betatron coupling and vertical dispersion. The emittance coupling can be reduced to 0.17% by this method. More simulations show the potential for smaller emittance coupling if more skew quadrupoles are employed.

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Authors and Affiliations

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China

    ManZhou Zhang, Jie Hou & HaoHu Li

Authors
  1. ManZhou Zhang
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  2. Jie Hou
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  3. HaoHu Li
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Correspondence to ManZhou Zhang.

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Zhang, M., Hou, J. & Li, H. Coupling measurement and correction at the SSRF storage ring. Sci. China Phys. Mech. Astron. 54 (Suppl 2), 201–206 (2011). https://doi.org/10.1007/s11433-011-4513-8

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  • DOI: https://doi.org/10.1007/s11433-011-4513-8

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