New chromaticity compensation approach and dynamic aperture increase in the SSRF storage ring

TIAN Shun-Qiang; HOU Jie; CHEN Guang-Ling; LIU Gui-Min

doi:10.1088/1674-1137/32/8/015

Chinese Physics C> 2008, Vol. 32> Issue(8) : 661-664 DOI: 10.1088/1674-1137/32/8/015

New chromaticity compensation approach and dynamic aperture increase in the SSRF storage ring

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Abstract：
Strong chromatic sextupoles used to compensate natural chromaticities in the third generation light source storage ring usually reduce dynamic aperture drastically. Many optimization methods can be used to find solutions that provide large dynamic apertures. This paper discusses a new optimization approach of sextupole strengths with step-by-step procedure, which is applied in the SSRF storage ring, and a better solution is obtained. Investigating driving terms generated by the sextupoles in every step can analyze their convergences and guide the weight setting among different terms in object function of the single resonance approach based on the perturbation theory.

References

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TIAN Shun-Qiang, HOU Jie, CHEN Guang-Ling and LIU Gui-Min. New chromaticity compensation approach and dynamic aperture increase in the SSRF storage ring[J]. Chinese Physics C, 2008, 32(8): 661-664. doi: 10.1088/1674-1137/32/8/015

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Received: 2007-09-24
Revised: 2007-10-16

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

New chromaticity compensation approach and dynamic aperture increase in the SSRF storage ring

Corresponding author: TIAN Shun-Qiang,

Received Date: 2007-09-24

Accepted Date: 2007-10-16

Available Online: 2008-08-05

Abstract:

Strong chromatic sextupoles used to compensate natural chromaticities in the third generation light source storage ring usually reduce dynamic aperture drastically. Many optimization methods can be used to find solutions that provide large dynamic apertures. This paper discusses a new optimization approach of sextupole strengths with step-by-step procedure, which is applied in the SSRF storage ring, and a better solution is obtained. Investigating driving terms generated by the sextupoles in every step can analyze their convergences and guide the weight setting among different terms in object function of the single resonance approach based on the perturbation theory.

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New chromaticity compensation approach and dynamic aperture increase in the SSRF storage ring

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通讯作者: 陈斌, [email protected]

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