Nonlinear optimization of the modern synchrotron radiation storage ring based on frequency map analysis

TIAN Shun-Qiang; LIU Gui-Min; LI Hao-Hu; HOU Jie; CHEN Guang-Ling; WAN Cheng-Lan

doi:10.1088/1674-1137/33/2/011

Chinese Physics C> 2009, Vol. 33> Issue(2) : 127-134 DOI: 10.1088/1674-1137/33/2/011

Nonlinear optimization of the modern synchrotron radiation storage ring based on frequency map analysis

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Abstract：
In this paper, we present a rule to improve the nonlinear solution with frequency map analysis (FMA), and without frequently revisiting the optimization algorithm. Two aspects of FMA are emphasized. The first one is the tune shift with amplitude, which can be used to improve the solution of harmonic sextupoles, and thus obtain a large dynamic aperture. The second one is the tune diffusion rate, which can be used to select a quiet tune. Application of these ideas is carried out in the storage ring of the Shanghai Synchrotron Radiation Facility (SSRF), and the detailed processes, as well as better solutions, are presented in this paper. Discussions about the nonlinear behaviors of off-momentum particles are also presented.

References

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TIAN Shun-Qiang, LIU Gui-Min, LI Hao-Hu, HOU Jie, CHEN Guang-Ling and WAN Cheng-Lan. Nonlinear optimization of the modern synchrotron radiation storage ring based on frequency map analysis[J]. Chinese Physics C, 2009, 33(2): 127-134. doi: 10.1088/1674-1137/33/2/011

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Received: 2008-04-11
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Nonlinear optimization of the modern synchrotron radiation storage ring based on frequency map analysis

Corresponding author: TIAN Shun-Qiang,

Received Date: 2008-04-11

Accepted Date: 2008-04-30

Available Online: 2009-02-05

Abstract:

In this paper, we present a rule to improve the nonlinear solution with frequency map analysis (FMA), and without frequently revisiting the optimization algorithm. Two aspects of FMA are emphasized. The first one is the tune shift with amplitude, which can be used to improve the solution of harmonic sextupoles, and thus obtain a large dynamic aperture. The second one is the tune diffusion rate, which can be used to select a quiet tune. Application of these ideas is carried out in the storage ring of the Shanghai Synchrotron Radiation Facility (SSRF), and the detailed processes, as well as better solutions, are presented in this paper. Discussions about the nonlinear behaviors of off-momentum particles are also presented.

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Nonlinear optimization of the modern synchrotron radiation storage ring based on frequency map analysis

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