Improved step-by-step chromaticity compensation method for chromatic sextupole optimization

Gang-Wen Liu; Zheng-He Bai; Qi-Ka Jia; Wei-Min Li; Lin Wang

doi:10.1088/1674-1137/40/5/057002

Chinese Physics C> 2016, Vol. 40> Issue(5) : 057002 DOI: 10.1088/1674-1137/40/5/057002

Improved step-by-step chromaticity compensation method for chromatic sextupole optimization

1.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

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Abstract：
The step-by-step chromaticity compensation method for chromatic sextupole optimization and dynamic aperture increase was proposed by E. Levichev and P. Piminov(E. Levichev and P. Piminov, 2006). Although this method can be used to enlarge the dynamic aperture of a storage ring, it has some drawbacks. In this paper, we combined this method with evolutionary computation algorithms, and proposed an improved version of this method. In the improved method, the drawbacks are avoided, and thus better optimization results can be obtained.
- chromatic sextupole ,
- chromaticity compensation ,
- dynamic aperture ,
- optimization ,
- particle swarm optimization

References

[1]	E. Levichev and P. Piminov, Algorithm for Chromatic Sextupole Optimization and Dynamic Aperture Increase, in Proceedings of the 10th European Particle Accelerator Conference(Edinburgh:EPS-AG, 2006), p. 2116
[2]	D. Einfeld, E. Levichev and P. Piminov, ALBA Dynamic Aperture Optimization, in Proceedings of the 11th European Particle Accelerator Conference(Genoa:EPS-AG, 2008), p. 3140
[3]	Eugene Levichev, Pavel Piminov, Pantaleo Raimondi et al, LNF-INFN preprint, LNF-07/15(IR)(2007)
[4]	Rania Hassan, Babak Cohanim, Olivier de Weck et al, A Comparison of Particle Swarm Optimization and the Genetic Algorithm, in Proceedings of the 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference(Austin:AIAA, 2005), AIAA 2005-1897
[5]	Lin Wang, Weimin Li, Guangyao Feng et al, The Upgrade Project of Hefei Light Source(HLS), in Proceedings of the 1st International Particle Accelerator Conference(Kyoto:IPAC'10 OC/ACFA, 2010), p. 2588
[6]	Zheng-He Bai, Lin Wang, Qi-Ka Jia et al, Chin. Phys. C, 37(1):017001(2013)
[7]	Zheng-He Bai, Lin Wang, Qi-Ka Jia et al, Chin. Phys. C, 37(4):047004(2013)
[8]	Carlos A. Coello Coello, Gregorio Toscano Pulido, and Maximino Salazar Lechuga, IEEE Trans. Evol. Comp., 8(3):256-279(2004)

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Gang-Wen Liu, Zheng-He Bai, Qi-Ka Jia, Wei-Min Li and Lin Wang. Improved step-by-step chromaticity compensation method for chromatic sextupole optimization[J]. Chinese Physics C, 2016, 40(5): 057002. doi: 10.1088/1674-1137/40/5/057002

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Received: 2015-11-03
Revised: 2015-12-22

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Supported by National Natural Science Foundation of China(11175182, 11175180)

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沈阳化工大学材料科学与工程学院沈阳 110142