Lattice optimization for the HLS-Ⅱ storage ring

BAI Zheng-He; WANG Lin; JIA Qi-Ka; LI Wei-Min

doi:10.1088/1674-1137/37/1/017001

Chinese Physics C> 2013, Vol. 37> Issue(1) : 017001 DOI: 10.1088/1674-1137/37/1/017001

Lattice optimization for the HLS-Ⅱ storage ring

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The upgrade project of the Hefei Light Source (HLS), named HLS-Ⅱ, is under way, whose storage ring will be reconstructed. The HLS-Ⅱ storage ring has lower emittance and more straight sections available for insertion devices compared with the present HLS storage ring. The scan method is applied to the linear lattice optimization for the HLS-Ⅱ storage ring to get thorough information about the lattice. To reduce the computation amount, several scans with different grid spacing values are conducted. And, the calculation of the chromatic sextupole strength for the achromatic mode is included in the scan, which is useful for nonlinear lattice optimization. To better analyze the obtained solutions in the scan, the lattice properties and the variables of quadrupole strengths are statistically analyzed. And, the process of selecting solutions is described in detail, including the choice of the working point, the settings for the emittance and optical functions, and the restriction of maximum magnet strength. Two obtained lattices, one for the achromatic mode and the other for the non-achromatic mode, are presented, including their optical functions and optimized dynamic apertures.

References

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BAI Zheng-He, WANG Lin, JIA Qi-Ka and LI Wei-Min. Lattice optimization for the HLS-Ⅱ storage ring[J]. Chinese Physics C, 2013, 37(1): 017001. doi: 10.1088/1674-1137/37/1/017001

BAI Zheng-He, WANG Lin, JIA Qi-Ka and LI Wei-Min. Lattice optimization for the HLS-Ⅱ storage ring[J]. Chinese Physics C, 2013, 37(1): 017001. doi: 10.1088/1674-1137/37/1/017001 shu

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Received: 2012-02-20
Revised: 1900-01-01

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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

Lattice optimization for the HLS-Ⅱ storage ring

Corresponding author: BAI Zheng-He,

Corresponding author: WANG Lin,

Received Date: 2012-02-20

Accepted Date: 1900-01-01

Available Online: 2013-01-05

Abstract: The upgrade project of the Hefei Light Source (HLS), named HLS-Ⅱ, is under way, whose storage ring will be reconstructed. The HLS-Ⅱ storage ring has lower emittance and more straight sections available for insertion devices compared with the present HLS storage ring. The scan method is applied to the linear lattice optimization for the HLS-Ⅱ storage ring to get thorough information about the lattice. To reduce the computation amount, several scans with different grid spacing values are conducted. And, the calculation of the chromatic sextupole strength for the achromatic mode is included in the scan, which is useful for nonlinear lattice optimization. To better analyze the obtained solutions in the scan, the lattice properties and the variables of quadrupole strengths are statistically analyzed. And, the process of selecting solutions is described in detail, including the choice of the working point, the settings for the emittance and optical functions, and the restriction of maximum magnet strength. Two obtained lattices, one for the achromatic mode and the other for the non-achromatic mode, are presented, including their optical functions and optimized dynamic apertures.

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Lattice optimization for the HLS-Ⅱ storage ring

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