Design of a hybrid ten-bend-achromat lattice for a diffraction-limited storage ring light source
Design of a hybrid ten-bend-achromat lattice for a diffraction-limited storage ring light source
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DOI：
10.1016/j.nima.2019.162506
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Peng Yang;Z. Bai;Tong Zhang;Derong Xu;Lin Wang
中科院分区：
文献类型：
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作者：
Peng Yang;Z. Bai;Tong Zhang;Derong Xu;Lin Wang
ESRF EBS提出的混合多弯消色差(MBA)晶格概念由于具有较低的发射度和较好的非线性性能，已被用于某些衍射限制存储环(DLSR)的设计中。在本文中，为了在给定的存储环圆周范围内减小发射度，我们将混合型MBA晶格从典型的混合型7BA扩展到在晶格中心附加三个组合功能弯曲磁体的混合型10BA，因为发射度与弯曲磁体数目的三次幂成反比。对于混合10BA晶格，在设计能量为2.4GeV、周长为324m的DLSR时，研究了两种色散凸点之间的位相推进，所设计的自然发射度为120∼130 pm⋅rad的DLSR具有较大的动态孔径，动量孔径也是可以接受的。
The hybrid multi-bend achromat (MBA) lattice concept, proposed by ESRF EBS, has been used in some diffraction-limited storage ring (DLSR) designs due to both the lower emittance and the better nonlinear performance achieved. In this paper, to reduce the emittance for a given storage ring circumference, we extended the hybrid MBA lattice from the typical hybrid 7BA to a hybrid 10BA with three additional combined function bending magnets in the lattice center, since the emittance scales inversely with the third power of the number of bending magnets. For the hybrid 10BA lattice, two kinds of phase advances between dispersion bumps have been studied in designing a DLSR with an energy of 2.4 GeV and a circumference of 324 m. The dynamic aperture of the designed DLSR with a natural emittance of 120∼ 130 pm⋅ rad is large, and the momentum aperture is also acceptable.