Design and comparison of hybrid multi-bend achromat lattices for HALF storage ring  

作　　者：Peng-Hui Yang Gang-Wen Liu Jian-Hao Xu Wei-Wei Li Tian-Long He Zheng-He Bai 

机构地区：[1]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China

出　　处：《Nuclear Science and Techniques》2023年第7期189-197,共9页核技术（英文）

基　　金：the Fundamental Research Funds for the Central Universities(No.WK2310000107);the National Key Research and Development Program of China(No.2016YFA0402000);National Natural Science Foundation of China(Nos.12205299,11875259,12105284).

摘　　要：The Hefei Advanced Light Facility(HALF)proposed by the National Synchrotron Radiation Laboratory is a green-field vacuum ultraviolet and soft X-ray diffraction-limited storage ring light source with a beam energy of 2.2 GeV and emittance goal of less than 100 pm rad.Inspired by the ESRF-EBS hybrid multi-bend achromat(HMBA),SLS-2,and Diamond-II lattices,we have proposed and designed a modified H6BA lattice as the baseline lattice of the HALF storage ring with 20 identical cells and a natural emittance of approximately 86 pm rad.In this paper,three other types of HMBA lattices including two H7BA lattices and a H6BA lattice are designed for HALF with the same number of cells.The main storage ring proper-ties of these four HMBA lattices are compared.Because the intra-beam scattering(IBS)effect is significant in the HALF storage ring,we calculate and compare the equilibrium emittances of the four lattices with IBS included.These comparisons show that the present modified H6BA lattice,which has a relatively low equilibrium emittance and more straight sections,is preferred for the HALF storage ring after a comprehensive consideration.

关 键 词：Hefei advanced light facility Lattice design Hybrid MBA lattice Intra-beam scattering 

分 类 号：TL594[核科学技术—核技术及应用]