Lattice study for the HLS-II storage ring *
Lattice study for the HLS-II storage ring *
复制标题
DOI：
10.1088/1674-1137/37/4/047004
复制
发表时间：
2013-04
影响因子：
3.6
通讯作者：
Z. Bai;Lin Wang;Qi-Ka Jia;Weimin Li
中科院分区：
文献类型：
--
作者：
Z. Bai;Lin Wang;Qi-Ka Jia;Weimin Li
合肥光源（HLS）正在进行一项名为HLS-II的重大升级项目，以获得更低的发射度和更多的插入设备直段。波动器是HLS-II储存环的主要插入装置。本文在已建立的HLS-II储存环点阵参数数据库的基础上，利用全局扫描法得到的与波荡器辐射亮度相关的量，更直接地寻找高亮度点阵。与以前的晶格解相比，消色差和非消色差模式的晶格解很容易找到更低的发射度，插入装置直段中心处更小的β函数和非零色散直段中更低的色散。采用多目标粒子群优化算法研究了消色差模式下长直截面上高低水平β函数交替的超周期晶格。
The Hefei Light Source (HLS) is undergoing a major upgrade project, named HLS-II, to obtain lower emittance and more insertion device straight sections. Undulators are the main insertion devices in the HLS-II storage ring. In this paper, based on the built database of lattice parameters for the HLS-II storage ring obtained by the global scan method, we use the quantity related to the brightness of undulator radiation to more directly search for high brightness lattices. Lattice solutions for achromatic and non-achromatic modes have been easily found with lower emittance, smaller beta functions at the center of insertion device straight sections and lower dispersion in non-zero dispersion straight sections compared with the previous lattice solutions. In this paper, the superperiod lattice with alternating high and low horizontal beta functions in long straight sections for the achromatic mode is studied using the multiobjective particle swarm optimization algorithm.