摘要
给出了第三代同步辐射光源ＨＥＬＳ储存环的聚焦结构设计．在该设计中采用由不同弯转角度的弯铁组成的ＱＢＡ聚焦结构，从而得到较低的束流发射度；仔细选择它的工作点以抑制二极色品；使用多组六极铁较好进行了色品校正与谐波校正；最后使用跟踪程序进行了跟踪计算。
The lattice design of the HELS storage ring for a third generation synchrotron light source is presented. To achieve low emittance , a kind of modified Quadrupole Bend Achromat (QBA) lattice using bend magnets with different bending angles is adopted. Its working point carefully chosen to suppress second order chromaticity. Many families of sextupoles are adopted for chromaticities correction and harmonics correction. Dynamic aperture study on this lattice using “NEW PATRICIA” tracking code shows that it has sufficiently large dynamic aperture and energy acceptance.
基金
国家自然科学基金
