APS storage ring lattice consists of 40 almost identical sectors. Each sector contains two dipoles, ten quadrupoles, seven sextupoles and also has a 5-m-long straight section for placement of Insertion Devices (IDs) or other equipment. Four of these straight sections are occupied with rf cavities, one straight section is used for injection, all others are available for IDs. Also, each sector contains eight steering magnets with both horizontal and vertical correction coils and 11 beam position monitors (BPMs). Due to some space limitations, there are several sectors that have less steering magnets or BPMs.
Figures below shows one typical sector of the lattice.
![\includegraphics[width=1.5\textwidth]{latticeCartoon.eps}](img83.gif)
![\includegraphics[width=1.5\textwidth]{oneSector.ps}](img84.gif)
