Alignment of Duke Free Electron Laser storage ring

At present, Duke Free Electron Laser Laboratory storage ring facilities consist of a 50 meter long RF powered linac and a 107 meter circumference storage ring which is designed to store 1 A of electron beam at 1 GeV. In this report, specifications and procedures for alignment of over 200 magnets, most of which must be positioned to achieve efficient injection and to obtain storage time of several hours, will be discussed. In particular tolerances of better than ±0.05 mm in transverse position of ring quads and ±0.1 mm for the linac quads were achieved. Some redundancy measurements such as a stretched wire method for all straight section components, wire offset measurements for the arc magnets and an invar tape designed by the Budker Institute of Nuclear Physics (BINP) for the distances between the floor monuments were used to verify the accuracy of our alignment method