The ring magnets for the SSRL SPEAR injector

A 3-GeV injector has been built at SSRL (Stanford Synchrotron Radiation Laboratory) to replace the SLAC (Stanford Linear Accelerator Center) linear accelerator as an electron source for the SPEAR (Stanford Proton-Electron Asymmetric Ring) storage ring. The authors describe the 133-M circumference injector ring AC magnet system, composed of 32 dipoles, 40 quadrupoles and 24 sextupoles, the support girders, and the power circuit. Magnet specifications, primary design and fabrication considerations, alignment tolerances, and performance data are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>