Design and construction of the linac coherent light source (lcls) undulator system

The Linac Coherent Light Source (LCLS), now under construction at the Stanford Linear Accelerator Center (SLAC) in California, will be the world’s first x-ray freeelectron laser when it comes online next year. LCLS design and construction are being performed by a partnership of three U.S. national laboratories: Argonne National Laboratory (ANL), Lawrence Livermore National Laboratory (LLNL), and SLAC. A team from Argonne’s Advanced Photon Source is responsible for design and construction of the high-precision, state-ofthe-art undulator system, including the undulators, quadrupoles, sub-micron-precision beam diagnostics, vacuum chambers, ultra-stable and micron-level-settable support and motion system, and computer control and monitoring. An overview of achieved precision and stability results will be presented together with the LCLS construction status.