STAR: Sandia Technology Applications Ring conceptual design report

Sandia National Laboratories, jointly with Lawrence Berkeley Laboratory, has designed an electron synchrotron vacuum ultraviolet (vuv) light source, STAR, the Sandia Technology Applications Ring. STAR is a small technology-oriented light source in contrast to existing synchrotron light sources which have been research oriented and have consequently emphasized extending the state-of-the-art in machine parameters. The design of a technology-oriented source invariably involves trade-offs in major design parameters such as intensity, spectral range, pulse length, size, and cost. For a machine such as STAR, the size and cost are reduced to the point that an individual corporation or consortium can have its own facility and hence can tailor operational characteristics (such as access, scheduling, beam parameters, and user friendliness) to its specific needs. The design philosophy of STAR is to incorporate many features developed and proven at other vuv rings. The major technical difference between STAR and other synchrotron light sources is that STAR is designed for a beam current substantially lower than the difficult-to-achieve one ampere design level of other rings. This permits the use of lower cost, low energy injection of electrons into the ring. In addition, particular attention has been paid to vacuum and diagnostic considerations. The approach of using proven technology coupled with an engineering emphasis to address known critical areas is expected to permit rapid commissioning of a ring that would also serve as a prototype for other dedicated technology rings