ANL, Argonne, USA
Modern particle accelerators must operate with increasingly restrictive beam stability requirements. Synchrotron light sources require sub-micron stability for time periods extending to one week and for frequencies up to 1 kHz and beyond, and FELs need similar levels of shot-to-shot reproducibility. A variety of beam position monitor (BPM) technologies used at synchrotron light sources, FEL facilities, and other accelerators will be reviewed and future areas of development outlined. This will include an overview of analog vs. digital downconversion, including data acquisition and processing techniques. Orbit and trajectory feedback systems using modern field-programmable gate array technology and dedicated fast data networks have been developed to take advantage of high-speed BPM data streams and will be described.
