3.3 Workshop on Ground Motion in Future Accelerators

fly apart are key issues. For small structures, great advances have been made in computer modeling. It would be desirable to extend the models to bulk samples. X-ray intensity fluctuation spectroscopy is already being pioneered at third generation light sources and its extension to x-ray FELs, in terms of the time-scales and length-scales, were discussed, together with the possibility of studying a broad range of materials. There were intense discussions trying to define the most important radiation characteristics. This will of course in many cases depend on the specific experiments, but in general terms the following order was established, in de-creasing order of importance: