Ground Motion

1
Ground Motion

• Dynamic imperfections will affect luminosity
  performance or cost
• Most imperfections should be site independent
• Ground motion is not
• TRC TESLA loses 15 luminosity in noisy site, if
  no luminosity optimisation is done within pulse
• Impact on static tuning not yet studied

2
Decision Needed

• Is the ground motion part of the site selection?
• Probably too late
• Is the ground motion to be mitigated by
  stabilisation?
• We could also accept loss in performance
• GG4 will provide ground motion spectra