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Impact of Ground Motion on Luminosity Performance and Cost in Site Selection

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Ground motion dynamic imperfections can significantly influence luminosity performance and costs. Many imperfections appear to be site-independent. For instance, TESLA experiences a 15% loss in luminosity at noisy sites if luminosity optimization is conducted within the pulse. The implications of static tuning due to ground motion remain unexplored. Essential decisions must be made regarding whether ground motion should factor into site selection and if mitigation through stabilization is necessary, or if performance loss can be accepted. GG4 will provide vital ground motion spectra.

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Impact of Ground Motion on Luminosity Performance and Cost in Site Selection

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  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

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