Preliminary Ground Motion Measurements at Lnf Site for the Super B Project *
نویسندگان
چکیده
Following previous measurements [1], more detailed preliminary ground motion measurements have been performed at the LNF site for the Super B project site characterization [2]. First, results of vertical ground motion measurements done during 18 hours are shown in order to get an idea of the evolution of the ground motion amplitude with time. Secondly, measurements of ground motion (in the 3 directions of space) were performed at different locations on surface in order to evaluate and to compare the influence of various vibration sources. Then, results of ground motion coherence measured for different distances at two locations close to each other but with soft and rigid floor are compared. These measurements are also compared to the ones done in the ATF2 beam line [3] where a special floor was built for stability [4]. By this way, the results reveal that the LNF is a good site to use ground motion coherence properties for stability like it has been done for ATF2 [5].
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