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AbstractAbstract
[en] Ground motion can cause significant beam emittance growth and orbit oscillations in large hadron colliders due to a vibration of numerous focusing magnets. Larger accelerator ring circumference leads to smaller revolution frequency and, e.g. for the Fermilab Very Large Hadron Collider(VLHC) 50-150 Hz vibrations are of particular interest as they are resonant with the beam betatron frequency. Seismic measurements at an existing large accelerator under operation can help to estimate the vibrations generated by the technical systems in future machines. Comparison of noisy and quiet microseismic conditions might be useful for proper choice of technical solutions for future colliders. This article presents results of wide-band seismic measurements at the Fermilab site, namely, in the tunnel of the Tevatron and on the surface nearby, and in two deep tunnels in the Illinois dolomite which is though to be a possible geological environment of the future accelerators
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Nov 1997; 21 p; 5. international workshop on accelerator alignment; Argonne, IL (United States); 14-17 Oct 1997; CONF-9710124--; CONTRACT AC02-76CH03000; ALSO AVAILABLE FROM OSTI AS DE98051151; NTIS; INIS; US GOVT. PRINTING OFFICE DEP
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