STATUS OF THE CLIC STUDY ON MAGNET STABILIZATION AND TIME-DEPENDENT LUMINOSITY

The nanometer beam size at the CLIC interaction point imposes magnet vibration tolerances that range from 0.2 nm to a few nanometers. This is well below the floor vibra-tion usually observed. A test stand for magnet stability was set-up at CERN in the immediate neighborhood of roads, operating accelerators, manual shops, and regular office space. It was equipped with modern stabilization tech-nology. First results are presented, demonstrating signif-icant damping of floor vibration. CLIC quadrupoles have been stabilized vertically to an rms motion of (0.90.1) nm above 4 Hz, or (1.30.2) nm with a nominal flow of cooling water. For the horizontal and longitudinal direc-tions respectively, a CLIC quadrupole was stabilized to (0.40.1) nm and (3.20.4) nm.