VALIDATION OF A MICROMETRIC REMOTELY CONTROLLED PRE- ALIGNMENT SYSTEM FOR THE CLIC LINEAR COLLIDER USING A TEST SETUP (MOCK-UP) WITH 5 DEGREES OF FREEDOM

The CLIC main beam quadrupoles need to be prealigned within 17 �� m rms with respect to a straight reference line along a sliding window of 200 m. A readjustment system based on eccentric cam movers, which will provide stiffness to the support assembly, is being studied. The cam movers were qualified on a 1 degree of freedom (DOF) test setup, where a repeatability of adjustment below 1�� m was measured along their whole range. This paper presents the 5 DOF mock-up, built for the validation of the eccentric cam movers, as well as the first results of tests carried out: resolution of displacement along the whole range, measurements of the support eigenfrequencies.