Speaker
Summary
The trend in future linear particle colliders is to generate high luminosity collisions at the interaction point inside the detector by producing particle beams with smaller and smaller size. In CLIC the particle beams are foreseen to have nanometric dimensions at the interaction point. As a consequence, pre- alignment and stability requirements for all the electromagnets distributed along the machine become more stringent. A high stiffness coarse-fine resolution stage approach combining cam movers and piezo stack actuators has been studied. The coarse stage is used to apply pre-alignment of the magnets and the fine stage for vibration isolation and nano-positioning. A limitation in this setup lies in the speed of the coarse stage, which renders it inoperable during beam time. Another limitation is the small range of the piezo stack actuators. This research will look into the possibility to, in a first time extend the range of the fine resolution stage. At a second time the possibility will be studied to combine all the above mentioned functions into one actuator by combining the required sub-nanometric resolution for active vibration isolation and the nanometric repeatability for nano-positioning along the required stroke for the pre-alignment of the quadrupoles.