A researcher is tuning the position of a mirror on an optical bench suspended to a superattenuator. The whole vacuum enclosure, when opened for intervention, is a clean room. The white cables are going up all along the superattenuator. They are used to control from remote the orientation of the mirrors, to acquire signals and control the length of a major element, the "output mode cleaner cavity".
Credits: Cyril Frésillon/Virgo/Photothèque CNRS