The Pixel Tracker is the 66-million-channel device used to pinpoint the vertex of each colliding proton pair, located at the heart of the detector. The geometry of the 14,000-tonne CMS detector is a cylinder lying on its side (22 metres long and 15 metres high in diameter), and it is sliced into 15 sections. Before inserting the Pixel Tracker, six of the slices (i.e., the three on each end) have to be pulled apart and slid along the length of the beampipe to the end walls of underground experimental cavern. This timelapse shows the work involved in performing this task and inserting the delicate sub-detector.
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