It is a central part of the future accelerator center FAIR, currently being built in international collaboration at the GSI Helmholtzzentrum in Darmstadt, and at the same time the heart of one of the largest construction projects for research worldwide: the large underground FAIR ring accelerator SIS100 on the northern FAIR construction site with a circumference of 1,100 meters. On the same place where the groundbreaking ceremony was held a few years ago, representing the start of the building…