Geodetic, survey and alignment challenges of the FCC-ee

Abstract

At CERN, each generation of particle accelerators led to the implementation of new geodetic, survey and alignment methodologies following the increasing accuracy requirements and the evolution of survey instruments. The Future Circular Collider (FCC), representing the next generation of particle accelerator, will in its turn require new development to ensure the accomplishment of the construction of the 91 km tunnel and the correct positioning of the machine components. Mainly because of larger size of the machine but also due to the design of its components, the existing geodetic infrastructure has to be extended and upgraded. The accelerator component alignment methodology currently used in not scalable, and the Machine Detector Interface alignment procedure must be revised including monitoring of the alignment. The article summarizes the different aspects of the geodetic, survey and alignment challenges that are currently investigated during the FCC feasibility studies.