The Feasibility Study of the Future Circular Collider at CERN, a major milestone in the largest fundamental science project ever in planning, has been completed on schedule on March 31, 2025. The report has resulted in three volumes: Volume 1: Physics, Experiments, Detectors (CERN-FCC-PHYS-2025-0002), Volume 2: Accelerators, technical infrastructure and safety (CERN-FCC-ACC-2025-0004) and Volume 3: Civil Engineering, Implementation and Sustainability (CERN-FCC-ACC-2025-0003), and is now under review by CERN council to make its recommendation for the future at CERN.
The Feasibility Study for a Future Circular Collider was started after the U.S. and CERN signed a bilateral agreement enabling U.S. participation in 2020, and after CERN Council initiated the study in 2021 to evaluate the cost, technical design, and site feasibility.
These three volumes serve as important backup documents for the shorter ESPPU submissions, the links of which can be found in the following indico page. Submission to the arXiv is ongoing.
The PPC group at MIT has been an active participant in the study since the very beginning. Markus Kute, now professor in Karlsruhe, started the effort and CP took over responsibility on the MIT side since his departure in Fall 2021.
On April 1, 2025, just as the documents were handed in, CP gave a detailed presentation of the project at the Physics Colloquium at Stony Brook University. In this presentation he takes a look at this daring project, which is bound to take over the precision and energy frontier for decades to come. Its major goals, potential and opportunities for collaboration were discussed in some detail.