CERN Invites You to Participate in the FCC Public Dialogue Process
Following the publication of the feasibility study for the Future Circular Collider (FCC), CERN has strengthened its dialogue and information activities with the local communities where the future FCC project could potentially be established. In both France and Switzerland, it is customary, before any investment decision is made concerning a major territorial infrastructure project - in the case of the FCC, by the CERN Council no earlier than 2028 - to initiate a public participation process around the project under consideration.
For this reason, over the next four months in France and Switzerland, public events, workshops, and webinars will be organised in order to create the conditions for a transparent and genuine exchange between CERN and the public. This public participation process comes at a time when the CERN Council, bringing together representatives from all CERN Member States, is preparing to update the European Strategy for Particle Physics based on recommendations from the scientific community.
If approved, the FCC would be installed in an underground ring-shaped tunnel 91 km in length, at an average depth of 200 m, located beneath the departments of Haute-Savoie and Ain in France, as well as beneath the canton of Geneva in Switzerland. It would collide electrons and their antiparticles, called positrons, in order to produce results at an unprecedented level of detail. The FCC would therefore help explore the deepest mysteries of the Universe and foster innovation, as well as the development of new technologies and skills over the coming decades.
In order to continue the dialogue initiated by CERN with the public since 2024, two public participation processes will be implemented, according to procedures adapted to the frameworks and practices of participatory democracy specific to CERN’s two Host States:
In Switzerland:
A consultation process overseen by independent expert guarantors, from 18 May to 2 October 2026.
Participatory and information website open since 23 April:
➔ https://www.concertation-fcc-cern.ch
To register for the various events in Switzerland:
https://www.concertation-fcc-cern.ch/agenda-4091
Practical information regarding the launch meeting in Switzerland:
- Date and time: Monday 18 May, from 18:30 to 20:30. The meeting will be followed by an aperitif. (No live streaming.)
- Venue: Uni Mail, Boulevard du Pont-d'Arve 40, Geneva
- Registration recommended via this link
In France:
A "public debate" overseen by the National Commission for Public Debate (CNDP), from 2 June to 1 October 2026.
Participatory and information website open since the morning of 11 May:
➔ https://www.debatpublic.fr/projet-accelerateur-particules
To register for the various events in France:
https://www.debatpublic.fr/projet-accelerateur-particules/agenda
Practical information regarding the launch meeting in France:
- Date and time: Thursday 4 June, from 18:00 to 21:00. The meeting will be followed by an aperitif.
- Venue: ArchParc, 480 rue Richard Gurley Drew, Archamps
- Registration via this link
CERN invites you to participate in the various events in order to learn more about the project under study, to share your experience of CERN during the different meetings, and to submit your questions, opinions, and comments, particularly through the participatory websites mentioned above (opening of the "contributions / ask my questions" section from 18 May on the Swiss website and from 2 June on the French website).
In the meantime, to learn more through the project’s official documentation, submitted for public discussion in both France and Switzerland:
Within the alumni platform, we are also opening an FCC collaboration group to allow you to follow FCC-related news: join the group here https://alumni.cern/topics/58509/home
We are looking forward to these coming weeks of discussion and hope to hear from you and see you at the various events!