Future Circular Collider Innovation Study

To address the many outstanding questions in fundamental physics, including those brought into sharper focus by the discovery of the Higgs boson, there is no scientific instrument yet conceived with power comparable to a particle collider. Reflecting this, the 2020 update to the European Strategy for Particle Physics set an electron-positron collider as the highest-priority facility after the LHC, along with the investigation of the technical and financial feasibility of such a Higgs factory, followed by a high-energy hadron collider placed in the same 100 km tunnel. This two-stage approach offers a bold vision for a new research infrastructure that would maintain European leadership in fundamental science by the end of the 21st century.

The FCC feasibility study focuses on the first stage (tunnel and lepton circular collider) and with the support of the H2020 FCC Innovation Study (FCCIS) design study, will produce a feasibility report in 2025/2026, in time for the next update to the European Strategy for Particle Physics. The project will deliver a conceptual design and an implementation plan for a new research infrastructure, based on a new tunnel with circumference between 90-100 km and up to a dozen of surface sites.

Although the FCC is a long-term project with a horizon up to the 22nd century, its timescales are rather tight. A post-LHC collider should be operational around the 2040s, ensuring a smooth continuation from the High-Luminosity LHC, so construction would need to begin in the early 2030s. The proposed infrastructure would validate and strengthen the European leadership in science, as well as strengthen the European innovation and industrial capacities, resulting in its increased competitiveness.

- Set up the FCC Feasibility Structure and set up the FCC Collaboration Board, an International Steering Committee, an International Advisory Committee.
- WP2, submitted a technical report describing the baseline layout and the lattice together with workable beam optics. The report includes the achievable performance and what remains to be addressed.
-Placement studies, in the framework of WP3 work, to balance geological and territorial constraints with machine requirements and physics performance suggest that the most suitable scenarios are based on a 92 km-circumference tunnel with eight surface sites. The work progresses iteratively from an initial baseline (delivered by the EuroCirCol H2020 project) to a version that can be used in the administrative preparatory processes with host states (e.g. débat public in France) as an ongoing effort.
- WP3 and WP5 launched the Mining the Future competition, accompanied with an international marketing campaign, and collected 12 solid proposals for the reuse of excavated material that will result from the construction of a new tunnel to host a post-LHC collider.
- The structure of investments and operation costs of the FCC-ee has been developed by CSIL and CERN: different cost items have been identified. The spending profile over the time horizon ranging from 2021 to 2057 (expected end of life of the FCC-ee project) has been developed.
- Different data for the estimation of the socio-economic impacts have been pulled together by CSIL and CERN, distinguishing by type of benefit. Data and calculation are structured in an Excel file with several interlinked spreadsheets. Preliminary estimates of the industrial spillover benefits, value of training, public good value, cultural benefit for on-site visitors have been developed for baseline, optimistic and pessimistic scenarios.
- Developed a new visual identity for the project and launch of the new public website under the coordination of WP5.
-TMFS developed a communication strategy for the project that was also updated to cover aspects of local communications with regional authorities in France & Switzerland.
- Organize a dedicated FCC physics workshop in collaboration with University of Liverpool to document the physics opportunities. Moreover, the research opportunities were published in a dedicated volume of European Physics Journal Plus that was made available as an Open Access document to inform the wider scientific community about ongoing R&D efforts and attract new participants.
- Springer Nature and Overleaf on their way to develop an efficient and seamless publication workflow for very extensive and complex manuscripts such as they are typically encountered for conceptual resp. technical design reports (CDRs / TDRs) authored by large collaborations from major research infrastructures. In the course of the first reporting period project specifications were collected, first developments on various aspects of collaborative writing, editing and submitting initiated, and a pilot on fully xml-based manuscript proofing procedures launched.

Expected luminosity was revisited. Layout was adjusted to 4 IPs to accommodate RF, collimation, and injection/extraction sections. New optics and parameters are maintained in the optics repository.

Impedance budget is constantly being updated as more refined vacuum component designs become available. Collective effects, instability thresholds and luminosity performance taking interplay of impedance and beam-beam effects is being assessed for the new layout.

Develop a diagnostics concept based on an electro-optical setup for bunch-by-bunch measurements of the longitudinal profile and centre of gravity of the bunches. Time-resolved measurements of the horizontal beam size in a dispersive section are proposed as an approach to measure the energy spread. Test (D2.4) prototype diagnostics at the KARA accelerator (KIT)

Has established interfaces with regional industrial partners (partners EdG and DRRT-AuRA), stakeholders of different interest groups and host-state notified bodies, to discuss the potential local effects of the project construction and long-term operation in the region, and develop regional development scenarios together. One topic has been the study of creating a second technology pole for the research infrastructure, leveraging the existing CNRS “Laboratoire d'Annecy de Physique des Particules” (LAPP).

Established a dedicated work package in charge of developing the financial model of the FCC-ee project. The data and estimates produced by the FCCIS project participants will inform the discussion within the International Collaboration governance structure during the next reporting period.

A collaboration agreement has been signed between CERN and the London School of Economics (LSE). LSE’s strong specialization in the analysis of regional socio-economic benefits of public investments was considered extremely useful to contribute to the research objective “Identify impact pathways for co-construction of high-tech systems with industrial partners”.

Developed an updated version of the Code of the Universe photography traveling exhibition and works in the preparation of a new website.

Developed material for local/regional communications for the upcoming site investigations and public consultation meetings that will take place in 2022/2023.

Periodic Reporting for period 1 - FCCIS (Future Circular Collider Innovation Study)

Diese Seite teilen

Herunterladen