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CERN は、大型ハドロン衝突型加速器 (LHC) の後継となる可能性のある未来円形衝突型加速器 (FCC) に取り組んでおり、素粒子物理学の欧州戦略がその科学的価値を確認しています。 FCC は、フランスとスイスの間の 91 キロメートルのトンネルに設置され、実現可能性調査が開始されました。 最初のフェーズには目視検査が含まれ、その後、2024 年に地震調査と掘削が行われます。地質学的特徴や景観への影響などの環境面が評価され、プロジェクトは持続可能な開発の原則に準拠する必要があります。 FCC に関する決定は 2028 年に下され、2040 年代に試運転が行われる可能性があります。 FCC は、既存のインフラストラクチャを最適化し、寿命を延ばすと同時に、宇宙に関する理解を深めます。

第 1 段階では、地理的、地質学的、および環境に関する主要なデータ収集作業が行われます。

CERN’s main facility, the LHC, will complete its mission around 2040, and the international particle physics community is already working on various options for the design of the accelerator that will succeed it.

One of these options is the Future Circular Collider (FCC), which would be installed in a tunnel measuring some 91 kilometers in circumference at a depth of between 100 and 400 meters on French and Swiss territory, passing under Lake Geneva.

CERN FCC Placement

Two of the possible scenarios for the FCC’s placement. Credit: CERN

The scientific value of the FCC was confirmed by the European Strategy for Particle Physics, which was updated by the CERN Member States in 2020, as the most suitable option to take over from the existing facilities.

CERN was therefore tasked by its Member States with initiating the Feasibility Study.

In 2028, depending on the results of the Study, the Member States will take a decision about the project as a whole, and in particular about the prospects for commissioning the FCC in the 2040s.

For now, CERN will be conducting initial assessments on the ground in order to refine the existing geological and seismic data as well as the data on the fauna and flora for conservation purposes. The first phase will involve a visual inspection of the areas of land concerned, and will be followed in 2024 by seismic studies and drilling. The project’s environmental aspects, namely the geological characteristics of the tunnel and surface sites and the effects on the landscape, will also be studied.

CERN Accelerators Timeline

Timeline of CERN’s main accelerators since the Laboratory was founded and looking ahead to the FCC. Credit: CERN

The results of these assessments will make it possible to refine the placement scenarios and determine which should be prioritized if the project is approved, taking into account both the environmental objectives for the areas on the surface and the underground constraints.

This work is being carried out in conjunction with local stakeholders to ensure that future activities will take all the relevant aspects and different interests into consideration. CERN, France, and Switzerland are working together closely to identify and resolve any issues that might arise from the FCC’s planning and construction, which must respect sustainable development principles. In this regard, CERN has already made environmental commitments in all its areas of activity, based on the “avoid–reduce–compensate” principle. It is working with local stakeholders to ensure that the project is adapted to the local area and its priorities and fosters cooperation, along the lines of the initiative that is already in place to recover waste heat from CERN’s accelerators to heat a nearby residential complex.

Operating as part of one of the most sophisticated scientific complexes in the world, the FCC, if it goes ahead, would optimize and extend the life of the existing infrastructure until the end of the twenty-first century, while helping to further our understanding of the Universe.

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