Conveners
Infrastructure and operation: Cryogenics
- Laurent Jean Tavian (CERN)
Infrastructure and operation: Implementation aspects
- Laetita D'Aloia (CETU (France))
Infrastructure and operation: Safety and technical infrastructure
- Saverio La Mendola (CERN)
Based on preliminary design works from research institutes, engineering studies were performed by the world-leader industries, Linde and Air Liquide, to assess the conceptual design for the FCC-hh cryoplants with industrial solutions and/or innovative technologies. For such high performance hadron collider, the cryogenic system has to distribute very large cooling capacities all along the...
The final beam-focussing quadrupoles, the so-called inner triplets, are located immediately before the interaction points and receive high specific heat loads with an unequal spatial distribution. Despite the installation of a tungsten shield which absorbs the major part of the emitted photons at an intermediate temperature level of about 50 K, the remaining radiative power falling on the cold...
The further development of turbo-compressors has shown that improvements in design are possible by matching the design of the cryogenic cycle to that of the compressor. Different possibilities of the beam screen Nelium Turbo-Brayton cycle arrangement are analysed. The cryogenic cycles with different arrangements of the pre-cooling turbine are studied and compared including the number of...
Computational simulations of superfluid helium are needed in order to improve the design of the cooling system of superconducting magnets in particle accelerators and to achieve a better understanding of the transient phenomena during magnet quenches. A conjugate heat transfer numerical model based on the C++ toolbox OpenFOAM is implemented to three-dimensional case studies involving...
This session will present the main institutional and administrative challenges for the FCC implementation, in particular the compliance with the two Host States’ specific legal requirements in a unique environment.
This presentation summarizes the civil infrastructure required to accommodate the hadron and lepton machines proposed for the Future Circular Collider. With the aid of a bespoke web-based tool, the position of the FCC tunnel has been optimised by integrating aspects such as geology, surface constraints and particular functional requirements of the tunnel system. This presentation will describe...
This talk precedes to the presentation “A first overview of the legal and technical framework for the reuse of FCC’s proposed excavated spoil material” and focuses on advanced online technologies for analysing the excavated materials. In that regard, Industry 4.0 gains great attention and a high priority status. It will give an outlook for proposed important information regarding requirements...
This presentation follows the talk “Excavation material use strategy’” and will give an overview of the current technical and legal situation for the reuse of FCC’s proposed excavated spoil material. First results based on mineralogical, geotechnical and petrophysical analyses will be presented that are directed by the legal framework of national (France and Switzerland) as well as European...
One of the aims of the FCC CDR was to demonstrate that a high-energy accelerator in a 100 km tunnel could be built and operated safely without putting human life at danger. The safety-performance based design method (chosen for the CDR) showed that life safety for potential fire and oxygen deficiency scenarios was assured for a tunnel separated into 440 m long compartments with fire resistant...
The current CDR sets a ventilation strategy developed together with EN/CV. CFD simulations of the inflow and outflow requirements of such a new system are necessary to properly size it and ensure performance with all different credible and degraded scenarios (e.g. fire). Additionally, a detailed study on the mechanical smoke dampers and required fire resistance of the ducts will help on...
At energies up to 50 TeV, understanding the impact of beam interactions with the residual gas along the vacuum chamber is essential during the design of the FCC-hh. Despite the ultra high vacuum (UHV) environment, secondary showers generated by such interactions produce a range of detrimental effects and place constraints on the maximum possible gas density.
A 214 m long FCC arc cell has...
In the last year some preliminary work on planning for the FCC has been carried out for both the geodetic infrastructure required and the survey and alignment activities. It is necessary to have the geodetic infrastructure in place before the civil engineering works start, some aspects even before the call for tender, and to start research into more precise techniques and instrumentation for...
