Towards the conceptual design of the cryogenic system of the Future Circular Collider (FCC)

[摘要] Following the update of the European strategy in particle physics, CERN has undertaken an international study of possible future circular colliders beyond the LHC. The study considers several options for very high-energy hadron-hadron, electron-positron and hadron-electron colliders. From the cryogenics point of view, the most challenging option is the hadron-hadron collider (FCC-hh) for which the conceptual design of the cryogenic system is progressing. The FCC-hh cryogenic system will have to produce up to 120 kW at 1.8 K for the superconducting magnet cooling, 6 MW between 40 and 60 K for the beam-screen and thermal-shield cooling as well as 850 g/s between 40 and 290 K for the HTS current-lead cooling. The corresponding total entropic load represents about 1 MW equivalent at 4.5 K and this cryogenic system will be by far the largest ever designed. In addition, the total mass to be cooled down is about 250'000 t and an innovative cool-down process must be proposed. This paper will present the proposed cryogenic layout and architecture, the cooling principles of the main components, the corresponding cooling schemes, as well as the cryogenic plant arrangement and proposed process cycles. The corresponding required development plan for such challenging cryogenic system will be highlighted.

[发布机构] Technical University of Wroclaw, Wroclaw, Poland^1;CERN, Geneva 23; CH-1211, Switzerland^2;Technische Universitaet Dresden, Germany^3;Shirokuma GmbH, Wetzikon, Switzerland^4;Univ. Grenoble Alpes, CEA, INAC, SBT, Grenoble; F-38000, France^5

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cryogenic system;Development plans;Hadron-hadron collider;Hts current leads;International studies;Possible futures;Thermal shields;Very high energies