Adaption of the LHC cold mass cooling system to the requirements of the Future Circular Collider (FCC)

Cryogenic Engineering Conference 2017

材料科学;物理学

Kotnig, C.^1,2 ; Tavian, L.^1 ; Brenn, G.^2

CERN, Geneva, Switzerland^1

Graz University of Technology, Graz, Austria^2

关键词: Bayonet heat exchanger;    Control strategies;    Cooling efficiency;    Different distributions;    Distribution systems;    Hydrostatic head;    ITS applications;    Magnet temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012089/pdf
DOI  :  10.1088/1757-899X/278/1/012089

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The cooling of the superconducting magnet cold masses with superfluid helium (He II) is a well-established concept successfully in operation for years in the LHC. Consequently, its application for the cooling of FCC magnets is an obvious option. The 12-kW heat loads distributed over 10-km long sectors not only require an adaption of the magnet bayonet heat exchangers but also present new challenges to the cryogenic plants, the distribution system and the control strategy. This paper recalls the basic LHC cooling concept with superfluid helium and defines the main parameters for the adaption to the FCC requirements. Pressure drop and hydrostatic head are developed in the distribution and pumping systems; their impact on the magnet temperature profile and the corresponding cooling efficiency is presented and compared for different distribution and pumping schemes.