Speaker
Description
The cool-down and cryostating of the FCC superconducting magnets requires transport and distribution of large quantities of cryogens over distance up to 10 km. It significantly exceeds the experience gained from the existing Big Science helium cryogenic systems. To limit the pressure drop and the distribution header diameters, cryogens could be distributed at high pressure up to 50 bar. Such a choice would result in significant thermo-mechanical challenges, which must be addressed when designing the cryogenic distribution system (CDS) and the superconducting magnet cryostats. The paper presents possible CDS design solutions optimized with entropy minimization method analysis. The advantages of stainless steel replacement with invar are discussed. The FCC cryogenic system reliability issues are discussed.
