Thermal performance of the new superfluid helium vertical test cryostats for magnet tests at CERN

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Vande Craen, A.^1 ; Bajko, M.^1 ; Benda, V.^1 ; Deschamps, J.-B.^1 ; Giloux, C.^1 ; Lees, A.^1 ; Parma, V.^1 ; Pasdeloup, F.^1 ; Pirotte, O.^1

CERN, European Organisation for Nuclear Research, Geneva, Switzerland^1

关键词: Controlled temperature;    Design enhancement;    Design features;    Large Hadron collider LHC;    Magnet tests;    Measurements of;    Stored energy;    Thermal Performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012081/pdf
DOI  :  10.1088/1757-899X/502/1/012081

来源: IOP

【 摘 要 】

In the frame of the RD program of the HL-LHC, the upgrade of the Large Hadron Collider (LHC), CERN augmented its test facility with two new large-scale vertical test stations for superconducting magnet testing. The cryostats composing the core of these test stations share design features but are of different dimensions: one allows testing magnets up to 1.5 m diameter, 2.5 m long for a maximum weight of 15 t, while the other can accommodate magnets up to 0.9 m diameter, and 5.5 m long for a maximum weight of 18 t. These test stations are designed to operate at 1.3 bar and at controlled temperatures in the range 1.9-4.5 K. They can provide for safe dissipation of stored energy in the magnet coils of up to 10 MJ. After a brief description of the cryostats, this paper describes the qualification measurements of heat loads at 4.5 K and 1.9 K of both cryostats, some design enhancements that were made and the performance improvements obtained.Published under licence by IOP Publishing Ltd.