Thermal Analysis of HeII - cooled Nb3Sn Superconducting Coil Samples for the HL-LHC project

Submitted by ogomezal on Thu, 06/24/2021 - 18:06


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Heat transfer studies on He II - cooled Nb3Sn magnet samples have been carried out at the Central Cryogenics Laboratory at CERN. The heat load is generated either via AC losses induced by a superconducting coil external to the samples or with a kapton covered foil-heater placed on the outer surface for two of the samples, while measuring the temperature of the cable layers in situ. The transient thermal response of the samples is used to estimate the helium content within the samples.

A numerical model has been developed using open-source software to simulate the experiment.

The robustness of the numerical solver has been validated with experiment data, in particular across the domain of the heat loads used in the experiments and will be used to extend its application to models of the full magnet coil layers with distributed power deposition as expected during accelerator operation.

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