Thermodynamic modeling of enhanced superconducting cable insulation for the proposed upgrade of the LHC inner triplet Nb-Ti quadrupole magnets

Dariusz Bocian

doi:10.1117/12.2042140

25 October 2013 Thermodynamic modeling of enhanced superconducting cable insulation for the proposed upgrade of the LHC inner triplet Nb-Ti quadrupole magnets

Dariusz Bocian

Author Affiliations +

Proceedings Volume 8903, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013; 89031G (2013) https://doi.org/10.1117/12.2042140
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013, 2013, Wilga, Poland

Abstract

The results of thermal modeling of a new cable insulation scheme proposed for a new set of larger aperture Nb-Ti inner triplet quadrupole magnets for LHC upgrade are presented. The new insulation scheme, so called enhanced insulation, is aiming at a more efficient heat transport from the coil to the helium bath. This scheme relies on leaving open helium paths between the bath and the cable. This report summarizes a detailed study of helium cooling channels efficiency in enhanced cable insulation as well as the heat evacuation schemes with respect to different cable insulation winding scheme. A numerical calculations and validation with experimental results showed that heat transfer efficiency of enhanced insulation is reduced, indicating that effective helium channels cross-sections are significant smaller than the nominal ones. The ANSYS analysis confirmed a significant decrease of helium channels cross-section caused by applied pressure. Also a new independent calculation of heat transfer confirmed the results presented in this paper.

Citation Download Citation

Dariusz Bocian "Thermodynamic modeling of enhanced superconducting cable insulation for the proposed upgrade of the LHC inner triplet Nb-Ti quadrupole magnets", Proc. SPIE 8903, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013, 89031G (25 October 2013); https://doi.org/10.1117/12.2042140

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