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Proceedings Paper

Thermodynamic modeling of enhanced superconducting cable insulation for the proposed upgrade of the LHC inner triplet Nb-Ti quadrupole magnets
Author(s): Dariusz Bocian
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Paper 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.

Paper Details

Date Published: 25 October 2013
PDF: 13 pages
Proc. SPIE 8903, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013, 89031G (25 October 2013); doi: 10.1117/12.2042140
Show Author Affiliations
Dariusz Bocian, The Henryk Niewodniczański Institute of Nuclear Physics (Poland)


Published in SPIE Proceedings Vol. 8903:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013
Ryszard S. Romaniuk, Editor(s)

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