Heat Transfer Through the Electrical Insulation of hbox Nb 3 hbox Sn Cables

For the LHC upgrade projects, CERN will rely on the hbox Nb 3 hbox Sn technology to build high field dipole and quadrupole superconducting magnets. In the frame of this R&D program, cooling studies are carried out to determine the heat extraction from this new type of accelerator magnets and the...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2014-06, Vol.24 (3), p.1-5
Main Authors: Granieri, Pier Paolo, Hincapie, Lina, van Weelderen, Rob
Format: Article
Language:English
Subjects:
Construction
Electric cables
Electrical insulation
Heat transfer
Impregnation
Measurement methods
Niobium
Tin
Online Access:Get full text
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Summary:For the LHC upgrade projects, CERN will rely on the hbox Nb 3 hbox Sn technology to build high field dipole and quadrupole superconducting magnets. In the frame of this R&D program, cooling studies are carried out to determine the heat extraction from this new type of accelerator magnets and the relevant quench limits. In this paper, we present and discuss experimental results of heat transfer through the electrical insulation of hbox Nb 3 hbox Sn cables. A cable-stack was prepared using fiberglass sleeves and CTD-101K impregnation resin. Two different measurement methods were compared, consisting of instrumenting the sample before or after the vacuum impregnation. The tests were performed both in 1.9 K superfluid and 4.2 K liquid helium baths, using different heating configurations. We also present results of the numerical model developed to reproduce the experimental results.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2014.2301216