August 27, 2017 to September 1, 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Thermomechanical behavior of the HL-LHC 11 tesla Nb3Sn magnet coil constituents during reaction heat treatment

Aug 30, 2017, 1:15 PM
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m F8 - Structural Materials for Magnets Wed-Af-Po3.10


Mr Christian Scheuerlein (CERN)


The superconducting magnets for the LHC High Luminosity upgrade (HL-LHC) are built using Nb3Sn technology, which implies a reaction heat treatment when the conductor is at final shape. During the reaction heat treatment the Nb3Sn coil is surrounded by a fixture that restricts the coil volume changes. The knowledge of the evolution of the thermo-mechanical properties of the coil materials and of the reaction fixture during the heat treatment is required in order to predict the coil geometry and stress state by Finite Element simulations. We have measured the Young’s and shear moduli of the HL-LHC 11 T Nb3Sn magnet coil and reaction tool constituents with the non-destructive dynamic methods resonance and impulse excitation during in situ heat cycles in the temperature range -60°C to 700°C. The 4.2 K elastic properties are obtained by fitting and extrapolating these results. The thermal expansion of the coil components was measured by dilation experiments.

Submitters Country Switzerland

Primary authors

Mr Christian Scheuerlein (CERN) Friedrich Lackner (CERN) Frederic Savary (CERN) Dr Birgit Rehmer (Federal Laboratory for Materials Research (BAM)) Mrs Monika Finn (Federal Laboratory for Materials Research (BAM)) Mr Christian Meyer (Federal Laboratory for Materials Research (BAM))

Presentation materials