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Dimensional Changes of Nb3Sn Rutherford Cables During Heat Treatment

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Submitted by:
Giorgio Ambrosio
Updated by:
Giorgio Ambrosio
Document Created:
23 Dec 2015, 16:54
Contents Revised:
01 Mar 2016, 12:16
Metadata Revised:
01 Mar 2016, 12:16
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23 Dec 2015, 16:54
In high field magnet applications, Nb3Sn coils undergo a heat treatment step after winding. During this stage, coils expand radially and contract longitudinally due to the Nb3Sn phase change. In order to prevent residual strain from altering superconducting performances, the tooling must provide the adequate space for these dimensional changes. The aim of this study is to understand the behavior of cable dimensions during heat treatment and to provide estimates of the space to be accommodated in the tooling for coil expansion and contraction.
This paper summarizes measurements of dimensional changes on strands, single Rutherford cables, cable stacks, and coils. These samples and coils have been performed within a collaboration between CERN and US LARP Program to develop Nb3Sn quadrupole magnets for the HiLumi LHC. The results are also compared with other high field magnet projects.
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  • pdf (Etienne_Dimensional Changes - ER - V7.pdf, 625.0 kB)
Associated with Events:
MT24 held from 18 Oct 2015 to 23 Oct 2015 in Seoul, Korea
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