%0 journal article
%@ 1051-8223
%A Wolf, F., Scheuerlein, C., Lorentzon, M., Katzer, B., Hofmann, M., Gan, W., Lackner, F., Schoerling, D., Tommasini, D., Savary, F., Bottura, L.

%D 2019
%J IEEE Transactions on Applied Superconductivity
%N 5
%P 8400605 
%R doi:10.1109/TASC.2019.2893495
%T Effect of Applied Compressive Stress and Impregnation Material on Internal Strain and Stress State in Nb3Sn Rutherford Cable Stacks
%U https://doi.org/10.1109/TASC.2019.2893495
5 
%X The Nb3Sn superconductor in accelerator magnets must resist high mechanical stresses. In order to better understand the effect of the coil impregnation system on the stresses exerted on the strain-sensitive Nb3Sn superconductor, we have measured the elastic strain evolution in the conductor constituents under externally applied loads. For this purpose, a dedicated load frame that enables rotation of the sample load axis with respect to the neutron scattering geometry was installed in the Stress-Spec beamline at the neutron source Heinz Maier-Leibnitz FRM II. The Nb3Sn- and Cu-loading strains were measured in situ by neutron diffraction under monotonic and cyclic compressive loading. So-called ten-stack samples composed of Nb3Sn Rutherford type cables with different impregnation and coil blocks extracted from an 11 T dipole short model coil were investigated.