TY - JOUR A1 - Scheuerlein, C. A1 - Uhlemann, Patrick A1 - Finn, Monika A1 - Lackner, F. A1 - Savary, F. T1 - Mechanical properties of the HL-LHC 11 T Nb3Sn magnet constituent materials JF - IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY N2 - A test campaign was launched to determine the mechanical properties of the High Luminosity-Large HadronCollider (HL-LHC) 11 T Nb3Sn magnet components. The results can be used to accurately represent the mechanical properties in finite elementmodels that predict the stress and strain distribution in these magnets. Particular attention is paid to anisotropic mechanical behavior of the different magnet materials. Static and dynamic test methods have been applied for determining elastic materials’ behavior, and highly accurate Young’s moduli are obtained with the nondestructive dynamic methods resonance and impulse excitation at ambient temperature and during in situ heat cycles. KW - Superconducting magnets KW - Young’s modulus KW - Resonance testing KW - Stress-strain behavior PY - 2017 DO - https://doi.org/10.1109/TASC.2016.2638046 SN - 1051-8223 SN - 1558-2515 VL - 27 IS - 4 SP - 1 EP - 7 PB - IEEE AN - OPUS4-39219 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Scheuerlein, C. A1 - Finn, Monika A1 - Meyer, Christian A1 - Lackner, F. A1 - Savary, F. A1 - Rehmer, Birgit T1 - Thermomechanical Behavior of the HL-LHC 11 Tesla Nb3Sn Magnet Coil Constituents During Reaction Heat Treatment JF - IEEE Transactions on applied superconductivity N2 - The knowledge of the temperature-induced changes of the superconductor volume and of the thermomechanical behavior of the different coil and tooling materials is required for predicting the coil geometry and the stress distribution in the coil after the Nb3Sn reaction heat treatment. In this paper, we have measured the Young’s and shear moduli of the HL-LHC 11 T Nb3Sn dipole magnet coil and reaction tool constituents during in situ heat cycles with the dynamic resonance method. The thermal expansion behaviors of the coil components and of a free standing Nb3Sn wire were compared based on dilation experiments. KW - Superconducting magnet KW - Young`s modulus KW - Thermal expansion KW - Stress-strain-behavior PY - 2018 DO - https://doi.org/10.1109/TASC.2018.2792485 SN - 1051-8223 SN - 1558-2515 VL - 28 IS - 3 SP - 4003806 - 1 EP - 4003806 - 6 PB - IEEE Council on Superconductivity CY - New York AN - OPUS4-44020 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pulikowski, D. A1 - Lackner, F. A1 - Scheuerlein, C. A1 - Meinel, Dietmar A1 - Savary, F. A1 - Tommasini, D. A1 - Pajor, M. T1 - Testing mechanical behavior of Nb3Sn Rutherford cable during coil winding T2 - IEEE Transactions on Applied Superconductivity N2 - In the framework of the development of high field magnets made of Nb3Sn superconductor for projects like HL-LHC and FCC studies, it is needed to refine the understanding of the coil winding process and its impact on the overall mechanical behavior of the conductor. For this purpose, a new cable winding setup has been developed in order to compare the windability of different Nb3Sn Rutherford cables. In addition, various geometrical cable inspection methods were tested and compared. First experimental results obtained with the new set-up for winding tests are summarized. T2 - 2016 Applied Superconductivity Conference (ASC’16) CY - Denver, Colorado, USA DA - 04.09.2016 KW - Coil winding KW - Rutherford cable KW - X-ray absorption tomography PY - 2017 DO - https://doi.org/10.1109/TASC.2017.2656179 SN - 1051-8223 SN - 1558-2515 VL - 27 IS - 4 SP - 1 EP - 4 PB - IEEE AN - OPUS4-39357 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gradt, Thomas A1 - Scheuerlein, Ch. A1 - Lackner, F. A1 - Savary, F. T1 - Friction coefficient between the Ti6Al4V loading pole and the 316LN steel shims of the HL-LHC 11 T magnets JF - IEEE Transactions on Applied Superconductivity N2 - The paper deals with a tribosystem in the magnet system of the Large Hadron Collider High Luminosity upgrade (HL-LHC) project. KW - Accelerator magnets KW - Friction KW - Molybdenum disulphide KW - Solid lubricants KW - Superconducting magnets PY - 2018 DO - https://doi.org/10.1109/TASC.2018.2792469 VL - 28 IS - 3 SP - 4005703 PB - IEEE AN - OPUS4-44621 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Finn, Monika A1 - Uhlemann, Patrick A1 - Meyer, Christian A1 - Scheuerlein, C. A1 - Amez-Droz, M. A1 - Meuter, F. A1 - Konstantopoulou, K. A1 - Savary, F. A1 - Tock, J.-P. T1 - Thermomechanical properties of polymers for use in superconducting magnets JF - IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY N2 - The coefficient of thermal expansion (CTE) and the thermomechanical properties of the polymers used in superconducting magnets need to be known in order to predict their stress state under the different magnet assembly and operating conditions. We have measured Young’s moduli of typically used polymers during in situ heat cycles with the dynamic resonancemethod. The dynamic test results are compared with Young’s moduli determined from quasi-static stress–strain measurements at room temperature, 77 K and 4.2 K. A moderate elastic anisotropy is found for the fiber reinforced polymers. CTEs are compared based on dilation experiments. TheCTEs of the fiber reinforced polymers studied are similar to those of copper or steel. In contrast, the pure resins exhibit relatively larger CTEs. KW - Polymer KW - Superconducting magnet KW - Young´s modulus KW - Stress-strain behavior KW - Resonance testing KW - Coefficient of thermal expansion PY - 2019 DO - https://doi.org/10.1109/TASC.2019.2898321 SN - 1051-8223 SN - 1558-2515 VL - 29 IS - 5 SP - 7701605, 1 EP - 5 PB - IEEE AN - OPUS4-47616 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -