Mechanical Comparison of Short Models of Nb3 Sn Low-β Quadrupole for the Hi-Lumi LHC

• Published in: IEEE transactions on applied superconductivity Vol. 31; no. 5; pp. 1 - 6
• Main Authors: Takala, E., Ambrosio, G., Bourcey, N., Bianchi, L., Cheng, D. W., Ferracin, P., Guinchard, M., Bermudez, S. Izquierdo, Mangiarotti, F., Pan, H., Perez, J. C., Prestemon, S., Troitino, J. Ferradas, Vallone, G., Sequeiro, C. Castro, Troitino, S. Ferradas
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers (IEEE)
• Subjects: Coils; Conductors; fiber bragg grating; Finite element analysis; Large Hadron Collider; Luminosity; Magnetomechanical effects; Magnets; Mechanical properties; Nb3Sn wire; Nb<inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <tex-math notation="LaTeX"> _{\text{3}}</tex-math> </inline-formula>Sn wire; Numerical models; optical fiber; PARTICLE ACCELERATORS; Position measurement; Quadrupoles; Shape; strain measurement; Stress; Stress measurement; Superconducting magnets
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2021.3057573

MQXF is the Nb<inline-formula><tex-math notation="LaTeX">_3</tex-math></inline-formula> Sn Low-<inline-formula><tex-math notation="LaTeX">\beta</tex-math></inline-formula> quadrupole magnet that the HL-LHC project is planning to install in the LHC interaction regions in 2026 to increase the LHC integrated luminosity. The magnet will be fabricated in two different lengths: 4.2 m for MQXFA, built in the US by the Accelerator Upgrade Project (AUP), and 7.15 m for MQXFB, fabricated by CERN. In order to qualify the magnet design and characterize its performance with different conductors, cable geometries and pre-load configurations, five short model magnets, called MQXFS, were fabricated, assembled and tested. We compare the mechanical behavior of short model magnets using experimental data and new numerical models that take into account the measured coil sizes as a function of position.