First Field Measurements of the 15 T Nb3Sn Dipole Demonstrator MDPCT1

• Published in: IEEE transactions on applied superconductivity Vol. 30; no. 4; pp. 1 - 6
• Main Authors: Strauss, Thomas, Barzi, Emanuela, DiMarco, Joseph, Kashikhin, Vadim V., Novitski, Igor, Tartaglia, Michael, Velev, Gueorgui V., Zlobin, Alexander V.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-06-2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers (IEEE)
• Subjects: accelerator magnets; Aluminum; Apertures; Clamps; Coils; Current measurement; Dipoles; electromagnetic measurements; Harmonic analysis; Laminates; Large Hadron Collider; Magnet coils; Magnetic hysteresis; Magnetic measurement; PARTICLE ACCELERATORS; Probes; Protons; Saturation magnetization; Stainless steels; Superconducting magnets
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2020.2970621

Within the US Magnet Development Program (MDP), a 15 T Nb 3 Sn dipole was developed to demonstrate a possible magnet design for a post-LHC proton-proton Collider. The magnet design is based on 60 mm aperture 4-layer shell-type coils, graded between the inner and outer layers to maximize magnet performance. Magnet coils are surrounded by vertically split thick iron laminations, connected by aluminum I-clamps, and a thick stainless-steel skin. The magnet coils were preloaded to achieve 14 T in the first test. The magnet was tested at the Vertical Magnet Test Facility (VMTF) at Fermilab. This paper reports the first results of magnetic measurements of the 15 T Nb 3 Sn dipole demonstrator, including dipole strength, geometrical harmonics, coil magnetization and iron saturation effects. At the maximum quench current of 9742 A we obtained a dipole strength of 14.13 T.