Keyword: magnet-design
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MOPLM10 Simulation Study With Septum Field Map for the APS Upgrade septum, simulation, injection, photon 116
  • A. Xiao, M. Abliz, M. Borland
    ANL, Lemont, Illinois, USA
  Funding: Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
One of the biggest challenges faced by the Advanced Photon Source Upgrade injection system design is the septum magnet. Not only does the required leakage field inside the stored beam chamber need to be smaller than for the present ring, the magnet has to be slightly tilted about the z-axis to provide a gentle vertical bend that brings the injected beam trajectory close to y=0 when it passes through the storage ring quadrupole magnets upstream of the straight section. This paper describes the coordinate system transformation necessary to properly model the magnet from field maps. The main field is checked by tracking the injected beam backwards, while leakage fields are included in dynamic aperture simulation and beam lifetime calculation. Simulation results show that the magnet design satisfies the physics requirement.
DOI • reference for this paper ※  
About • paper received ※ 28 August 2019       paper accepted ※ 31 August 2019       issue date ※ 08 October 2019  
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MOPLO20 Quench Performance and Field Quality of the 15 T Nb3Sn Dipole Demonstrator MDPCT1 in the First Test Run dipole, ion-effects, collider, hadron 282
  • A.V. Zlobin, E.Z. Barzi, J.R. Carmichael, G. Chlachidze, J. DiMarco, V.V. Kashikhin, S. Krave, I. Novitski, C.R. Orozco, S. Stoynev, T. Strauss, M.A. Tartaglia, D. Turrioni
    Fermilab, Batavia, Illinois, USA
  Funding: Work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy
U.S. Magnet Development Program (US-MDP) is developing high-field accelerator magnets for a post-LHC hadron collider. In June 2019 Fermilab has tested a new Nb3Sn dipole model, which produced a world record field of 14.1 T at 4.5 K. The magnet design is based on 60 mm aperture 4-layer shell-type coils, graded between the inner and outer layers. The Rutherford cable in the two innermost layers consists of 28 strands 1.0 mm in diameter and the cable in the two outermost layers 40 strands 0.7 mm in diameter. Both cables were fabricated at Fermilab using RRP Nb3Sn composite wires produced by Bruker-OST. An innovative mechanical structure based on aluminum clamps and a thick stainless-steel skin was developed to preload brittle Nb3Sn coils and support large Lorentz forces. The maximum field for this design is limited by 15 T due to mechanical considerations. The first magnet assembly was done with lower coil pre-load to achieve 14 T and minimize the risk of coil damage during assembly. The 15 T dipole demonstrator design and the first results of magnet cold tests including quench performance and magnetic measurements are presented.
DOI • reference for this paper ※  
About • paper received ※ 27 August 2019       paper accepted ※ 03 September 2019       issue date ※ 08 October 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)