MOC —  WGC - Accelerator System   (04-Oct-21   10:00—11:00)
Paper Title Page
Proposal of a 1 A-Class Deuteron Single-Cell Linac  
  • H. Okuno
    RIKEN Nishina Center, Wako, Japan
  A 1-ampere-class high-intensity deuteron linac is proposed for mitigating long-lived fission products (LLFPs) by nuclear transmutation. This accelerator does not have an RFQ linac as a front-end accelerator and consists of single-cell rf cavities with magnetic focusing elements to accelerate deuterons beyond 1 A up to 200 MeV/u.The concept of this accelerator and simulation results on beam dynamics will be presented in this talk.  
slides icon Slides MOCC1 [1.593 MB]  
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First Experience with Nb₃Sn Accelerator Magnets  
  • G. Ambrosio
    Fermilab, Batavia, Illinois, USA
  Funding: Work supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, through the US LHC Accelerator Upgrade Project (AUP), and by the High Luminosity LHC project at CERN.
The US HL-LHC Accelerator Upgrade Project (AUP) and the HL-LHC Project at CERN are producing low-beta quadrupoles to be used in the Inner Triplet elements of the High Luminosity Large Hadron Collider (HL-LHC). In the US, coils and magnets are being fabricated at peak production rate and coil fabrication is ~50% complete. Five magnets have been tested in vertical cryostat, and four of them have been accepted for use in Q1/Q3 cold masses. At CERN two prototypes have been assembled and tested in horizontal cryostat. This talk presents main results from fabrication and test of these components. In addition, it discusses main lessons learned and steps needed for large scale production of Nb3Sn accelerator magnets.
slides icon Slides MOCC2 [7.933 MB]  
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MOCC3 First Experience of Crystal Collimators During LHC Special Runs and Plans for the Future 12
  • M. D’Andrea, V. Avati, R. Bruce, M.E.J. Butcher, M. Deile, M. Di Castro, H. Garcia Morales, S. Jakobsen, J. Kašpar, I. Lamas Garcia, A. Masi, A. Mereghetti, D. Mirarchi, S. Redaelli, B. Salvachua, P. Serrano Galvez, M. Solfaroli Camillocci
    CERN, Geneva, Switzerland
  • B.S. Dziedzic, K.M. Korcyl
    IFJ-PAN, Kraków, Poland
  • Yu.A. Gavrikov
    PNPI, Gatchina, Leningrad District, Russia
  • K.H. Hiller
    DESY Zeuthen, Zeuthen, Germany
  • N. Turini
    UNISI, Siena, Italy
  Bent crystals can deflect charged particles by trapping them within the potential well generated by neighboring crystalline planes and forcing them to follow the curvature of the crystal itself. This property has been extensively studied over the past decade at the CERN accelerator complex, as well as in other laboratories, for a variety of applications, ranging from beam collimation to beam extraction and in-beam fixed target experiments. In 2018, crystal collimators were operationally used for the first time at the Large Hadron Collider (LHC) during a special high-beta* physics run with low-intensity proton beams, with the specific goal of reducing detector background and achieving faster beam halo removal. This paper describes the preparatory studies carried out by means of simulations, the main outcomes of the special physics run and plans for future uses of this innovative collimation scheme, including the deployment of crystal collimation for the High-Luminosity LHC upgrade.  
slides icon Slides MOCC3 [2.138 MB]  
DOI • reference for this paper ※  
About • Received ※ 03 October 2021 — Accepted ※ 22 November 2021 — Issue; date; ※; 13 January 2022  
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Muon Production Target Developments for PSI’s High Intensity Proton Accelerator  
  • D.C. Kiselev, P. Baumann, P.-A. Duperrex, M. Haj Tahar, S. Jollet, S. Joray, P.R. Kettle, D. Laube, A. Papa, D. Reggiani, T. Rostomyan, P. Schwendimann, R. Sobbia, V. Talanov
    PSI, Villigen PSI, Switzerland
  • A. Papa
    INFN-Pisa, Pisa, Italy
  The high intensity proton accelerator (HIPA) at the Paul Scherrer Institut (PSI) delivers 590 MeV c.w. proton beam with currents of up to 2.4 mA, i.e. 1.4 MW beam power, which is at the forefront of current particle accelerators. Before dumping it into the spallation target SINQ for thermal and cold neutrons, the beam feeds two meson production targets Target M and Target E used for producing intense pion and muon beams for experiments of nuclear and material research. The targets consist of graphite wheels of effective thicknesses of 5 mm (Target M) and 40 mm or 60 mm (Target E). In 2019 two new graphite target designs were tested at Target Station E. One target type was aiming for better monitoring the beam position at the target, the other one improved the surface muon rate by 30 to 50 % depending on the viewing angle of the beam line. The second target type, called ’slanted’, is also foreseen for the upgrade of the Target Station M, the High Intensity Muon Beam project. First ideas towards the realization in 2028 will be presented.  
slides icon Slides MOCC4 [2.908 MB]  
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