Author: Holm, A.I.S.
Paper Title Page
MOPPD049 The Layout of the High Energy Beam Transport for the European Spallation Source 475
  • A.I.S. Holm, S.P. Møller, H.D. Thomsen
    ISA, Aarhus, Denmark
  The status of the High Energy Beam Transport (HEBT) line for the European Spallation Source (ESS) is presented. The HEBT brings the beam from the underground linac to the target at surface level. The main design objectives of the HEBT, such as space for upgrades, producing the desired target footprint etc. are discussed and the preferred design is shown. Large amplitude particles, a halo, are formed in the last part of the linac. Hence, every given value of the peak current density at the target is correlated with a certain power deposited outside the beam footprint. This correlation is studied and optimized. Furthermore, first studies of the vertical stability of the beam footprint and profile on target due to misalignment or mismatch of the incoming beam are made.  
MOPPD072 A High Energy Collimation System for the European Spallation Source 529
  • H.D. Thomsen, A.I.S. Holm, S.P. Møller
    ISA, Aarhus, Denmark
  At the European Spallation Source (ESS), a ~160 m high energy beam transport (HEBT) system is to guide the high-power (5 MW) proton beam from a superconducting 2.5 GeV linac to a spallation target station. The HEBT could include a single-pass collimation system to protect all downstream accelerator components, including the vital target. The system would be built to withstand both continuous low-power losses (i.e. introduce halo reduction) and infrequent short-term, high-power beam exposure, essentially a fault scenario. Although a collimation system could reduce the uncontrolled beam losses and thus activation levels elsewhere, it takes up precious longitudinal space intended for future beam power upgrades and sets demands for the beam optics, as will be discussed. Possible materials and specifications will also be described.  
THPPP085 End to End Beam Dynamics of the ESS Linac 3933
  • M. Eshraqi, H. Danared, A. Ponton
    ESS, Lund, Sweden
  • I. Bustinduy
    ESS Bilbao, Bilbao, Spain
  • L. Celona
    INFN/LNS, Catania, Italy
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  • A.I.S. Holm, S.P. Møller, H.D. Thomsen
    ISA, Aarhus, Denmark
  • J. Stovall
    CERN, Geneva, Switzerland
  The European Spallation Source, ESS, uses a linear accelerator to deliver a high intensity proton beam to the target station. The nominal beam power on target will be 5~MW at an energy of 2.5~GeV. We briefly describe the individual accelerating structures and transport lines through which we have carried out multiparticle beam dynamics simulations. We will present a review of the beam dynamics from the source to the target.