Author: Miyamoto, R.
Paper Title Page
THPME043 The ESS Linac 3320
 
  • M. Eshraqi, H. Danared, R. De Prisco, M. Lindroos, D.P. McGinnis, R. Miyamoto, M. Muñoz, A. Ponton, E. Sargsyan
    ESS, Lund, Sweden
  • I. Bustinduy
    ESS Bilbao, Bilbao, Spain
  • L. Celona
    INFN/LNS, Catania, Italy
  • M. Comunian, F. Grespan
    INFN/LNL, Legnaro (PD), Italy
  • S.P. Møller, H.D. Thomsen
    ISA, Aarhus, Denmark
 
  The European Spallation Source, ESS, uses a linear accelerator to bombard the tungsten target with the high intensity protons beam for producing intense beams of neutrons. The nominal average beam power of the linac is 5~MW with a peak beam power at target of 125~MW. During last year the ESS linac was costed, and to meet the budget a few modifications were introduced to the linac design. One of the major changes is the reduction of final energy from 2.5~GeV to 2.0~GeV and therefore beam current was increased accordingly to compensate for the lower final energy. As a result the linac is designed to meet the cost objective by taking a higher risk. This paper focuses on the driving forces behind the new design, engineering and beam dynamics requirements of the design and finally on the beam dynamics performance of the linac.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME043  
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THPME044 Statistical Error Studies in the ESS Linac 3323
 
  • M. Eshraqi, R. De Prisco, R. Miyamoto, E. Sargsyan
    ESS, Lund, Sweden
  • H.D. Thomsen
    ISA, Aarhus, Denmark
 
  Following the completion of the latest layout of the ESS linac statistical error studies have been performed to define the field vector quality and alignment tolerances. Based on these tolerances and error study results a scheme for the correction system is proposed that assures low losses and permits hands-on maintenance. This paper reports on the strategy of simulating and performing the error studies as well as setting the tolerances.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME044  
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THPME045 Beam Physics Design of the ESS Medium Energy Beam Transport 3326
 
  • R. Miyamoto, B. Cheymol, M. Eshraqi
    ESS, Lund, Sweden
  • I. Bustinduy
    ESS Bilbao, Bilbao, Spain
 
  A radio frequency quadrupole (RFQ) and drift tube linac (DTL) in the ESS proton linac are connected with a medium energy beam transport (MEBT) to remove low intensity bunches on the head and tail of a macro-pulse with a chopper and house diagnostic devices to characterize and adjust the beam out of the RFQ for the DTL. These must be achieved within a relatively short space and without large degradation of beam quality due to space charge force, imposing a challenge on the lattice design. This paper presents a beam physics design of the MEBT in the ESS proton linac, which satisfies its requirement while preserving a decent beam quality.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME045  
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