| Paper |
Title |
Page |
| THPME043 |
The ESS Linac |
3320 |
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- 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
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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.
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| 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 |
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- M. Eshraqi, R. De Prisco, R. Miyamoto, E. Sargsyan
ESS, Lund, Sweden
- H.D. Thomsen
ISA, Aarhus, Denmark
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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.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-THPME044
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| THPME047 |
Sorting in the ESS |
3329 |
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- S. Peggs, E. Laface, E. Sargsyan, R. Zeng
ESS, Lund, Sweden
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Sorting optical elements has significant potential during the construction of superconducting linacs like the ESS, in the same way that it has proved to be very effective in circular accelerators like RHIC and the LHC. In the linac domain, the elements of primary interest are cavities and cryomodules, instead of the magnets (of all sorts) that are routinely sorted in circular accelerators. Multiple cavities can be sorted to optimise individual cryomodules, and cryomodules can be sorted into optimised locations within the tunnel. Different sorting strategies are discussed and preliminarily evaluated in this paper. Central to the evaluation is the identification of goal (or penalty) functions that are maximised (or minimised), and which can be rapidly quantified by simulation. Also crucial is the availability of a modeling system that is realistic in its complex representation of the linac, and which can easily be modified and developed.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-THPME047
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