| Paper |
Title |
Page |
| MOPGW069 |
Recent Beam Performance Achievements with the Pb-Ion Beam in the SPS for LHC Physics Runs |
250 |
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- H. Bartosik, R. Alemany-Fernández, T. Argyropoulos, T. Bohl, H. Damerau, V. Kain, G. Papotti, G. Rumolo, Á. Saá Hernández, E.N. Shaposhnikova
CERN, Geneva, Switzerland
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In the SPS, which is the last accelerator in the LHC ion injector chain, multiple injections of the Pb-ion beam have to be accumulated. On this injection plateau the beam suffers from considerable degradation such as emittance growth and losses. This paper summarises the achievements on improving the beam parameters and maximising the performance of the Pb-ion beam for the LHC physics run in 2018. The results are discussed in view of the target beam parameters of the LHC injectors upgrade project, which is being deployed during the presently ongoing long shutdown.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-MOPGW069
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| About • |
paper received ※ 12 May 2019 paper accepted ※ 17 May 2019 issue date ※ 21 June 2019 |
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| WEPTS040 |
Energy Dependence of the Reproducibility and Injection Efficiency of the LINAC3-LEIR Complex |
3188 |
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- S. Hirlaender
ATI, Vienna, Austria
- H. Bartosik, G. Bellodi, N. Biancacci, V. Kain, Á. Saá Hernández, R. Scrivens
CERN, Geneva, Switzerland
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High intensities in the CERN Low Energy Ion Ring (LEIR) are achieved by stacking several multi-turn injections from the pre-accelerator LINAC3. Up to seven consecutive 200 μs long, 200 ms spaced pulses are injected from LINAC3 into LEIR. An inclined septum magnet combined with a collapsing horizontal orbit bump allows a 6-D phase space painting via a linearly ramped mean momentum along with the LINAC3 pulse and injection at high dispersion. The injected energy distribution measured by the LEIR longitudinal Schottky is correlated with the obtained injection efficiency in this paper. Studies in 2018 revealed that the achievable accumulated intensity of LEIR strongly depends on the longitudinal distribution from LINAC3, which does not stay constant. This paper summarises the experimental results and means to further improve reproducibility and high injection efficiency.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-WEPTS040
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| About • |
paper received ※ 14 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
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| WEPTS042 |
Detailed Characterisation of the LEIR Intensity Limitations for a Pb Ion Beam |
3196 |
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- Á. Saá Hernández, H. Bartosik, N. Biancacci, S. Hirlaender, D. Moreno Garcia, M. Zampetakis
CERN, Geneva, Switzerland
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The equilibrium emittance of the Pb beam in the CERN Low Energy Ion Ring (LEIR) results from the interplay of electron cooling and heating processes, as intra-beam scattering and space charge. In this paper we present the measurements of the emittance evolution as a function of intensity, working point and resonance excitation, and compare them with the simulations of the heating processes. Optimum settings for normal and skew sextupoles have been found for the compensation of resonances excited by the lattice.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-WEPTS042
|
|
| About • |
paper received ※ 18 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
|
| Export • |
reference for this paper using
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※ LaTeX,
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| |