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Emittance Evolution in the LHC: From Injection to Collisions
/ Hostettler, M (CERN) ; Antoniou, F (CERN) ; Efthymiopoulos, I (CERN) ; Fuchsberger, K (CERN) ; Iadarola, G (CERN) ; Karastathis, N (CERN) ; Papadopoulou, S (CERN) ; Papaphilippou, Y (CERN) ; Pellegrini, D (CERN)
The emittance of the LHC beams when arriving in collisions is a key parameter
for luminosity. Hence, the emittance of the beams from the injector complex
needs to be preserved as well as possible throughout the cycle for maximum
luminosity [...]
2019 - 4 p.
- Published in : (2019) , pp. 157-160
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.157-160
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Emittance, Intensity and Luminosity Modelling and Evolution
/ Papadopoulou, S (CERN) ; Antoniou, F (CERN) ; Efthymiopoulos, I (CERN) ; Fartoukh, S (CERN) ; Hostettler, M (CERN) ; Iadarola, G (CERN) ; Karastathis, N (CERN) ; Papaphilippou, Y (CERN) ; Pellegrini, D (CERN) ; Trad, G (CERN)
The LHC luminosity model developed to describe and follow the evolution of the
machine luminosity is presented and compared to 2017 data. The model is based on
the main mechanisms of luminosity degradation, such as intrabeam scattering,
synchrotron radiation, elastic scattering and luminosity burn-off [...]
2019 - 6 p.
- Published in : (2019) , pp. 161-166
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.161-166
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Bunch Luminosity Variations in LHC Run 2
/ Efthymiopoulos, Ilias (CERN) ; Fartoukh, Stephane D (CERN) ; Iadarola, Giovanni (CERN) ; Karastathis, Nikolaos (CERN) ; Papadopoulou, Stefania (CERN) ; Papaphilippou, Yannis (CERN)
The LHC is designed to collide intense bunches of protons with tightly defined conditions, aimed to maximize the delivered recorded integrated luminosity to the experiments. One of these conditions is the maximum level of bunch-to-bunch fluctuation in the luminosity, in particular when levelling at maximum acceptable event rate at the experiments. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 4094-4097
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.4094-4097
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LHC Configuration and Operational Scenario for Run 3
/ Fartoukh, Stephane (CERN) ; Kostoglou, Sofia (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Arduini, Gianluigi (CERN) ; Bartosik, Hannes (CERN) ; Bracco, Chiara (CERN) ; Brodzinski, Krzysztof (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Calviani, Marco (CERN) et al.
After its second successful run period, the Large Hadron Collider (LHC) shut down for three years with the plan of being recommissioned in 2022 for a three-year physics production period, the Run 3. [...]
CERN-ACC-2021-0007.
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2021. - 33 p.
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What do we understand on the Emittance Growth?
/ Papadopoulou, S (CERN) ; Antoniou, F (CERN) ; Efthymiopoulos, I (CERN) ; Hostettler, M (CERN) ; Iadarola, G (CERN) ; Karastathis, N (CERN) ; Kostoglou, S (CERN) ; Papaphilippou, Y (CERN) ; Trad, G (CERN)
In order to describe and follow the evolution of the LHC luminosity, a model
based on the effects of intra-beam scattering, synchrotron radiation, elastic
scattering and luminosity burn-off, was developed. These effects are the main
mechanisms leading to beam emittance growth and losses. [...]
Geneva, Switzerland : , 2019 - 7 p.
- Published in : , pp. 199-205
Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.199-205
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LHC Run 3 Configuration Working Group Report
/ Karastathis, N ; Barnes, M (CERN) ; Bartosik, H (CERN) ; Brodzinski, K (CERN) ; Buffat, X (CERN) ; Cerutti, F (CERN) ; Fartoukh, S (CERN) ; Goddard, B (CERN) ; Iadarola, G (CERN) ; Naour, S Le (CERN) et al.
After its second successful run period, the Large Hadron Collider (LHC) [1]
shuts down for two years with the plan of being recommissioned in 2021 for a
three-year physics production period, the Run 3. The future restart of the LHC
coincides with the completion of the LHC Injectors Upgrade (LIU) project [2],
offering to the LHC the opportunity and the challenge to operate with up to two
times higher beam brightness. [...]
Geneva, Switzerland : , 2019 - 12 p.
- Published in : , pp. 273-284
Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.273-284
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7.
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Luminosity and Lifetime Modeling and Optimization
/ Kostoglou, S (CERN) ; Antoniou, F (CERN) ; Efthymiopoulos, I (CERN) ; Iadarola, G (CERN) ; Karastathis, N (CERN) ; Papadopoulou, S (CERN) ; Papaphilippou, Y (CERN) ; Paraschou, K (CERN) ; Pellegrini, D (CERN) ; Sterbini, G (CERN) et al.
During Run 2, the continuous monitoring of the luminosity evolution has revealed
the existence of lifetime degradation sources, beyond burn-off. By employing a
bunch-bybunch analysis, beam-beam effects but also electron cloud have been
identified as significant contributors to these additional losses. [...]
Geneva, Switzerland : , 2019 - 6 p.
- Published in : , pp. 207-212
Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.207-212
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ebook
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