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2021-01-26
15:23
Two-particle azimuthal correlations in photonuclear ultraperipheral Pb+Pb collisions at 5.02 TeV with ATLAS
Two-particle long-range azimuthal correlations are measured in photonuclear collisions using 1.7 nb$^{-1}$ of 5.02 TeV Pb+Pb collision data collected by the ATLAS experiment at the LHC. [...]
CERN-EP-2020-246. - 2021.
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2021-01-26
06:29
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. [...]
Geneva, Switzerland, 2019. - 12 p.
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2021-01-26
06:29
Experiment Requests and Constraints for Run 3 / Petersen, B Aa (CERN) ; Schwick, C (CERN)
During Long Shutdown 2, all LHC experiments will undergo upgrades to improve their performance and, in case of LHCb and ALICE, enable running at significantly higher luminosity. [...]
2019. - 5 p.
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2021-01-26
06:29
Session 5: A preliminary Look Ahead / Pojer, M (CERN) ; Buffat, X (CERN)
The fifth session of the Evian workshop was dedicated to discussions on the expected setup of the LHC during Run 3, including the evolution of the injected beam parameters as the LIU is commissioned, the expectations from the experiments and the LHC configuration..
Geneva, Switzerland, 2019. - 2 p.
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2021-01-26
06:29
LHC Longitudinal Beam Dynamics during Run 2 / Timko, H (CERN) ; Argyropoulos, T (CERN) ; Baudrenghien, P (CERN) ; Calaga, R (CERN) ; Długosz, D (CERN) ; Müller, J F Esteban (CERN) ; Karpov, I (CERN) ; Medrano, L E Medina (CERN) ; Palm, M (CERN) ; Salvachua, B (CERN) et al.
During the LHC Run 2, many advances have been made on the beam dynamics in the longitudinal plane. [...]
Geneva, Switzerland, 2019. - 7 p.
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2021-01-26
06:29
Transverse Instabilities / Buffat, X (CERN) ; Amorim, D (CERN) ; Antipov, S (CERN) ; Arduini, G (CERN) ; Biancacci, N (CERN) ; Carver, L (CERN) ; Furuseth, S V (CERN) ; Iadarola, G (CERN) ; Li, K (CERN) ; Mether, L (CERN) et al.
The observations of coherent instabilities in all operational phases of the LHC during Run 2 are summarised, describing their impact on the performance. [...]
Geneva, Switzerland, 2019. - 11 p.
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2021-01-26
06:29
Electron Cloud and Heat Loads in Run 2 / Iadarola, G (CERN) ; Bradu, B (CERN) ; Dijkstall, P (CERN) ; Mether, L (CERN) ; Romano, A (CERN) ; Rumolo, G (CERN) ; Skripka, G (CERN) ; Tavian, L (CERN)
During Run 2, the 25 ns bunch spacing was routinely used for proton physics operation at the LHC. [...]
Geneva, Switzerland, 2019. - 12 p.
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2021-01-26
06:29
Special Losses during LHC Run 2 / Mirarchi, D (Manchester U. ; CERN) ; Arduini, G (CERN) ; Giovannozzi, M (CERN) ; Lechner, A (CERN) ; Redaelli, S (CERN) ; Wenninger, J (CERN)
A comprehensive review of special beam loss scenarios during Run 2 is presented, with main focus on studies and actions taken to mitigate their impact on LHC operations. [...]
Geneva, Switzerland, 2019. - 8 p.
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2021-01-26
06:29
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. [...]
Geneva, Switzerland, 2019. - 6 p.
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2021-01-26
06:29
Session 4: Beam Performance during Run 2 / Schaumann, M (CERN) ; Sterbini, G (CERN)
During Session 4 of the 9 th LHC Operations Evian Workshop, the LHC beam performance during Run 2 was presented and discussed. [...]
Geneva, Switzerland, 2019. - 5 p.
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