CERN Accelerating science

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1.
Machine Configuration for the 2023 Proton Run (MD7003) / Fartoukh, Stephane (CERN) ; Dilly, Joschua Werner (CERN) ; Hostettler, Michi (CERN) ; Iadarola, Giovanni (CERN) ; Jacquet, Delphine (CERN) ; Kostoglou, Sofia (CERN) ; Mirarchi, Daniele (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Sterbini, Guido (CERN) et al.
This note contains a condensed summary of the various beam tests which took place in 2022 in order to validate the machine configuration planned to be deployed for the 2023 proton run of the LHC, including in particular a combined ramp and anti-telescopic squeeze, the rotation of the external crossing angle in LHCb, and beam operation with up to 1.8 × 1011 p/b..
CERN-ACC-NOTE-2023-0005.
- 2023.
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2.
HL-LHC Run 4 proton operational scenario / Tomas Garcia, Rogelio (CERN) ; Arduini, Gianluigi (CERN) ; Baudrenghien, Philippe (CERN) ; Bruning, Oliver (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Calaga, Rama (CERN) ; De Maria, Riccardo (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Efthymiopoulos, Ilias (CERN) et al.
Following new findings in beam dynamics and the latest HL-LHC project decisions, an operational scenario has been developed for the first HL-LHC run, Run 4. [...]
CERN-ACC-2022-0001.
- 2022. - 37 p.
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3.
MD2202: compensating long-range beam-beam effectin the LHC using DC wires / Sterbini, Guido (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Arduini, Gianluigi (CERN) ; Bartosik, Hannes (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Cattenoz, Gregory (CERN) ; Effinger, Ewald (CERN) ; Fartoukh, Stephane (CERN) et al.
his note summarizes the program of the LHC Machine Development to assess the potential and limits of the long-range beam-beam compensators held in 2017 (MD2202) [...]
CERN-ACC-NOTE-2019-0052.
- 2019. - 52 p.
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4.
First High-Intensity Beam Tests with Telescopic Flat Optics at the LHC / Fartoukh, Stephane (CERN) ; Azzopardi, Gabriella (University of Malta (MT)) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria ; Dilly, Joschua Werner (Ministere des affaires etrangeres et europeennes (FR)) ; Fol, Elena (Johann-Wolfgang-Goethe Univ. (DE)) ; Fuster Martinez, Nuria (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Hofer, Michael (Vienna University of Technology (AT)) et al.
The paper reports on the first high-intensity beam tests obtained with flat optics in 2018 (MD2148). [...]
CERN-ACC-2019-0052.
- 2019. - 39 p.
5.
Operational Scenario of First High Luminosity LHC Run / Tomás García, Rogelio (CERN) ; Arduini, Gianluigi (CERN) ; Baudrenghien, Philippe (CERN) ; Bruce, Roderik (CERN) ; Brüning, Oliver (CERN) ; Buffat, Xavier (CERN) ; Calaga, Rama (CERN) ; Cerutti, Francesco (CERN) ; De Maria, Riccardo (CERN) ; Dilly, Joschua (CERN) et al.
A new scenario for the first operational run of the HL-LHC era (Run 4) has been recently developed to accommodate a period of performance ramp-up to achieve an annual integrated luminosity close to the nominal HL-LHC design. The operational scenario in terms of beam parameters and machine settings, as well as the different phases, are described here along with the impact of potential delays on key hardware components..
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1846-1849 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1846-1849
6.
Combined ramp and telescopic squeeze / Fartoukh, Stephane (CERN) ; Azzopardi, Gabriella (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria ; Fuster Martinez, Nuria ; Iadarola, Giovanni (CERN) ; Karastathis, Nikos ; Kostoglou, Sofia (CERN) ; Maclean, Ewen Hamish (CERN) et al.
This paper highlights the outcome of the 2018 round ATS MD program, which aimed at demonstrating the feasibility of a combined ramp and telescopic squeeze as a potential key ingredient to operate the machine in Run 3, with much brighter and more energetic beams with respect to Run 2. [...]
CERN-ACC-2020-0028.
- 2020. - 40 p.
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7.
LHC injection optics commissioning in 2021 and 2022 / Persson, Tobias Hakan Bjorn (CERN) ; Carlier, Felix Simon (CERN) ; Dilly, Joschua Werner (CERN) ; Fartoukh, Stephane (CERN) ; Fol, Elena (CERN) ; Garcia Morales, Hector ; Hofer, Michael (CERN) ; Keintzel, Jacqueline (CERN) ; Maclean, Ewen Hamish (CERN) ; Malina, Lukas et al.
LHC injection optics commissioning in 2021 and 2022
CERN-ACC-NOTE-2023-0015.
- 2023.
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8.
MD4147: 50 Hz harmonics perturbation / Kostoglou, Sofia (National Technical Univ. of Athens (GR)) ; Arduini, Gianluigi (CERN) ; Baccigalupi, Carlo ; Bartosik, Hannes (CERN) ; Buffat, Xavier (CERN) ; Burnet, Jean-Paul (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Cerqueira Bastos, Miguel (CERN) ; De Maria, Riccardo (CERN) ; Fartoukh, Stephane (CERN) et al.
Since the beginning of the LHC commissioning, harmonics of 50 Hz have been observed in the beam spectrum. [...]
CERN-ACC-NOTE-2019-0055.
- 2019. - 21 p.
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9.
Optics Measurement and Correction Strategies for HL-LHC / Buffat, Xavier (CERN) ; Carlier, Felix Simon (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria ; De Maria, Riccardo (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Fol, Elena (CERN) ; Fuster Martinez, Nuria ; Gamba, Davide (CERN) ; Garcia Morales, Hector ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) et al.
The baseline strategy for optics commissioning in the HL-LHC era is presented and reviewed in detail, along with recent developments and unsolved matters in the linear and nonlinear optics measurement and correction techniques..
CERN-ACC-2022-0004.
- 2022. - 104 p.
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10.
MD 2563: Optics measurement and corrections with half integer tune / Wegscheider, Andreas (Hamburg University (DE)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Dilly, Joschua Werner (Ministere des affaires etrangeres et europeennes (FR)) ; Fartoukh, Stephane (CERN) ; Fol, Elena (Johann-Wolfgang-Goethe Univ. (DE)) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN) ; Persson, Tobias Hakan Bjorn (CERN) et al.
This note reports on the optics measurement and correction actions that were performed during the study of the LHC at a working point close to the half integer resonance..
CERN-ACC-NOTE-2018-0055.
- 2018. - 11 p.
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