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Second-order dispersion measurement in LHC
/ Keintzel, Jacqueline (TU Vienna ; CERN) ; Coello De Portugal - Martinez, Jaime (CERN) ; Dilly, Joschua (CERN) ; Fol, Elena (CERN) ; Garcia-Tabares, Ana (CERN) ; Hofer, Michael (CERN ; TU Vienna) ; Maclean, Ewen (CERN) ; Malina, Lukas (CERN) ; Persson, Tobias (CERN) ; Tomás, Rogelio (CERN) et al.
The quadratic dependence of the orbit on the relative momentum ofset, also known as second-order dispersion, is analysed for the first time for the LHC. In this paper, the measurement and analysis procedure are described. [...]
CERN-ACC-2019-136.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPMP027
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPMP027
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Optics Correction Strategy for Run 3 of the LHC
/ Persson, Tobias (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; De Maria, Riccardo (CERN) ; Dilly, Joschua (CERN) ; Fol, Elena (CERN) ; Garcia Morales, Hector (CERN) ; Hofer, Michael (CERN) ; Høydalsvik, Eirik (CERN) ; Keintzel, Jacqueline (CERN) ; Le Garrec, Mael (CERN) et al.
The Run 3 of the LHC will continue to provide new challenges for optics corrections. In order to succeed and go beyond what was achieved previously, several new methods to measure and correct the optics have been developed. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) WEPAB027
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.WEPAB027
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Optics Measurement by Excitation of Betatron Oscillations in the CERN PSB
/ Maclean, Ewen H (CERN) ; Antoniou, Fanouria (CERN) ; Asvesta, Foteini (CERN) ; Bartosik, Hannes (CERN) ; Bracco, Chiara (CERN) ; Dilly, Joschua W (CERN) ; Fol, Elena (CERN) ; Garcia Morales, Hector (CERN) ; Hofer, Michael (CERN) ; Keintzel, Jacqueline (CERN) et al.
Optics measurement from analysis of turn-by-turn BPM data of betatron oscillations excited with a kicker magnet has been employed very successfully in many machines but faces particular challenges in the CERN PSB where BPM to BPM phase advances are sub-optimal for optics reconstruction. Experience using turn-by-turn oscillation data for linear optics measurements during PSB commissioning in2021 is presented, with implications for the prospect of such techniques in the PSB more generally..
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC '21 (2021) 4078-4081
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.4078-4081
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Optics Measurements and Correction Plans for the HL-LHC
/ Persson, Tobias (CERN) ; Buffat, Xavier (CERN) ; Carlier, Felix (CERN) ; Coello de Portugal, Jaime Maria (PSI, Villigen) ; De Maria, Riccardo (CERN) ; Dilly, Joschua (CERN) ; Fol, Elena (CERN) ; Gamba, Davide (CERN) ; Garcia Morales, Hector (CERN) ; García-Tabarés Valdivieso, Ana (CERN) et al.
The High Luminosity LHC (HL-LHC) will require stringent optics correction to operate safely and deliver the design luminosity to the experiments. In order to achieve this, several new methods for optics correction have been developed. [...]
2021 - 4 p.
- Published in : 10.18429/JACoW-IPAC2021-WEPAB026
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.2656-2659
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Optics Correction Strategy for Run 3 of the LHC
/ Persson, Tobias (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; Carlier, Felix (CERN) ; Costa Ojeda, Andressa (CERN) ; Dilly, Joschua (CERN) ; Ferrentino, Vittorio (CERN) ; Fol, Elena (CERN) ; García Morales, Hector (CERN) ; Hofer, Michael (CERN) ; Høydalsvik, Eirik (CERN) et al.
After more than 3 years of shutdown the LHC is again operational in 2022. Experience from the previous Long Shutdown (LS) has shown that the local errors in the triplet quadrupoles changed significantly between Run 1 and Run 2, and first measurements in 2022 unveil further changes. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1687-1690
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1687-1690
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Prospects for optics measurements in FCC-ee
/ Keintzel, Jacqueline (CERN) ; Tomás García, Rogelio (CERN) ; Zimmermann, Frank (CERN)
Within the framework of the Future Circular Collider Feasibility Study, the design of the electron-positron collider FCC-ee is optimised, as a possible future double collider ring, currently foreseen to start operation during the 2040s. With close to 100 km of circumference and strong synchrotron radiation damping at highest beam energy, adequate beam measurements are needed to control the optics at the desired level. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 827-830
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.827-830
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HE-LHC optics design options
/ Keintzel, Jacqueline (CERN ; TU Vienna) ; Crouch, Matthew (CERN) ; Hofer, Michael (CERN ; TU Vienna) ; Risselada, Thys (CERN) ; Tomás, Rogelio (CERN) ; Zimmermann, Frank (CERN) ; van Riesen-Haupt, Léon (Oxford U. ; JAI, UK)
The High Energy Large Hadron Collider (HE-LHC), a possible successor of the High Luminosity Large Hadron Collider (HL-LHC) aims at reaching a centre-of-mass energy of about 27 TeV using basically the same 16 T dipoles as for the hadron-hadron Future Circular Collider FCC-hh. Designing the HE-LHC results in a trade off between energy reach, beam stay clear as well as geometry offset with respect to the LHC. [...]
CERN-ACC-2019-069.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPMP026
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPMP026
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Integrated Full HE-LHC Optics and Its Performance
/ Hofer, Michael (Vienna U. ; CERN) ; Crouch, Matthew (CERN) ; Keintzel, Jacqueline (CERN ; Vienna U.) ; Nosochkov, Yuri (SLAC) ; Risselada, Thys (CERN) ; Tomás, Rogelio (CERN) ; Zhou, Demin (KEK, Tsukuba) ; Zimmermann, Frank (CERN) ; van Riesen-Haupt, Léon (JAI, UK)
One possible future hadron collider design investigated in the framework of the Future Circular Collider (FCC) study is the High-Energy LHC (HE-LHC). Using the 16 T dipoles developed for the FCC-hh the center of mass energy of the LHC is set to increase to 27 TeV. [...]
CERN-ACC-2018-071.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMK002
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMK002
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FCC-ee Lattice Design
/ Keintzel, Jacqueline (CERN) ; Abramov, Andrey (CERN) ; Benedikt, Michael (CERN) ; Hofer, Michael (CERN) ; Hunchak, Patrick (Saskatchewan U.) ; Oide, Katsunobu (CERN) ; Raubenheimer, Tor (SLAC) ; Tomás García, Rogelio (CERN) ; Zimmermann, Frank (CERN)
Within the framework of the Future Circular Collider Feasibility and Design Study, the design of the electron-positron collider FCC-ee is being optimised, as a possible future double collider ring, currently foreseen to start operation during the 2040s. FCC-ee is designed to operate at four different energy stages, allowing for precision measurements: from the Z-pole up to above the ttbar-threshold. [...]
2023 - 9 p.
- Published in : JACoW eeFACT 2022 (2023) 52-60
Fulltext: PDF;
In : 65th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+ e- Colliders (eeFACT2022), INFN, Frascati, Italy, 12 - 16 Sep 2022, pp.52-60
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