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1.
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The status of the FCC-ee optics tuning
/ van Riesen-Haupt, Léon (Ecole Polytechnique, Lausanne) ; Franchi, Andrea (ESRF, Grenoble) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Chance, Antoine (Paris, CEA) ; Dalena, Barbara (Paris, CEA) ; Järmyr Eriksson, Carl (CERN) ; Carli, Christian (CERN) ; Garcia Jaimes, Cristobal Miguel (Ecole Polytechnique, Lausanne) ; Shatilov, Dmitry (CERN) ; Musa, Elaf (DESY) et al.
With a circumference of approximately 91 km, the Future Circular electron-positron Collider, FCC-ee, aims for unprecedented luminosities at beam energies from 45.6 to 182.5 GeV. A major challenge is reaching its design performance in the presence of magnet misalignments and field errors. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR02
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR02
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2.
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Progress of the FCC-ee optics tuning working group
/ Bauche, J (CERN) ; da Silva, T (IRFU, Saclay) ; Shatilov, D (CERN) ; Chance, A (IRFU, Saclay) ; Wu, Y (Ecole Polytechnique, Lausanne) ; Wang, Y (Beijing, Inst. High Energy Phys.) ; Tomas, Rogelio (CERN) ; Franchi, Andrea (ESRF, Grenoble) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Dalena, Barbara (IRFU, Saclay) et al.
FCC-ee is a proposed lepton collider with a circumference close to 100 km to produce an unprecedented amount of luminosity. The FCC-ee optics tuning working group is addressing one of the most critical aspects of the FCC-ee, that is the recovery of the optics design performance in presence of realistic imperfections. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPL023
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPL023
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3.
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Non-Linear Variation of the Beta-Beating Measured From Amplitude
/ Pugnat, Thomas (IRFU, Saclay) ; Dalena, Barbara (IRFU, Saclay) ; Franchi, Andrea (ESRF, Grenoble) ; Tomás García, Rogelio (CERN)
Accelerator physics needs advanced modeling and simulation techniques, for beam stability studies but also for the measurement of beam parameters like the Twiss parameters. A deeper understanding of magnetic field non-linearities effects will greatly help in the improvement of future circular collider design, performance, and diagnostics. [...]
Geneva : JACoW, 2021 - 3 p.
- Published in : JACoW IPAC 2021 (2021) 1949-1951
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1949-1951
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4.
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Split or unsplit electron beams?
/ Franchi, Andrea (ESRF, Grenoble) ; Giovannozzi, Massimo (CERN)
Non-linear effects have become increasingly relevant in modern circular particle accelerators, and in recent years a change of paradigm has appeared, the attitude towards nonlinear effects having shifted from fighting them to exploiting them with the goal of devising new beam manipulations, such as the splitting of the beam in the transverse phase space by crossing a stable resonance. [...]
arXiv:2202.04864.
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20 p.
Fulltext
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5.
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6.
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Could synchrotron light sources benefit from the experience at CERN with beams split in horizontal phase space?
/ Giovannozzi, Massimo (CERN) ; Carmignani, Nicola (ESRF, Grenoble) ; Franchi, Andrea (ESRF, Grenoble)
This article reviews the recent activities carried out at CERN in terms of transverse beam splitting with proton beams. Thanks to intense experimental and theoretical activities, the recently-proposed approach of splitting beams in the horizontal phase space using stable islands moved out of the test stage and it became a mature technique of beam manipulation to perform multi-turn extraction. [...]
WSP, 2019 - 17 p.
- Published in : 10.1142/9789813279612_0025
In : Nonlinear Dynamics and Collective Effects in Particle Beam Physics, Arcidosso, Italy, 19 - 22 Sep 2017, pp.298-314
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7.
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8.
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9.
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Improving the precision of linear optics measurements based on turn-by-turn beam position monitor data after a pulsed excitation in lepton storage rings
/ Malina, L (Oslo U. ; CERN) ; Coello de Portugal, J (CERN) ; Persson, T (CERN) ; Skowroński, P K (CERN) ; Tomás, R (CERN) ; Franchi, A (ESRF, Grenoble) ; Liuzzo, S (ESRF, Grenoble)
Beam optics control is of critical importance for machine performance and protection. Nowadays, turn-by-turn (TbT) beam position monitor (BPM) data are increasingly exploited as they allow for fast and simultaneous measurement of various optics quantities. [...]
2017 - 8 p.
- Published in : Phys. Rev. Accel. Beams 20 (2017) 082802
Fulltext: PDF;
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