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Lattice correction and polarization estimation for the Future Circular Collider e+e-
/ Wu, Yi (Ecole Polytechnique, Lausanne) ; Carlier, Felix (CERN) ; van Riesen-Haupt, Léon (Ecole Polytechnique, Lausanne) ; Hofer, Michael (CERN) ; Seidel, Mike (Ecole Polytechnique, Lausanne) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Herr, Werner (Ecole Polytechnique, Lausanne)
Precise determination of the center-of-mass energy in the Future Circular Collider e+e- (FCC-ee) at Z and W energies can be achieved by employing resonant spin depolarization techniques, for which a sufficient level of transverse beam polarization is demanded under the presence of machine imperfections. In this study, the FCC-ee lattice has been modeled and simulated with a variety of realistic lattice imperfections, including misalignments, angular deviations, BPM errors, long-range errors, etc., along with refined orbit correction and tune matching procedures. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR06
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR06
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Spin-polarization simulations for the Future Circular Collider e+e- using Bmad
/ Wu, Y (Ecole Polytechnique, Lausanne) ; Carlier, F (CERN) ; Barber, D P (New Mexico U.) ; van Riesen-Haupt, L (Ecole Polytechnique, Lausanne) ; Gianfelice-Wendt, E (Fermilab) ; Pieloni, T (Ecole Polytechnique, Lausanne)
The high precision measurement of the centre-of-mass energy in the Future Circular Collider e+e- (FCC-ee) at Z and W energies can be realized through resonant spin depolarization utilizing transversely polarized beams. This requires a guaranteed sufficiently-high spin polarization in the presence of lattice imperfections. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL055
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL055
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Impact of dipole quadrupolar errors in FCC-ee
/ García-Jaimes, C (Ecole Polytechnique, Lausanne) ; Pieloni, T (Ecole Polytechnique, Lausanne) ; van Riesen-Haupt, L (Ecole Polytechnique, Lausanne) ; Seidel, M (Ecole Polytechnique, Lausanne) ; Tomás, R (CERN)
FCC-ee performance is challenged by magnetic errors and imperfections. Magnetic design simulations predict a systematic quadrupolar component in the arc dipoles significantly impacting the machine optics. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL065
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL065
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4.
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Parameter space for the magnetic design of Nested Magnets in the FCC-ee arc cell
/ Garcia Jaimes, Cristobal Miguel (Ecole Polytechnique, Lausanne, LPAP) ; Thabuis, Adrien (CERN) ; Auchmann, Bernhard (PSI, SLS) ; Kosse, Jaap (PSI, SLS) ; van Riesen-Haupt, Léon (Ecole Polytechnique, Lausanne, LPAP) ; Koratzinos, Michael (CERN) ; Seidel, Mike (Ecole Polytechnique, Lausanne, LPAP) ; Tomas, Rogelio (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne, LPAP)
The Future Circular Collider (FCC-ee) is designed to explore the Z and W± bosons, along with the Higgs boson and top quark, achieving exceptionally high luminosity. In order to minimize the energy lost per turn due to Synchrotron Radiation (SR) we explore the use of Nested Magnets (NMs) into the arcs cell. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR11
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR11
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Simulated performance of FCC-ee IP tuning knobs
/ Jagabathuni, Satya Sai (CERN ; U. Geneva (main)) ; Zimmermann, Frank (CERN) ; van Riesen-Haupt, Léon (Ecole Polytechnique, Lausanne) ; Hofer, Michael (CERN) ; Carlier, Felix (Ecole Polytechnique, Lausanne)
The Future Circular electron-positron Collider (FCC-ee) is a proposed accelerator with 91 kilometres circumference that should serve as a Higgs and electroweak factory, with unprecedented luminosity. Unavoidable misalignments and field errors will generate optics errors at the interaction point (IP), whose effect will be amplified by the beam-beam collisions, which will make it challenging for the collider to reach its intended luminosity goals. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR03
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR03
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First FCC-ee lattice designs with Nested Magnets
/ Garcia Jaimes, Cristobal Miguel (Ecole Polytechnique, Lausanne, LPAP) ; van Riesen-Haupt, Léon (Ecole Polytechnique, Lausanne, LPAP) ; Seidel, Mike (Ecole Polytechnique, Lausanne, LPAP) ; Tomas, Rogelio (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne, LPAP)
The Future Circular Electron-Positron Collider (FCC-ee) represents a cutting-edge particle physics facility designed to further investigate the Z, W± and Higgs boson in addition to the top quark. The implementation of Nested Magnets (NMs) in the FCC-ee arc cells would maintain high luminosity and reduce its energy consumption. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR10
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR10
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Review of MAD-X for FCC-ee studies
/ Simon, Guillaume (CERN ; IJCLab, Orsay) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; van Riesen-Haupt, Léon (Ecole Polytechnique, Lausanne) ; De Maria, Riccardo (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne)
The design of the electron-positron Future Circular Collider (FCC-ee) challenges the requirements on optics codes (like MAD-X) in terms of accuracy, consistency, and performance. Traditionally, MAD-X uses a transport formalism by expanding the transfer map about the origin up to second order to compute optics functions and synchrotron radiation integrals in the TWISS and EMIT modules. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR22
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR22
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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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Spin Polarization Simulations for the Future Circular Collider $e^+e^-$ using BMAD
/ Wu, Yi (EPFL-ISIC, Lausanne) ; Carlier, Felix (CERN) ; Pieloni, Tatiana (EPFL-ISIC, Lausanne) ; van Riesen-Haupt, Léon (EPFL-ISIC, Lausanne)
Measurements of particle properties with unprecedented accuracy in the Future Circular Collider e⁺e⁻ (FCC-ee) are reliant on the high precision center-of-mass energy calibration, which could be realized via resonant depolarization measurements. The obtainable equilibrium spin polarization levels under the influence of lattice imperfections should be estimated via spin polarization simulations. [...]
2023 - 5 p.
- Published in : JACoW eeFACT 2022 (2023) 103-107
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.103-107
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First comparison studies in dynamic aperture for nested magnets and baseline lattice in the FCC-ee
/ García-Jaimes, C (Ecole Polytechnique, Lausanne, LPAP) ; Pieloni, T (Ecole Polytechnique, Lausanne, LPAP) ; van Riesen-Haupt, L (Ecole Polytechnique, Lausanne, LPAP) ; Seidel, M (Ecole Polytechnique, Lausanne, LPAP) ; Tomás, R (CERN)
A significant project such as the FCC-ee (with 91.17 km circumference) entails numerous challenges to ensure the stability and performance of the machine. In the pursuit of contributing to the improvement of energy consumption during its operation, the exploration of Nested Magnets (NMs) as a means to reduce synchrotron radiation has been undertaken. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR12
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR12
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