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Futur collisionneur circulaire—Rapport d’étude de faisabilité, volume 3 : Génie civil, implantation et durabilité
/ Benedikt, M. (CERN) ; Zimmermann, F. (CERN) ; Auchmann, B. (CERN ; PSI, Villigen) ; Bartmann, W. (CERN) ; Burnet, J.P. (CERN) ; Carli, C. (CERN) ; Chancé, A. (IRFU, Saclay) ; Craievich, P. (PSI, Villigen) ; Giovannozzi, M. (CERN) ; Grojean, C. (DESY ; Humboldt U., Berlin) et al.
CERN-FCC-ACC-2025-0003-FR.-
Geneva : CERN, 2025-03 - 357 p.
- Published in : 10.17181/CERN.WE26.NJC0
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Future Circular Collider Feasibility Study Report Volume 2 : Accelerators, technical infrastructure and safety
/ Benedikt, M. (ed.) (CERN) ; Zimmermann, F. (CERN) ; Auchmann, B. (CERN ; PSI, Villigen) ; Bartmann, W. (CERN) ; Burnet, J.P. (CERN) ; Carli, C. (CERN) ; Chancé, A. (IRFU, Saclay) ; Craievich, P. (PSI, Villigen) ; Giovannozzi, M. (CERN) ; Grojean, C. (DESY ; Humboldt U., Berlin) et al.
In response to the 2020 Update of the European Strategy for Particle Physics, the Future Circular Collider (FCC) Feasibility Study was launched as an international collaboration hosted by CERN. The FCC ‘integrated programme’, described in this report, in a first stage consists of a highest-luminosity electron-positron collider, FCC-ee, serving as Higgs, top and electroweak factory, with a subsequent energy-frontier proton-proton collider, FCC-hh, as the second stage. The FCC-ee is designed to operate at four baseline centre-of-mass energies, corresponding to the Z pole, the WW pair production threshold, the ZH production peak, and the top/anti-top production threshold, always delivering the highest possible luminosities to four experiments. [...]
arXiv:2505.00274; CERN-FCC-ACC-2025-0004.-
Geneva : CERN, 2025 - 627 p.
Fulltext: CERN-FCC-ACC-2025-0004 - PDF; 2505.00274 - PDF;
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Future Circular Collider Feasibility Study Report Volume 3 : Civil Engineering, Implementation and Sustainability
/ Benedikt, M. (CERN) ; Zimmermann, F. (CERN) ; Auchmann, B. (CERN ; PSI, Villigen) ; Bartmann, W. (CERN) ; Burnet, J.P. (CERN) ; Carli, C. (CERN) ; Chancé, A. (IRFU, Saclay) ; Craievich, P. (PSI, Villigen) ; Giovannozzi, M. (CERN) ; Grojean, C. (DESY ; Humboldt U., Berlin) et al.
Volume 3 of the FCC Feasibility Report presents studies related to civil engineering, the development of a project implementation scenario, and environmental and sustainability aspects. The report details the iterative improvements made to the civil engineering concepts since 2018, taking into account subsurface conditions, accelerator and experiment requirements, and territorial considerations. [...]
arXiv:2505.00273; CERN-FCC-ACC-2025-0003.-
Geneva : CERN, 2025-03 - 357 p.
- Published in : 10.17181/CERN.I26X.V4VF
Fulltext: CERN-FCC-ACC-2025-0003 - PDF; 2505.00273 - PDF;
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Future Circular Collider Feasibility Study Report Volume 1 : Physics and Experiments
/ Benedikt, M. (CERN) ; Zimmermann, F. (CERN) ; Auchmann, B. (CERN ; PSI, Villigen) ; Bartmann, W. (CERN) ; Burnet, J.P. (CERN) ; Carli, C. (CERN) ; Chancé, A. (IRFU, Saclay) ; Craievich, P. (PSI, Villigen) ; Giovannozzi, M. (CERN) ; Grojean, C. (DESY ; Humboldt U., Berlin) et al.
Volume 1 of the FCC Feasibility Report presents an overview of the physics case, experimental programme, and detector concepts for the Future Circular Collider (FCC). This volume outlines how the FCC would address some of the most profound open questions in particle physics, from precision studies of the Higgs and EW bosons and of the top quark, to the exploration of physics beyond the Standard Model. [...]
arXiv:2505.00272; CERN-FCC-PHYS-2025-0002.-
Geneva : CERN, 2025 - 290 p.
- Published in : 10.17181/CERN.9DKX.TDH9
Fulltext: CERN-FCC-PHYS-2025-0002 - PDF; 2505.00272 - PDF;
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Theory of bunched beam transverse Schottky signals with stationary rf system and high-order chromaticity
/ Lasocha, Kacper (CERN) ; Lannoy, Christophe (CERN ; LPHE, Lausanne) ; Mounet, Nicolas (CERN) ; Alves, Diogo (CERN)
The observation of transverse Schottky spectra provides insight into intrabunch particle dynamics and serves in numerous facilities to derive important beam and machine parameters, such as the betatron tune, first-order chromaticity, and transverse emittance. The original theory confirming the validity of these observations has been, however, developed by taking strong assumptions on the particle motion in both the longitudinal and transverse planes. [...]
2024 - 13 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 112801
Fulltext: PDF;
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Impact of second-order chromaticity on the Schottky spectra of bunched beam
/ Lasocha, Kacper (CERN) ; Alves, Diogo (CERN) ; Lannoy, Christophe (CERN ; Ecole Polytechnique, Lausanne) ; Mounet, Nicolas (CERN)
Observation of Schottky signals provides information on important beam and machine parameters, such as transverse emittance, betatron tune, and first-order chromaticity. However, the so-far developed theory of Schottky spectra does not include the impact of the higher-order chromaticity, known to be non-negligible in the case of the Large Hadron Collider (LHC). [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG30
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG30
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Impact of octupoles on the Schottky spectra of bunched beams
/ Lannoy, Christophe (CERN ; Ecole Polytechnique, Lausanne) ; Alves, Diogo (CERN) ; Lasocha, Kacper (CERN) ; Mounet, Nicolas (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne)
Schottky monitors serve as non-invasive tools for beam diagnostics, providing insights into crucial bunch characteristics such as tune, chromaticity, bunch profile, or synchrotron frequency distribution. However, octupole magnets commonly used in circular storage rings to mitigate instabilities through the Landau damping mechanism, can significantly affect the Schottky spectrum. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG32
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG32
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Experimental and simulated LHC Schottky spectra
/ Lannoy, Christophe (CERN ; Ecole Polytechnique, Lausanne) ; Alves, Diogo (CERN) ; Lasocha, Kacper (CERN) ; Mounet, Nicolas (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne)
Schottky monitors are valuable non-invasive tools used for beam diagnostics, providing insights into crucial bunch characteristics such as tune, chromaticity, bunch profile, or synchrotron frequency distribution. This study investigates Schottky spectra at the Large Hadron Collider (LHC) through a combination of simulations and measurements. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG31
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG31
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10.
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Selective electron beam sensing through coherent Cherenkov diffraction radiation
/ Senes, E (CERN) ; Krupa, M (CERN) ; Mazzoni, S (CERN) ; Lasocha, K (CERN) ; Lefevre, T (CERN) ; Shloegelhofer, A (CERN) ; Wendt, M (CERN) ; Davut, C (Manchester U.) ; Karataev, P (JAI, UK) ; Pakuza, C (JAI, UK) et al.
We exploit the coherent emission of Cherenkov diffraction radiation (ChDR) by a relativistic electron beam to sense its position even in the presence of other particle beams. ChDR is produced in alumina inserts embedded in the vacuum chamber walls and recorded in a narrow band centered at 30 GHz. [...]
2024 - 6 p.
- Published in : Phys. Rev. Res. 6 (2024) 023278
Fulltext: PDF;
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