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1.
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Status of the FCC-ee interaction region design
/ Boscolo, Manuela (Frascati) ; Palla, Fabrizio (INFN, Pisa) ; Ammirabile, Gherardo (INFN, Pisa) ; Andre, Kevin D J (CERN) ; Baldinelli, Giorgio (INFN, Perugia ; Perugia U.) ; de Sousa, Patricia Borges (CERN) ; Bosi, Filippo (INFN, Pisa) ; Broggi, Giacomo (Frascati ; CERN ; U. Rome La Sapienza (main)) ; Bruce, Roderik (CERN) ; Burkhardt, Helmut (CERN ; Freiburg U.) et al.
This paper presents a comprehensive overview of the Machine Detector Interface (MDI) design developed for the FCC-ee Feasibility Study. It highlights novel studies related to the lightweight interaction region, including a mechanical model of the vacuum chambers, integration of the vertex detector, the MDI alignment system, and assessments of machine-induced backgrounds. [...]
2025 - 67 p.
- Published in : EPJ Tech. Instrum. 12 (2025) 4
Fulltext: PDF;
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2.
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Conical Targets for Enhanced High-Current Positron Sources
/ Vallis, Nicolas (Minnesota U., Math. ; Northeastern U. ; PSI, Villigen ; CERN ; LPHE, Lausanne) ; Mena-Andrade, Ramiro (CERN) ; Humann, Barbara (CERN) ; Zhao, Yongke (CERN) ; Craievich, Paolo (Minnesota U., Math. ; Northeastern U. ; PSI, Villigen) ; Grenard, Jean-Louis (CERN) ; Latina, Andrea (CERN) ; Lechner, Anton (CERN) ; Perillo-Marcone, Antonio (CERN) ; Zennaro, Riccardo (Minnesota U., Math. ; Northeastern U. ; PSI, Villigen) et al.
Previous pair-production-driven positron source designs have assumed that the transverse dimension of the target is significantly greater than the secondary beam it generates. This paper explores the use of targets with different transverse profiles with the aim of enhancing positron production. [...]
arXiv:2502.10565.-
2025-09-11 - 15 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 568 (2025) 165854
Fulltext: 2502.10565 - PDF; document - PDF;
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3.
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Channeling performance of bent crystals developed at CERN
/ Rodin, Volodymyr (CERN) ; Esposito, Luigi Salvatore (CERN) ; Lechner, Anton (CERN) ; Demassieux, Quentin (CERN) ; Matheson, Eloise (CERN) ; Solis Paiva, Santiago (CERN) ; Seidenbinder, Regis (CERN) ; Aberle, Oliver (CERN) ; Perillo Marcone, Antonio (CERN) ; Calviani, Marco (CERN) et al.
Bent crystals are a mature technology used in several applications at CERN, such as the crystal-assisted collimation system for LHC ion operation and reduction of losses during the slow extraction from the SPS by shadowing the electrostatic septum. In the future, it is planned to measure electric and magnetic dipole moments of short-lived particles with a double-crystal experiment in the LHC. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPS39
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPS39
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4.
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The PSI positron production project
/ Vallis, Nicolas (PSI, Villigen ; Ecole Polytechnique, Lausanne) ; Craievich, Paolo (PSI, Villigen) ; Schaer, Mattia (PSI, Villigen) ; Zennaro, Riccardo (PSI, Villigen) ; Auchmann, Bernhard (PSI, Villigen) ; Besana, Maria Ilaria (PSI, Villigen) ; Duda, Michal (PSI, Villigen) ; Fortunati, Reto (PSI, Villigen) ; Garcia Rodrigues, Henrique (PSI, Villigen) ; Hauenstein, Dominique (PSI, Villigen) et al.
The PSI Positron Production experiment, known as $\text{P}^{3}$ or $\textit{P-cubed}$, is a proof-of-principle positron source and capture system that can greatly improve the state-of-the-art positron yield. The $\text{P}^{3}$ project is led by the Paul Scherrer Institute in Switzerland, and addresses the long-standing challenge faced by conventional injector facilities to generate, capture, and damp the emittance of high-current positron beam, which is a major limiting factor for the feasibility of future electron-positron colliders. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC50
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC50
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5.
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HL-LHC series collimators: key technical requirements, crucial production challenges and risk mitigation plan
/ Piccinni, Carla (CERN) ; Perillo Marcone, Antonio (CERN) ; Senajova, Dominika (CERN) ; Baillard, Dylan (CERN) ; Grenier-Boley, Edouard (CERN) ; Nuiry, Francois-Xavier (CERN) ; Calviani, Marco (CERN) ; Seidenbinder, Regis (CERN) ; Redaelli, Stefano (CERN)
In view of High Luminosity (HL) - Large Hadron Collider (LHC) project, an upgraded collimation system has been developed to accommodate a rise of ten times of the integrated luminosity compared to the LHC. A new series of collimators will be produced and installed in the machine during the Long Shutdown 3 (LS3) to take place during 2026-2028. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC75
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC75
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6.
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Energy deposition and radiation level studies for the FCC-ee experimental insertions
/ Frasca, Alessandro (CERN ; Liverpool U.) ; Ciarma, Andrea (Frascati) ; Lechner, Anton (CERN) ; Perillo Marcone, Antonio (CERN) ; Humann, Barbara (CERN) ; Järmyr Eriksson, Carl (CERN) ; Welsch, Carsten (Liverpool U.) ; Calzolari, Daniele (CERN) ; Lerner, Giuseppe (CERN) ; Boscolo, Manuela (Frascati) et al.
The Future Circular Collider (FCC) study foresees the construction of a 90.7 km underground ring where, as a first stage, a high-luminosity electron-positron collider (FCC-ee) is envisaged, operating at beam energies from 45.6 GeV (Z pole) to 182.5 GeV (ttbar). In the FCC-ee experimental interaction regions, various physical processes give rise to particle showers that can be detrimental to machine components as well as equipment in the tunnel, such as cables and electronics. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC66
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC66
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7.
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Collimation of 400 MJ Beams at the LHC: The First Step Towards the HL-LHC Era
/ Redaelli, Stefano (CERN) ; Abramov, Andrey (CERN) ; Baillard, Dylan (CERN) ; Bruce, Roderik (CERN) ; Cai, Rongrong (CERN ; Ecole Polytechnique, Lausanne) ; Carra, Federico (CERN) ; D'Andrea, Marco (CERN) ; Di Castro, Mario (CERN) ; Giacomel, Lorenzo (CERN) ; Hermes, Pascal (CERN) et al.
An important upgrade programme is planned for the collimation system of the CERN Large Hadron Collider (LHC) in order to meet the challenges of the upcoming High-Luminosity LHC (HL-LHC) project. A first stage of the HL-LHC upgrade was already deployed during the last LHC Long Shutdown, offering important improvements of the collimation cleaning, a significant reduction of the impedance contribution and better cleaning of collisional debris, in particular for ion-ion collisions. [...]
2024 - 4 p.
- Published in : JACoW HB 2023 (2024) 603-606
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.603-606
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8.
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Update on the FCC-ee positron source design studies
/ Chaikovska, Iryna (IJCLab, Orsay) ; Bacci, Alberto (INFN, Milan) ; Latina, Andrea (CERN) ; Lechner, Anton (CERN) ; Perillo Marcone, Antonio (CERN) ; Humann, Barbara (CERN) ; Auchmann, Bernhard (PSI, Villigen) ; Alharthi, Fahad (IJCLab, Orsay ; KACST, Riyadh) ; Kosse, Jaap (PSI, Villigen) ; Grenard, Jean-Louis (CERN) et al.
The studies and R&D; on the high-intensity positron source for the FCC-ee have been initiated for a while. The positrons are produced by a 6 GeV electron drive-beam incident on a target-converter at 200 Hz. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL095
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL095
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9.
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The FCCee Pre-Injector Complex
/ Craievich, Paolo (PSI, Villigen) ; Alharthi, Fahad (IJCLab, Orsay) ; Auchmann, Bernhard (PSI, Villigen) ; Bartmann, Wolfgang (CERN) ; Benedikt, Michael (CERN) ; Besana, Maria Ilaria (CERN) ; Bettoni, Simona (PSI, Villigen) ; Braun, Hans-Heinrich (PSI, Villigen) ; Calviani, Marco (CERN) ; Chaikovska, Iryna (IJCLab, Orsay) et al.
The international FCC study group published in 2019 a Conceptual Design Report for an electron-positron collider with a centre-of-mass energy from 90 to 365 GeV with a beam currents of up to 1.4 A per beam. The high beam current of this collider create challenging requirements on the injection chain and all aspects of the linac need to be carefully reconsidered and revisited, including the injection time structure. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2007-2010
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2007-2010
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10.
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Conceptual Design of the FCC-ee Beam Dumping System
/ Krainer, Alexander (CERN) ; Andreu Muñoz, Pablo (CERN) ; Bartmann, Wolfgang (CERN) ; Calviani, Marco (CERN) ; Dutheil, Yann (CERN) ; Lechner, Anton (CERN) ; Nuiry, Francois-Xavier (CERN) ; Perillo-Marcone, Antonio (CERN) ; Ramjiawan, Rebecca (JAI, UK ; CERN)
The Future Circular electron-positron Collider (FCC-ee) will feature stored beam energies of up to 18 MJ. This is a factor 100 higher than any current or past lepton collider. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1753-1756
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1753-1756
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