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Sari Lindblom (University of Helsinki)08/06/2026, 08:30(2) Oral presentation
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Katri Huitu (University of Helsinki)08/06/2026, 08:40(2) Oral presentation
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Dr Flyura Djurabekova (Helsinki Institute of Physics (FI))08/06/2026, 08:50(2) Oral presentation
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Paula Eerola (Research Council of Finland)08/06/2026, 09:00(2) Oral presentation
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Mark Thomson (CERN)08/06/2026, 09:10(2) Oral presentation
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Costas Fountas (University of Ioannina (GR))08/06/2026, 09:30(2) Oral presentation
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Valdis Dombrovskis (European Commission)08/06/2026, 09:50
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Paris Sphicas (CERN/Athens)08/06/2026, 10:35(2) Oral presentation
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Pier Francesco Monni (CERN)08/06/2026, 11:05(2) Oral presentation
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Michael Benedikt (CERN)08/06/2026, 12:05(2) Oral presentation
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Jean-Paul Burnet (CERN)08/06/2026, 14:00(2) Oral presentation
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Dr Simone Gilardoni (CERN)08/06/2026, 14:25(2) Oral presentation
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Antoine Mayoux (CERN)08/06/2026, 14:50(2) Oral presentation
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Verena Kain (CERN)08/06/2026, 15:15(2) Oral presentation
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Rebeca Gonzalez Suarez (Uppsala University (SE))08/06/2026, 16:00(2) Oral presentation
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Josh Bendavid (CERN)08/06/2026, 16:25(2) Oral presentation
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George Iakovidis (Brookhaven National Laboratory (US)), Valentina Cairo (CERN)08/06/2026, 16:50(2) Oral presentation
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Dolores Garcia (CERN)08/06/2026, 17:15(2) Oral presentation
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Matteo Defranchis (CERN)09/06/2026, 08:30(2) Oral presentation
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Charline Marcel (CERN)09/06/2026, 08:30(2) Oral presentation
This presentation provides an updated overview of the FCC electrical grid and infrastructure following the Feasibility Study Report. The grid concept has been further developed to improve reliability according to updated requirements. The infrastructure of the various underground areas has been refined or preliminarily defined to support the integration studies of these facilities. In...
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Dr Pantaleo Raimondi (Fermi National Accelerator Lab. (US))09/06/2026, 08:30(2) Oral presentation
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Dirk Mergelkuhl (CERN)09/06/2026, 08:30(2) Oral presentation
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Frank Gerigk (CERN)09/06/2026, 08:30(2) Oral presentation
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Adnan Ghribi (Centre National de la Recherche Scientifique (FR))09/06/2026, 08:30(2) Oral presentation
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Johannes Gutleber (CERN)09/06/2026, 08:35(2) Oral presentation
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Nuria Catalan Lasheras (CERN)09/06/2026, 08:48(2) Oral presentation
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Xavier Buffat (CERN)09/06/2026, 08:50(2) Oral presentation
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Giovanni Stagnitto (INFN e Universita Genova (IT))09/06/2026, 08:50
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Mario Parodi (CERN), Marta Gomis09/06/2026, 08:52(2) Oral presentation
This presentation provides an overview of the preliminary results of the RF2.0 project related to the ongoing electrical grid analysis activities on LHC. Particular attention is given to the investigation of electrical perturbations and network events that can lead to accelerator downtime and impact overall machine availability. The analysis aims to improve the understanding of the interaction...
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Vincent Gerligand (CERN / Conservatoire National des Arts et Metiers Cnam (FR))09/06/2026, 08:55(2) Oral presentation
The installation of the components in the FCC-ee arcs require a geometrical network throughout the entire tunnel to enable the initial positioning and the precise alignment of the components. This First Geodetic Network must be determined with an uncertainty of a few millimeters.
This work presents the first simulation studies of the First Geodetic Network implemented over the full FCC...
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Guy Wilkinson (University of Oxford (GB))09/06/2026, 09:05(2) Oral presentation
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Dr Thomas Proslier09/06/2026, 09:06(2) Oral presentation
The Future Circular Collider (FCC) project requires reliable major advances in superconducting radiofrequency (SRF) technologies to achieve its ambitious performance, efficiency, and sustainability objectives. Leveraging decades of experience in accelerator science and SRF systems, CEA contributes to several key technological areas, including SRF cavities, cryomodules, fundamental power...
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Marc Andre Jebramcik (CERN)09/06/2026, 09:10(2) Oral presentation
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Dr Davide Aguglia (CERN)09/06/2026, 09:14(2) Oral presentation
Power quality events can have a direct impact on the availability of the Future Circular Collider by causing undesired trips of sensitive equipment. At the same time, maintaining a high level of power quality is essential to ensure stable and reliable operation of the machine and its technical infrastructure.
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This presentation discusses how machine availability could be improved through the... -
Bingru Yang (CERN)09/06/2026, 09:20
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Franck Peauger (CERN)09/06/2026, 09:24(2) Oral presentation
A coordinated European effort is being established to develop and validate 800 MHz SRF technology for FCC-ee. CERN, IJCLab, CEA, ESS, DESY and HZB are collaborating to deliver a high-gradient, high-Q0 cryomodule demonstrator by 2031 as a first step towards industrialization. The new E2-SCALE European project will support significantly this initiative which is based on previous European...
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Rebeca Gonzalez Suarez (Uppsala University (SE))09/06/2026, 09:25(2) Oral presentation
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Daniel Ricci (CERN)09/06/2026, 09:25(2) Oral presentation
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Dr Katsunobu Oide (KEK High Energy Accelerator Research Organization (JP))09/06/2026, 09:30(2) Oral presentation
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Corentin Pierre Boennec (Laplace)09/06/2026, 09:36(2) Oral presentation
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Martin Dusek09/06/2026, 09:40(2) Oral presentation
Next-generation colliders, such as the Future Circular Collider (FCC), require precision in the order of micrometers over distances of hundreds of meters. While traditional straight-line alignment technologies like Wire Position and Hydrostatic Leveling Systems are highly accurate, they have several drawbacks, such as deployment complexity. Optical alignment techniques offer a promising...
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Janusz Gluza (University of Silesia (PL))09/06/2026, 09:40(2) Oral presentation
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Prof. Zusheng Zhou09/06/2026, 09:42
The CEPC collider requires approximately 60 MW of beam power, making the efficiency of RF power sources a key determinant of overall project cost-effectiveness. High-power, high-efficiency klystrons are therefore particularly attractive due to their superior performance compared with alternative RF amplifiers.
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At IHEP, a 650 MHz continuous-wave (CW) high-efficiency klystron prototype,... -
Kevin Andre09/06/2026, 09:45(2) Oral presentation
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09/06/2026, 09:45
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Hannes Gamper (CERN)09/06/2026, 10:30(2) Oral presentation
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Dominik Dannheim (CERN)09/06/2026, 10:30(2) Oral presentation
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Vittorio Parma (CERN)09/06/2026, 10:30(2) Oral presentation
As part of an Accelerator R&D programme at CERN, we aim at building full-scale SRF cryomodule demonstrators at 400 MHz and 800 MHz.
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While the 400 MHz cryomodule (Demo400) will be designed and constructed at CERN, the development of the 800 MHz cavities and cryomodule relies on a collaborative effort with partner institutes. A Horizontal Test Cryostat (HTC) is also under development to... -
Marton Ady (CERN)09/06/2026, 10:30(2) Oral presentation
The FCC-ee machine-detector interface (MDI) region, where the two beams meet, receives synchrotron radiation (SR) from upstream dipoles and quadrupoles. When these SR photons hit the vacuum chamber wall, they can create photoelectrons and desorb molecules from the surface, increasing the background gas pressure and contribute to electron cloud formation during operation.
To estimate the...
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Jacqueline Keintzel (CERN)09/06/2026, 10:30(2) Oral presentation
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Karin Canderan (CERN)09/06/2026, 10:48(2) Oral presentation
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Patrick Krkotic09/06/2026, 10:50(2) Oral presentation
The vacuum system of the FCC-ee must satisfy stringent beam-impedance requirements arising from high beam currents, short bunch lengths, and tight constraints imposed by collective effects. In particular, controlling beam-coupling impedance is essential to limit parasitic beam-induced power losses, mitigate higher-order mode excitation, and protect vacuum components from excessive thermal...
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Chris Rasmussen (Brookhaven National Laboratory (US))09/06/2026, 10:50(2) Oral presentation
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Sabrina Maria Appel (GSI)09/06/2026, 10:50(2) Oral presentation
The complexity of the accelerator facility demands a high level of automation to maximize the time for physics experiments and reduce energy waste. CERN and GSI collaborate on AI model development using the commonly developed GeOFF software as part of the EURO-LABS project for real-time optimization of beam parameters and experimental setups. In the iRIS project, integration of GeOFF with the...
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Francesco Baroni (Universita degli Studi di Trento and INFN (IT))09/06/2026, 10:52(2) Oral presentation
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Laura Helene Hannemann (CERN)09/06/2026, 11:06(2) Oral presentation
The FCC-ee collider requires large-scale production of 400 MHz SRF cavities with demanding geometrical and surface-quality specifications. This presentation summarizes ongoing cavity manufacturing developments at CERN, comparing bulk machining and hydroforming as candidate production routes. Recent progress in cavity fabrication is presented, including an assessment of the advantages and...
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Dr Ralph Steinhagen (GSI)09/06/2026, 11:10(2) Oral presentation
Any modern accelerator or large infrastructure complex contains tens of thousands of individually-powered devices — magnet power converters, RF amplifiers, cryogenic plant, water cooling, beam diagnostics, IT infrastructure, or other conventional facility loads — each with its own electrical signature and drift toward end-of-life.
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Instrumenting every device is neither economical nor... -
Valentina Giovinco (CERN)09/06/2026, 11:10(2) Oral presentation
The mechanical design of the FCC-ee vacuum system must withstand thermal and mechanical loads during bake-out and operation while accounting for the integration with interfacing components.
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To this end, an extensive thermo-mechanical analysis was carried out on the collider arc half-cell by means of an experimentally validated FE model. Heat dissipation and thermal deformations of the vacuum... -
Mariarosaria D'Alfonso (Massachusetts Inst. of Technology (US))09/06/2026, 11:10(2) Oral presentation
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Benjamin Weyer (CERN)09/06/2026, 11:14(2) Oral presentation
Building the FCC tunnel, installing and aligning each component of the machine and the experiments at the designed location will be a challenging task relying notably on the accuracy and reliability of the geodetic infrastructure.
Over the past year, in collaboration with ETHZ, HEIG-VD, IGN and Swisstopo, progress has been made developing the new geodetic infrastructure for the FCC. Efforts...
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Daniel Sittard (CERN and Karlsruhe Institute of Technology (KIT))09/06/2026, 11:24(2) Oral presentation
RF kickers are under study to be used for transverse feedback and as a depolarizer for beam energy measurements by resonant depolarization.
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Resonant kickers are proposed as an alternative to the current baseline stripline design. Due to their resonant design, they can achieve a higher shunt impedance than a stripline kicker with the same transverse dimensions while providing sufficient... -
Stefania Grozavu09/06/2026, 11:30(2) Oral presentation
In the FCC-ee study, electron and positron beams are foreseen to circulate at high current and energy in a 91 km circumference twin-ring collider. The current operational scenario includes an initial running stage at a beam energy of 45.6 GeV and a current of approximately 1.4 A, generating large amounts of synchrotron radiation power and flux. To guarantee rapid reduction of the photon...
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Thorsten Wengler (CERN)09/06/2026, 11:30(2) Oral presentation
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Jef Bergmans09/06/2026, 11:30(2) Oral presentation
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Damien Lafarge (CERN)09/06/2026, 11:36(2) Oral presentation
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Jan Eysermans (Massachusetts Inst. of Technology (US))09/06/2026, 11:45(2) Oral presentation
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Jakub Szaga09/06/2026, 13:30
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Elaf Musa (DESY)09/06/2026, 13:30(2) Oral presentation
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Yann Lechevin (CERN)09/06/2026, 13:30(2) Oral presentation
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Marzia Bernardini (CERN)09/06/2026, 13:30(2) Oral presentation
The presentation will outline the roadmap for the Project, with a focus on establishing coherent and consistent baselines, ranging from technical aspects to an integrated project framework covering planning, cost, and resource management.
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It will present the objectives of the Reference and Technical Design phases, explaining the methodology to achieve them, as well as highlighting the main... -
197. Update on the integration studies for FCC-ee underground - Experimental Points (PA, PD, PG, PJ)Mr Dan Harvey (CERN)09/06/2026, 13:30(2) Oral presentation
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Prof. Marnik Denis Vanclooster09/06/2026, 13:30(2) Oral presentation
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Tirsi Prebibaj (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 13:45(2) Oral presentation
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Brett Parker (Brookhaven National Laboratory (US))09/06/2026, 13:48(2) Oral presentation
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Fani Valchkova-Georgieva (Bulgarian Academy of Sciences (BG))09/06/2026, 13:48(2) Oral presentation
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Sarah Agathe Fleury09/06/2026, 13:50(2) Oral presentation
FCC is a long-term project with a complex timeline spanning more than 20 years, from the current feasibility studies through to commissioning. One of the key challenges lies in effectively planning and coordinating activities across this extended period. To address this goal, a Project Master Schedule has been developed in close collaboration with all pillar coordinators.
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The presentation... -
Wietse Van Goethem09/06/2026, 14:00(2) Oral presentation
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Johannes Gutleber (CERN)09/06/2026, 14:00(2) Oral presentation
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John Theodore Seeman (SLAC National Accelerator Laboratory)09/06/2026, 14:06(2) Oral presentation
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Barbara Humann (CERN)09/06/2026, 14:06(2) Oral presentation
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Beatriz Arias Alonso (CERN)09/06/2026, 14:10(2) Oral presentation
Quality and controls across the project. Methods being implemented from PBS to processes.
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This presentation outlines the development of key project management tools designed to support effective coordination, traceability, and quality oversight within the project. It describes the definition of project components through the implementation of a Product Breakdown Structure (PBS), providing a... -
Kyriacos Skoufaris (CERN)09/06/2026, 14:15(2) Oral presentation
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Mattis Nil Madiane Kennouche (CERN)09/06/2026, 14:15(2) Oral presentation
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Louise Olivia Jorat (CERN)09/06/2026, 14:24(2) Oral presentation
This presentation describes the process of integrating the beamstrahlung dump infrastructure in the FCC tunnel. The liquid lead dump solution considered at the moment consists of a free surface lead flow supported by a stainless steel container, a piping system linking the dump to an expansion vessel, a heat exchanger, a storage tank and electromagnetic pumps to circulate the liquid...
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Leonard Watrelot (CERN)09/06/2026, 14:24(2) Oral presentation
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Kasia Pokorska (CERN)09/06/2026, 14:30(2) Oral presentation
The FCC Reference Design Phase aims at increasing the maturity, consistency and traceability of the project cost estimates established during the Feasibility Study.
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This contribution presents the methodology implemented for the FS to define the FCC cost baseline and the associated financial risks.
The presentation will further discuss the evolution from feasibility-level estimates towards... -
Satya Sai Jagabathuni (Indian Institute of Technology Madras (IN))09/06/2026, 14:30(2) Oral presentation
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Carsten Peter Welsch (Cockcroft Institute / University of Liverpool)09/06/2026, 14:30(2) Oral presentation
Large research infrastructures are central to scientific discovery, innovation and international collaboration, but their long-term sustainability depends not only on technical solutions, but also on trust, skills, visibility and uptake.
This talk presents the communication, engagement and training work package of the iRIS project which ensures that the project’s results reach the...
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Manuela Boscolo (INFN e Laboratori Nazionali di Frascati (IT))09/06/2026, 14:42(2) Oral presentation
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Ms Audrey Piccini (CERN)09/06/2026, 14:42(2) Oral presentation
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Christian Goffing (CERN and KIT)09/06/2026, 14:45(2) Oral presentation
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09/06/2026, 15:30
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Arnaud Marsollier (CERN)09/06/2026, 15:30(2) Oral presentation
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Dr HITOMI IKEDA (KEK)09/06/2026, 15:30(2) Oral presentation
SuperKEKB is a circular collider with a 7GeV electron ring (HER) and a 4GeV positron ring (LER). Sudden beam loss (SBL) is one of the major problems faced by SuperKEKB, and various efforts have been made to solve it. Currently, we know that dust from the back seal is one of the causes. However, it seems that this is not the only cause and the problem is not completely resolved. This talk will...
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Guihlem Gabriel, Roddy Cunningham (CERN)09/06/2026, 15:30(2) Oral presentation
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Saruultugs Batzorig09/06/2026, 15:30(2) Oral presentation
The FCC project relies on a project wide systems engineering framework to keep its pillars consistent as the design matures. The Systems Engineering and Project Integration (SEI) pillar activity in the FCC Project Office (FCC-PO) is responsible for this. Managing the project baselines (parameters, layout and specifications), the global integration model, configuration and change control, and...
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Yi Wu (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 15:30(2) Oral presentation
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Armin Ilg (University of Zurich)09/06/2026, 15:50
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Christoph Montag09/06/2026, 15:50(2) Oral presentation
The Electron-Ion Collider (EIC) aims at a peak electron-proton luminosity of 10^34 cm^-2 sec^-1. We present the current design status of the facility and its synergies with FCC-ee.
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Jorg Wenninger (CERN)09/06/2026, 15:52(2) Oral presentation
To be filled...
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Jean-Paul Bergoeing (CERN), Zeynep Karatza (CERN)09/06/2026, 16:00(2) Oral presentation
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Andre Henriques (CERN)09/06/2026, 16:00(2) Oral presentation
CERN, as an intergovernmental organization dedicated to fundamental research in particle physics, defines and implements its own Safety Policy to address the specific nature of its activities and installations and to ensure its proper functioning.
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For the implementation of the Safety Policy, CERN establishes and updates Safety Rules on the whole of its site. To this end, it takes into... -
Dr Dou Wang (IHEP)09/06/2026, 16:10(2) Oral presentation
IHEP is exploring potential schemes for BEPCII to adopt the crab-waist scheme to further increase luminosity and conduct relevant experimental research. Considering that BEPCII is an existing machine, the upgrade and modification must accommodate the existing tunnel geometry and detector spatial arrangement. It is preferable to make only local adjustments or modifications to the lattice. We...
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Claire Adam Bourdarios (CERN & CNRS / IN2P3)09/06/2026, 16:10(2) Oral presentation
The FCC-PED organisational chart now includes a Work Package called ECOI, where the “I” stands for In-Reach, by analogy with the more familiar Out-Reach. The group’s structure, ambitions, and first deliverable — a fully updated website — are being presented to the FCC collaboration for the first time, with the goal of fostering feedback, new ideas, and broader participation.
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Anna Korsun (Université Paris-Saclay (FR))09/06/2026, 16:14(2) Oral presentation
Monochromatization is one of the most intriguing proposed operation modes of the FCC-ee, enabling a significant reduction of the centre-of-mass (CM) energy spread to a level comparable to the Higgs boson’s natural width produced through the s-mode direct channel at 125 GeV. Previous studies demonstrated its feasibility using earlier versions of the FCC-ee Global Hybrid Correction (GHC) optics....
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Marco Andreini (CERN)09/06/2026, 16:20(2) Oral presentation
Complex research underground infrastructures, such as those of the FCC, often host tailored-made civil structures and specialized technologies and equipment. These non-conventional structures and locations are typically employed and do not adhere to standardised building codes or established procedures for seismic risk assessment. Nevertheless, earthquakes of sufficient magnitude may cause...
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Haoyu Shi09/06/2026, 16:30(2) Oral presentation
The machine-detector interface (MDI) issues are one of the most complicate and challenging topics at the Circular Electron Positron Collider (CEPC). Comprehensive understandings of the MDI issues are decisive for achieving the optimal overall performance of the accelerator and detector. The machine will operate at different beam energies, therefore, a flexible interaction region design will be...
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Liam Bromiley (CERN)09/06/2026, 16:30(2) Oral presentation
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Simon Fanica Buijsman (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 16:36(2) Oral presentation
Insertion devices with longitudinally periodic fields—such as undulators, damping wigglers, and polarizing wigglers—play a central role in several stages of the FCC-ee injection chain. Accurate field models and efficient long-term tracking are required, as the strong longitudinal field variation cannot be captured reliably with standard multipole expansions. We introduce in the Xsuite...
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Oscar Sacristan De Frutos (CERN)09/06/2026, 16:40
The Future Circular Collider (FCC) will require unprecedented mechanical stability over a machine extending across nearly 90 km. Ground motion, technical vibrations, environmental perturbations, and seismic activity may significantly impact accelerator performance and operational reliability.
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This contribution presents lessons learned from vibration and stability studies performed at CERN in... -
Mr Adam Furman (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 17:00(1) Poster
We present an improved semi-analytical model for describing electron cloud (EC) buildup in particle accelerators. Macroparticle simulations show that EC density can be modelled as a smooth logistic-like curve with superimposed oscillations of a frequency corresponding to the beam bunch spacing. The saturation density and rate of electron cloud buildup can be linked to the best-fit parameters...
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155. Integrated HTS CCT Magnet and Beam Pipe : a Proposal for the FCC-ee Final Focus Quadrupole QCL1Matthieu Marchand (Centre National de la Recherche Scientifique (FR))09/06/2026, 17:01(1) Poster
High Temperature Superconductors (HTS) and Canted Cosine Theta (CCT) technologies have been extensively studied in recent years, particularly for high-field accelerator magnets. Their application to next-generation particle accelerators is especially promising. This article presents the combination of these two technologies for the FCC-ee Final Focus (FF) quadrupole QC1L/R1, including its...
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Eleni Marshall (STFC Daresbury)09/06/2026, 17:02(1) Poster
A new method for measuring the RF surface resistance of non-evaporable getter (NEG) coatings has been developed at Daresbury laboratory. This method measures the surface resistance of tubular samples, meaning the pumping properties of the thin film can also easily be quantified and a full spectrum of NEG properties collected.
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In the design of future accelerators, it is important to maximise... -
Luca Dassa (CERN)09/06/2026, 17:03(1) Poster
With the task of supporting the development of FCC SRF cavities, a new cryogenic facility is under development at CERN. The facility shall provide the possibility to test single cavities in full reflection mode fitted with FPC coupler, HOM couplers and operated at cryogenic temperatures for the actual baseline of the FCC accelerator: its development is focused on 400 MHz cavities, operated at...
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Angela Potet09/06/2026, 17:04(1) Poster
Failures in the electro-magnetic separator (EMS) system of the Future Circular Collider electron–positron collider (FCC-ee) can induce fast trajectory excursions with potentially critical impact on beam dynamics and machine components. This work investigates EMS failure scenarios and their consequences on beam trajectory and synchrotron radiation. Two main failure scenarios are considered:...
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Pablo Martinez Reviriego09/06/2026, 17:05(1) Poster
The high-energy linac of the Future Circular Collider electron–positron (FCC-ee) injector requires high-performance RF accelerating structures to efficiently reach 20 GeV with stable operation. A tapered travelling-wave structure operating at 3 GHz has been designed to optimize accelerating performance and suppress wakefields.
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This work focuses on the development of a full 3D model of the... -
Pablo Martinez Reviriego09/06/2026, 17:06(1) Poster
The high-energy (HE) linac for the FCC-ee injector complex must deliver 20 GeV beams with high stability for top-up injection. Following an initial design at 2.8 GHz, the RF frequency has been updated to 3 GHz to align with the European S-band standard, enhancing compatibility with existing high-power RF components and industrial manufacturing for the Technical Design Report (TDR)...
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Mr irfan ahmed09/06/2026, 17:07(1) Poster
Earlier findings from our consortium highlighted REBa₂Cu₃O₇₋ₓ (REBCO) coated conductors (CCs) as a promising alternative to copper for high-field radiofrequency (RF) applications in high-energy physics [1–2]. In this work, we demonstrate that commercial REBCO CCs provide the low surface resistance required for the Future Circular Collider (FCC) beam screen to operate at 50K or even higher...
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Clara Marie Kiel (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 17:08(1) Poster
In the Z mode operation, the FCC-ee Damping Ring must deliver a sufficiently damped train of four bunches on every linac pulse. The damping rate depends on the beam energy, on the dipole magnets and additional wiggler magnets. The ring circumference determines the number of bunch trains stored in the ring, and, thereby, their store time. The parameters for the FCC-ee DR can be optimised, based...
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Dr Matti Kalliokoski (Helsinki Institute of Physics (FI))09/06/2026, 17:09(1) Poster
Beam Loss Monitors (BLMs) are key components of machine protection systems in accelerators. In addition they provide key diagnostics for optimizing beam focusing and collimation.
At the CERN Large Hadron Collider (LHC), over 3,600 ionization chambers (ICs) monitor loss profiles around magnets [1]. However, for the proposed Future Circular Collider (FCC-ee), the sensitivity of standard ICs...
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Simone Busatto09/06/2026, 17:10
The baseline design of the FCC-ee main ring relies
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on thousands of separate resistive quadrupoles and sextupoles, ar-
ranged in different combinations along its 90.7 km arc. However,
this choice implies a substantial electrical power consumption
due to the aggregate ohmic dissipation of normal conducting
magnets. This paper presents an alternative design of a combined-
function... -
Pablo Mooney (The University of Manchester (GB))09/06/2026, 17:12(1) Poster
Bhabha radiative electrons are used to measure relative luminosity away from the IP. At SuperKEKB, this has been demonstrated using CVD diamond detectors at 4m from the IP. LGADs (Low Gain Avalanche Diode) have recently been tested as a potential alternative with the Lumibelle2 collaboration. This sensor has a much faster rise time, on the order of a nanosecond, but may be more susceptible to...
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Chenguang Zhang (Chinese Academy of Sciences (CN))09/06/2026, 17:13(1) Poster
The CEPC is proposed as a high-luminosity Higgs and electroweak factory, imposing stringent requirements on detector performance. The CEPC Reference Detector (TDR: https://arxiv.org/abs/2510.05260) has been assessed using full simulation and realistic reconstruction.
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Excellent performance is achieved for key physics objects, including high-efficiency tracking, precise vertexing, and... -
Vasilisa Guliaeva (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 17:14(1) Poster
The prospects for measuring $b$-hadronisation fractions at the FCC-ee Tera-$Z$ run are presented. Precise knowledge of the production rates of $B_c$, $B_s$, $B_u$, $B_d$, and $\Lambda_b$ hadrons is essential for heavy-flavour physics and for interpreting rare decay measurements. We develop an inclusive hadron flavour tagging approach to identify $b$-hadron species in $Z \to q\bar{q}$ events....
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Tobias Alexandre Monnard (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 17:15(1) Poster
This work presents the prospects for $B_s^0\to\tau^-\tau^+$ searches at FCC-ee. The standard model predicts that its branching fraction is $\mathcal{B}(B_s^0\to\tau^-\tau^+) = 7.73\times10^{-7}$. It is a highly sensitive probe to BSM but difficult to constrain in current experiments, the upper limit from LHCb being $6.83\times10^{-3}$. The fast simulated signal and inclusive $Z^0\to...
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Norman Seeba (National Institute of Chemical Physics and Biophysics (EE))09/06/2026, 17:16(1) Poster
The large number of Z→ττ events expected during the TeraZ program at FCC-ee will allow for precision measurements and searches for physics beyond the Standard Model, requiring accurate reconstruction of hadronically decaying tau leptons. This reconstruction is particularly challenging due to the presence of undetected neutrinos and the diverse topology of hadronic tau decays. In this work, we...
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Arina Ponomareva (Universita e INFN, Padova (IT))09/06/2026, 17:17(1) Poster
We present a common tracking validation tool developed natively within the Key4hep ecosystem for FCC-ee reconstruction studies. The tool is implemented as a Gaudi Consumer in k4DetectorPerformance and is designed to provide consistent, configurable performance evaluation across different detector concepts, reconstruction algorithms, and software configurations.
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The algorithm runs at the end... -
Ana Arranz Asensi (Univ. of Valencia and CSIC (ES))09/06/2026, 17:18(1) Poster
Highly granular calorimeters with fast response and large dynamic range are key elements of detector concepts for future colliders, where particle flow reconstruction is expected to significantly enhance physics performance. Optical sampling calorimeters are particularly attractive in this context due to their scalability, flexibility in segmentation, and robust performance.
The ALLEGRO...
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Duarte Feiteira09/06/2026, 17:19(1) Poster
In this work, I study warm Higgs portal dark matter within the freeze-in at stronger coupling framework. A low Standard Model thermal bath temperature suppresses dark matter production, allowing for a significant dark matter-Higgs coupling. This opens the possibility of probing warm dark matter through Higgs decay at colliders such as the HL-LHC and FCC, which can explore a significant region...
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Sarah Ben Abdesselem (Uppsala University (SE))09/06/2026, 17:20(1) Poster
Hidden sectors possibly connected to dark matter, “dark sectors” are interesting physics Beyond the Standard Model (BSM) cases that arise in many different BSM theories and could naturally solve some of the biggest questions in particle physics. This poster explores one of such dark sectors, the vector portal mediated by dark photons, which will be accessible at the electron-positron stage of...
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Dr Oleg Malyshev (UKRI/STFC Daresbury Laboratory)09/06/2026, 17:21(1) Poster
Superconducting thin film (TF) technology for SRF accelerating structures is applications is under intense development by the joint ASTeC–Lancaster University team at the STFC Daresbury Laboratory, aiming developing the UK’s capability in TF-SRF technology. Over last years, the team progressed from small sample production, surface science characterisation and basic superconducting properties...
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Gauri Napoletano (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 17:22
Scintillating fibre (SciFi) trackers are a well-established technology for charged particle tracking in high-energy physics. Building on the successful operation of the LHCb Collaboration SciFi Tracker, this work investigates the potential of next-generation scintillating fibres for future collider detectors in the context of the Future Circular Collider (FCC).
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This poster presents an R\&D... -
Elena De Santis (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 17:23
The scintillating fiber tracking detector technology (SciFi) has matured over the years, and its use cases have continued to expand. With recent technological advances, it is now possible to use SciFi as the main general-purpose tracker for future colliders. In this contribution, we present results on the performance of SciFi mats featuring a double-sided readout based on digital SiPMs,...
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Dr Ismet Siral (EPFL - Ecole Polytechnique Federale Lausanne (CH))09/06/2026, 17:24
The advent of Silicon Photomultipliers (SiPMs) has driven the widespread integration of Scintillating Fiber (SciFi) trackers across diverse detector designs. Building on previous efforts to model the SciFi tracker in Geant4, our team at EPFL has created a Geant4 framework capable of capturing it's full detector properties. In this contribution, we will be presenting the latest SciFi Geant4...
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Greta Gajdan (Universitaet Bern (CH))09/06/2026, 17:25
The development of advanced detector technologies will play a key role in the success of next-generation high-energy physics experiments, such as the Future Circular Collider (FCC-ee). Nanocomposite-based wavelength-shifters emerge as a promising technology for novel detector designs. These materials comprise quantum dots embedded in a polymer matrix, offering narrow, tunable emission spectra...
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Liangyu Wu (Stanford University/SLAC National Accelerator Laboratory)09/06/2026, 17:26
Dual-readout calorimeters achieve superior energy resolution by simultaneously measuring Cherenkov and scintillation signals for event-by-event electromagnetic fraction correction, making them attractive for next-generation Higgs factories. However, if a full waveform readout is required for time-based analysis to separate Cherenkov and scintillation signals, high off-detector data rates might...
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Dimitris Ntounis (SLAC National Accelerator Laboratory (US))09/06/2026, 17:27(1) Poster
Beam-induced backgrounds from beam-beam interactions pose a fundamental constraint on detector design at future $e^+e^-$ colliders, driving requirements on subdetector granularity, readout buffer depth, and front-end timing. We have developed a modular, parameter-driven simulation framework, built on the Key4hep software stack, that provides an end-to-end pipeline from beam-beam interactions...
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Vincent Riechers (Universite de Geneve (CH))09/06/2026, 17:28
The ARC detector is a compact RICH-based particle-identification concept proposed for future lepton-collider detectors. In the CLD detector concept, ARC is integrated between the tracking system and the electromagnetic calorimeter, introducing additional material upstream of the calorimeter and requiring compression of the tracking system. The present study does not yet exploit ARC...
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Silke Mobius (Universitaet Bern (CH))09/06/2026, 17:29
CASSIA (CMOS Active SenSor with Internal Amplification) is a proposed technology for 4D tracking with fast timing, where the focus lies on the development of pixel matrices with internal charge multiplication based on monolithic CMOS sensor technologies. The sensor is a novel MAPS which uses gain layers fully integrated in a 180nm imaging process to achieve internal signal amplification....
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Jacopo Fanini (CERN & Université Paris-Saclay)09/06/2026, 17:30
Separate prompt single photon electromagnetic showers from those arising from highly collimated photon pairs produced in boosted neutral pion decays is a critical capability for electromagnetic calorimetry, directly impacting both precision measurements and searches for new physics. This challenge is particularly relevant in the context of the electron-positron phase of the proposed Future...
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Mahmoud AlThakeel (CERN)09/06/2026, 17:31
Future electron–positron colliders such as the Future Circular Collider (FCC-ee) provide a clean environment for precision measurements and searches for physics beyond the Standard Model, including long-lived particles (LLPs). In this context, the muon system plays a crucial role in reconstructing highly displaced signatures that may not leave sufficient information in the inner tracking...
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Huirong Qi (Institute of High Energy Physics, CAS)09/06/2026, 17:32
The Circular Electron Positron Colliders (FCCee and CEPC) were proposed as the Higgs and Z operation in High Energy Physics communities. In the ILD detector concept, as well as in comparable detector designs, the baseline detector design features a high-precision (approximately 100 μm) spatial resolution Time Projection Chamber (TPC) as the main tracking device surround a 3.0T solenoid field....
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Erich Ward Varnes (University of Arizona (US))09/06/2026, 17:33
A status report on the "turbine" style noble liquid EM endcap calorimeter concept for the ALLEGRO detector will be presented. Specific topics will include studies of the optimal segmentation, updated mechanical studies, and the status of tests of the prototype readout board.
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Christoph Schwanda (Austrian Academy of Sciences (AT))09/06/2026, 17:34
The run 2 of the Belle II experiment at the SuperKEKB collider in Tsukuba (Japan) is expected to last until 2031. For the long-shutdown 2 (LS2) in 2032-33 an upgrade plan for the machine and the detector is currently being developed: The final focusing QCS magnets will move 10 cm closer to the IP requiring the construction of a new vertex detector. The inner layers of the drift chamber will...
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Spencer Gessner09/06/2026, 17:35
SLAC is pursuing a number of activities related to machine detector interface (MDI) design, engineering, and performance. These activities include a mockup of the QC1 cryostat, a mockup of services for the vertex and LumiCal detectors, and modeling beam-induced backgrounds with the high performance particle-in-cell (PIC) code WarpX. We provide a timeline for these activities consistent with...
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Spencer Gessner09/06/2026, 17:36
Laser-driven Compton backscattering (CBS) has been proposed as method for controlling the intensity of colliding bunches in the FCC-ee so as to avoid the flip-flop instability caused by intensity asymmetry in colliding bunches. Laser-based collimation has also been proposed as an indestructible collimator for high-intensity electron beams. We have initiated a laboratory-based test program of...
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Peter Kicsiny (SLAC)09/06/2026, 17:37
Particle In Cell (PIC) codes are a key tool for performance optimization of future colliders, notably the FCC-ee. They are used to study beam-beam effects, luminosity, beam background, machine protection and lifetime. The most frequently used open source PIC codes by the collider community (GUINEA-PIG, Xsuite) are not optimized for configurations with a large Piwinski angle, relevant for...
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Mael Le Garrec (Laboratoire d'Annecy de Physique des Particules (CNRS IN2P3-LAPP))09/06/2026, 17:38(1) Poster
Ground motion can significantly impact beam stability in the FCC-ee, potentially degrading luminosity at the interaction point (IP). The study models vibrations of accelerator components, including the interaction region cryostats at the Machine Detector Interface (MDI) and the quadrupole girders in the arcs. Using measured power spectral densities (PSDs) and component-specific transfer...
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Dylan Standen (CERN)09/06/2026, 17:39(1) Poster
The recent LCC optics choice has contributed to Accelerator Beam Transfer (ABT) equipment being repositioned and as this directly impacts the integration aspects and therefor cable lengths a new study is conducted.
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This work provides an overview of integration and space requirements for fast pulsed kicker magnets, septa and their power converters and controls for the FCC-ee booster and... -
Grigorios Sergentanis09/06/2026, 17:40(1) Poster
CERN is currently developing the Future Circular Collider (FCC-ee), a next-generation accelerator complex with a 90.7 km circumference. This poster explores the technical challenges inherent in beam-transfer equipment, specifically regarding the kicker systems from Booster extraction to Collider dump. To reduce the diversity of beam-line components and standardize hardware parameters, this...
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Dora Gibellieri (University of Caen Normandy)09/06/2026, 17:41(1) Poster
The FCC-ee collider in the Z configuration, operating at 45.6 GeV, is particularly sensitive to impedance-driven collective effects. The collimation system is among the dominant contributors to the machine impedance budget, making its optimization crucial for stable operation. This work investigates the impact of collimator jaw length on wakefields and beam dynamics. The results show that...
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Michael Dole (CERN)09/06/2026, 17:42(1) Poster
The future fire detection system for the FCC tunnel will be adapted to non-standard environmental constraints. The large surface area to be protected, the presence of radioactivity, and the long distance between alcoves that can house standard electronics are among the most significant constraints. The current baseline solution relies on smoke detection by air sampling, with a similar system...
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Francesco Pinzauti (CERN)09/06/2026, 17:43(1) Poster
Evaluating production RAG systems poses a fundamental challenge: internal retrieval logic, prompt templates, and model decisions are typically inaccessible, yet systematic quality assurance is essential prior to deployment and throughout a system's lifecycle. This work presents a modular, black-box evaluation pipeline developed in the context of the FCC communication chatbot, a multilingual...
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Mr Xin-Kai Wen09/06/2026, 17:44(1) Poster
Directly probing light-quark Yukawa couplings and their flavor structure remains a major challenge due to their smallness and overwhelming QCD backgrounds. In this talk, we propose a theoretical framework to access these couplings at lepton colliders through transverse spin dependent azimuthal modulations in dihadron fragmentation. These modulations arise from the interference between Higgs...
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Dr Alexander Novokhatski (SLAC National Accelerator Laboratory)09/06/2026, 17:45
We present the latest results of electromagnetic calculations regarding the interaction of the high-intensity beam field with the metal walls of the FCC-ee interaction region beam pipe. This interaction generates a thermal load on the beam pipe walls, which degrades vacuum conditions and can increase the background. We have improved our calculation methodology to evaluate the heat load for...
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Dr Gergely Gabor Barnafoldi (HUN-REN Wigner Research Centre for Physics (HU))09/06/2026, 17:46
The computing demands of the FCC era will exceed those of the HL-LHC by an order of magnitude, with Monte Carlo (MC) event generation persistently consuming the majority of the available CPU budget. For a future heavy-ion programme, where AA event generation is nearly an order of magnitude more expensive per event than pp, the energy cost of generator tuning campaigns risks becoming a limiting...
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Andrea De Vita (CERN & Università di Padova), Brieuc Francois (CERN), Dolores Garcia (CERN), Marko Cechovic09/06/2026, 17:47(1) Poster
Track finding — grouping detector hits into charged-particle trajectories — is traditionally detector-specific and costly to adapt to the new detector concepts proposed for the FCC-ee. Classical combinatorial methods rely on hand-crafted seeding and a detailed detector description, while many machine-learning approaches depend on edge prediction or external density clustering. To bridge these...
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Jacqueline Keintzel (CERN), Sarah Louise Williams (University of Cambridge (GB))09/06/2026, 18:30
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Lina Valle09/06/2026, 18:50
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Laurent Delprat (CERN)10/06/2026, 08:30
The design maturity of the Future Circular Collider (FCC-ee) cryogenic system has progressed significantly from its initial concept in 2014 reaching its feasibility report in 2025. With 3 major reports published in between, being the Conceptual Design Report (CDR) in 2018, the Mid-Term Review Report (MTR) in 2023 and the Feasibility Study Report (FSR) in 2025, the FCC Study is now entering its...
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Chiara Antuono (CERN)10/06/2026, 08:30(2) Oral presentation
Beam coupling impedance is a key performance driver for FCC-ee, which will operate with unprecedented beam intensities in a regime characterized by very short bunch lengths, large vacuum chamber apertures, and an unprecedented machine circumference. These conditions make impedance evaluation and optimization particularly challenging, requiring a careful balance between beam-induced power...
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Ignacio Garcia-Aguirrebeitia Sanchez (CERN)10/06/2026, 08:30(2) Oral presentation
We will summarize the arc magnet functional specification and designs proposed for the updated LCC optics baseline, together with the prototypes plan for the Reference Design Phase.
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Mrs Sophie Valette (HSE Unit)10/06/2026, 08:30(2) Oral presentation
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Giovanni Guerrieri (CERN)10/06/2026, 08:30(2) Oral presentation
FCC distributed computing is advancing toward a WLCG-like model to meet the challenges of planning for a collider 15 years away. Long procurement cycles for data centres and rapid technology shifts mean we must start planning now.
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We currently consolidate our community by adopting CERN Tier 0 resources (SWAN, lxbatch, ml.cern.ch, dedicated computing nodes) while evolving toward distributed... -
Pantelis Kontaxakis (Universite de Geneve (CH))10/06/2026, 08:48(2) Oral presentation
The FCC Physics, Experiments and Detectors program relies on a coherent centralized productions infrastructure to provide datasets for physics analyses, detector performance studies, or other uses during the Reference Design Phase. This talk will present the current status, priorities, and schedule of the FCC MC production and GRID tools activity. It will cover the organization of central...
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Luka Todorovic (Technische Universitaet Wien (AT))10/06/2026, 08:50(2) Oral presentation
We assess the impact of manufacturing-induced uncertainties on the magnetic field quality of FCC-ee collider dipole and quadrupole magnets. The methodology considers both material and geometric uncertainties, which are propagated using probabilistic methods through computational models. To enable efficient uncertainty quantification, surrogate models are developed and validated against...
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Elena Macchia (Sapienza Universita e INFN, Roma I (IT))10/06/2026, 08:55(2) Oral presentation
This contribution presents an ongoing coupling impedance study of the interaction region (IR) for the FCC-ee collider, with a focus on power loss and beam-induced heating in the vacuum chamber.
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The IR design, consisting of the intersection of four beam pipes, is characterized by transitions between round and elliptical cross-sections; despite the smooth geometry designed to minimize the beam... -
Patrycja Laidouni (CERN)10/06/2026, 09:00(2) Oral presentation
The presentation discusses the role of early ecological investigations in supporting the development of the FCC injector baseline at the CERN Prévessin site. It explains why ecological studies are essential at an early stage, not only to describe the existing environment, but also to identify ecological and regulatory sensitivities that may influence future design decisions.
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The presentation... -
Anita Petrovic10/06/2026, 09:00(2) Oral presentation
The current baseline foresees cryogenic cooling at Points H and L for the RF collider and booster systems. Included in the presentation are the latest updates to the cryogenic architecture, heat-load estimates, installed cooling capacity, utility assumptions, and other ongoing parallel studies supporting the cryogenic system design. Together, these activities aim to strengthen the FCC-ee...
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Supasin Sukara (Chiang Mai University (TH))10/06/2026, 09:00(2) Oral presentation
This work presents the electromagnetic and preliminary mechanical design of the sextupole magnet for the FCC-ee collider. The original design, based on the GHC optics requirements, has been revised to comply with the new baseline - LCC optics. Detailed 2D and 3D magnetic simulations were performed to optimize the magnet parameters. The results confirm that the proposed sextupole design fully...
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Juan Miguel Carceller (CERN)10/06/2026, 09:06(2) Oral presentation
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Mr Adam Furman (EPFL - Ecole Polytechnique Federale Lausanne (CH))10/06/2026, 09:10(2) Oral presentation
The buildup of electron clouds (EC) within the beam chamber limits machine performance by causing beam instabilities and other undesirable effects. In this work, we study parametrizations of EC buildup, as well as the impact of photoemission from synchrotron radiation. The buildup of an electron cloud can be modelled as a smooth, logistic-like curve described by three parameters accounting for...
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Luke Von Freeden (CERN)10/06/2026, 09:15(2) Oral presentation
This presentation reviews recent progress in the development of the High Energy Booster (HEB) magnet system. Updates to the designs of the main dipole, quadrupole, and sextupole magnets are presented to address the revised booster optics requirements resulting from changes to the collider optics. Results from the dipole prototyping campaign are reported, including measurements of a second...
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Paul Gessinger (CERN)10/06/2026, 09:24(2) Oral presentation
ACTS (A Common Tracking Software) is an experiment-agnostic, open-source track reconstruction toolkit, originally derived from the ATLAS Inner Detector reconstruction software. It provides a comprehensive set of tracking algorithms covering geometry description, track finding, and track fitting, and has been extended over time to be fully independent of any specific experiment.
With recent...
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Mr John Patrick Salvesen10/06/2026, 09:25(2) Oral presentation
Achieving the target luminosities of FCC-ee requires tight control of the beam orbits and optics at the IP. Important challenges include orbit distortions from machine errors and the coupling and optics perturbations introduced by strong experimental solenoids. This presentation discusses the current status of IP feedback and solenoid compensation schemes for FCC-ee, using experience from...
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Thomas Luc Swerts (CERN)10/06/2026, 09:30(2) Oral presentation
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Mariano Pentella (CERN)10/06/2026, 09:30(2) Oral presentation
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Christiana Staudinger (University of Natural Resources and Life Sciences (BOKU) (AT))10/06/2026, 09:30(2) Oral presentation
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Prof. Sheng-Sen Sun (Institute of High Energy Physics, Chinese Academy of Sciences)10/06/2026, 09:42(2) Oral presentation
The Circular Electron-Positron Collider (CEPC) needs a strong and flexible software system to support detector design, simulation, reconstruction, and physics analysis. The CEPC software (CEPCSW) is part of the Key4hep ecosystem and uses well-established tools: the Gaudi framework for event processing, EDM4hep for data modeling, DD4hep for detector description, Geant4 for simulation, and ROOT...
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Vaibhavi Gawas (CERN / University de Geneve)10/06/2026, 09:45(2) Oral presentation
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Mr Melvin Liebsch (CERN)10/06/2026, 09:45(2) Oral presentation
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Andrew Coleman (CERN)10/06/2026, 10:30(2) Oral presentation
This presentation will focus on the ventilation design decisions taken since the Feasibility Study: specifically, on how the accelerator tunnel is ventilated, both in normal operation and in an emergency, and how the air of the accelerator tunnel is kept within the required temperature range. The results of the Pugh Matrix assessments for the decisions, highlighting safety and environmental...
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Matteo Marcoli (University of Durham)10/06/2026, 10:30(2) Oral presentation
In this talk I will present the calculation of the next-to-next-to-leading order (NNLO) correction to four-jet production at electron-positron colliders. I will highlight the details of the calculation, which is performed with the antenna subtraction technique, present precise phenomenological predictions for the four-jet rate and discuss the agreement with LEP data.
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Lucia Masetti (Johannes Gutenberg Universitaet Mainz (DE))10/06/2026, 10:30(2) Oral presentation
Concepts for highly granular calorimeters with fully embedded electronics have been developed in different technologies within the CALICE and FCAL collaborations with the aim of optimally exploiting the Particle Flow Algorithm for jet reconstruction. Within the DRDCalo collaboration large-scale prototypes allowing to demonstrate also the construction and integration aspects are being built and...
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Nagore Pinillos Zamorano (CERN)10/06/2026, 10:30(2) Oral presentation
This talk shows the latest updates in the magnet powering layout for the FCC-ee, following the LCC optics lattice. An update in the powering strategy and number of power converter is provided.
Additionally, this presentation summarizes a Life Cycle Assessment of a quadrupole trimming magnet powering circuit for FCC applications, evaluating environmental impacts across all life cycle stages....
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Johan Wickström10/06/2026, 10:30(2) Oral presentation
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Alessandro Valenti (University of Basel)10/06/2026, 10:48(2) Oral presentation
We discuss indirect probes of the MSSM at FCC-ee, with particular emphasis on the complementarity between single Higgs production and electroweak precision tests at the Tera-$Z$ run. In addition to flavor-universal contributions to the $STWY$ oblique parameters, we point out important flavor non-universal effects. An example of the latter is the heavy Higgs doublet, which gives tree-level...
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Dr Mikael Mieskolainen (CERN)10/06/2026, 10:50(2) Oral presentation
The ALLEGRO ECAL group is developing a noble liquid electromagnetic calorimeter designed to deliver high granularity, low-noise operation, and excellent energy resolution, meeting the demanding requirements of precision physics measurements at the FCC-ee. Current end-to-end R&D activities span detector-level design, electrode and cold front-end electronics development, simulation and software...
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Timothy Paul Watson (CERN)10/06/2026, 10:55(2) Oral presentation
This presentation shall provide an outline of the current conceptual layout of the FCC Injector Complex and key civil engineering factors that will influence the decision on final placement of the facility. Some of the placement options considered to date will be presented. Geotechnical and groundwater considerations will be presented along with a brief explanation of the work to be done and...
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Andela Rankovic10/06/2026, 10:55(2) Oral presentation
This work presents a system-level framework for the joint CAPEX and OPEX optimization of coupled accelerator subsystems, with environmental impact considered in parallel. The framework integrates models of magnets, power converters, DC cables, civil engineering, electrical equipment, and cooling and ventilation. Results from a comparison of the GHC and LCC optics show that the LCC achieves...
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Daniel Najdrowski (CERN)10/06/2026, 11:00(2) Oral presentation
This contribution presents the ongoing development of the FCC cooling infrastructure architecture within the FCC Reference Design activities.
The presentation will provide an update on the evolution of user cooling requirements and thermal loads, including the recent transition from GHC to LCC beam optics and the expected future evolution of loads currently under development within the FCC...
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Hwi Dong Yoo (Yonsei University (KR))10/06/2026, 11:04
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Jonathan Kriewald (Jožef Stefan Institut)10/06/2026, 11:06(2) Oral presentation
We give an extensive discussion of the displaced signals of heavy Majorana neutrino production at future electron-positron colliders operating at various proposed energies in the context of the Left-Right symmetric model. A comprehensive collection of channels is taken into account, ranging from those featuring $W$ and $W_R$ mediation to those induced by scalar mixing and gauge/scalar boson...
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Catia Milardi (INFN e Laboratori Nazionali di Frascati (IT))10/06/2026, 11:15(2) Oral presentation
The FCC-ee collider requires excellent lepton beam quality from the injector complex for both bootstrap and top-up operations. Given the high charge requirements, and the operational needs of the intermediate acceleration stage in the booster ring, the injector complex must deliver alternating particle trains with opposite charges.
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During the Feasibility Study, various design options and... -
Dr Jayakrishnan Harikumaran (CERN)10/06/2026, 11:20(2) Oral presentation
This presentation addresses the electrical powering of RF amplifiers, specifically tristrons and solid-state amplifiers, for both the FCC-ee collider and booster.
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The baseline solution is a centralized system delivering 130 MW through a high-power converter.
This has been established with an optimization module using Genetic algorithm.
Few of the challenges for this powering scheme is... -
Anders Kvellestad (University of Oslo)10/06/2026, 11:24
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Tae Jeong Kim (Hanyang University (KR))10/06/2026, 11:24(2) Oral presentation
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Inigo Martin Melero (CERN)10/06/2026, 11:30(2) Oral presentation
In the present contribution, an update on the cooling towers and water services management for FCC is thoroughly discussed. Cooling towers conform the main heat rejection mechanism from FCC to the environment. The raw water network supplies make-up to compensate for evaporation losses in the cooling towers, among others. To reduce the make-up water consumption, recycling of the cooling tower...
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Shalva Bilanishvili10/06/2026, 11:40(2) Oral presentation
The design of the FCC-ee damping ring is progressing, with ongoing optimisation of beam parameters and key accelerator systems.
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Accordingly, the coupling impedance model is updated to reflect the latest vacuum chamber and hardware layouts.
In parallel, the estimates of collective effects and impedance-related instabilities are being refined.
This talk presents the current wakefield and... -
Francesco Bardi10/06/2026, 11:40(2) Oral presentation
The HTS4 project, now in its final year, is developing a nested high-temperature superconducting quadrupole-sextupole magnet system for the FCC-hh arcs. This compact, combined-function design targets significant reductions in electrical consumption compared to conventional arc magnet schemes. We present the current status of the project, including design progress, prototype development, and...
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Joao Guimaraes da Costa (IHEP)10/06/2026, 11:42(2) Oral presentation
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Duarte Da Silva Feiteira10/06/2026, 11:42
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Lotta Mether (CERN)10/06/2026, 13:30(2) Oral presentation
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Andrzej Konrad Siodmok10/06/2026, 13:30
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Juraj Smiesko (CERN)10/06/2026, 13:48(2) Oral presentation
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Giacomo Broggi (CERN)10/06/2026, 13:50(2) Oral presentation
The Future Circular electron-positron Collider (FCC-ee) is designed to explore physics beyond the present energy and luminosity frontiers for leptons. To achieve its physics goals, the FCC-ee must store and collide very high-intensity lepton beams, with stored beam energies of up to 17.8 MJ — posing unique collimation challenges. A robust and reliable beam collimation system is therefore...
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Andrea De Vita (CERN & Università di Padova)10/06/2026, 14:06(2) Oral presentation
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Yann Dutheil (CERN)10/06/2026, 14:15(2) Oral presentation
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Sanghyun Ko (CERN)10/06/2026, 14:24(2) Oral presentation
This talk reviews the current status and plans for the reconstruction, covering particle-flow performance and object-level reconstruction (leptons, photons, jets) across various detector concepts of FCC-ee. We will also review the status of high-level reconstruction, such as jet flavor tagging and tau reconstruction, where modern machine-learning-based approaches are driving substantial gains.
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Jacqueline Keintzel (CERN)10/06/2026, 14:30(2) Oral presentation
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Apranik Fatehi (University of Hamburg - CERN - DESY)10/06/2026, 14:42(2) Oral presentation
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Sofia Kostoglou (CERN)10/06/2026, 14:45(2) Oral presentation
FCC-ee performance relies on ultra-low vertical emittances, making the machine highly sensitive to time-dependent perturbations. This work presents first beam dynamics studies of the impact of ground motion and power supply ripple. For ground motion, a global orbit feedback model based on LHC experience is used to evaluate correction efficiency and derive first bandwidth requirements. The...
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Dr Ciprian Plostinar (ESS)10/06/2026, 16:00(2) Oral presentation
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Katja Mankinen (CSC)10/06/2026, 16:25
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Guillaume Garros (Nokia)10/06/2026, 16:50
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Teemu Siiskonen (STUK)10/06/2026, 17:10
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Federico Capoani (CERN)11/06/2026, 08:30(2) Oral presentation
We show a newly optimised lattice for the FCC-hh, which, enhancing the FSR baseline, is capable to reach a beam energy of 44.1 TeV using 16 m dipoles. The new lattice, with fully matched optics, is presented along sensitivity studies to see what is the attainable energy depending on other parameters such as injection energy. Furthermore, the possibility of an alternative lattice based on...
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Jack Heron (CERN)11/06/2026, 08:30(2) Oral presentation
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Zdenek Vostrel (CERN / EPFL)11/06/2026, 08:30(2) Oral presentation
The FCC-ee electron source must deliver up to 5 nC in four bunches at 200 Hz with shot-to-shot charge variation for top-up injection. The baseline RF photogun design has been studied in ASTRA simulations, demonstrating compliance with following pre-injector complex. A charge variation scheme, based on modulating the transverse emission radius to maintain constant charge density, is proposed to...
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Marco Delmastro (CNRS/IN2P3 LAPP)11/06/2026, 08:30(2) Oral presentation
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Andre Henriques (CERN)11/06/2026, 08:30(2) Oral presentation
A first version of the Safety Concept for the Future Circular Collider (FCC) was presented in the Feasibility Study report. It underwent peer review by both internal and external expert committees, which confirmed the absence of showstoppers at this stage while identifying a comprehensive set of aspects requiring further development.
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The current objective is to build on the foundation set a... -
Ada Malagnino (CERN)11/06/2026, 08:48(2) Oral presentation
The Future Circular Collider (FCC) proposes an unprecedented evacuation concept for long underground tunnels, relying on autonomous vehicles to support emergency egress over distances of several kilometres. In the event of a fire, smoke will be contained through a combination of static and dynamic confinement through fire compartments and an air-management system operating in emergency...
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Dr Iryna Chaikovska (CNRS/IJCLab)11/06/2026, 08:50(2) Oral presentation
The high-luminosity FCC-ee collider will require a low-emittance positron beam with sufficient intensity to ensure efficient top-up injection and short filling times. Since the FCC-ee Feasibility Study Report, design studies of the positron source have continued, with particular focus on the RF frequency and aperture of the capture and positron linacs. The present baseline relies on a...
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Dr Ezio Todesco (CERN)11/06/2026, 08:50(2) Oral presentation
In this talk we will give the status of the High Field Magnets programme, focussed on the development of the main dipoles for the FCC-hh. After reviewing the baseline and the options, we will outline the main development lines both in LTS and HTS, and present the recent results and challenges.
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Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))11/06/2026, 08:50(2) Oral presentation
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Mrs Johanna Mattiasson11/06/2026, 08:52(2) Oral presentation
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Sarah Louise Williams (University of Cambridge (GB))11/06/2026, 09:05(2) Oral presentation
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Jannes Hopman11/06/2026, 09:06(2) Oral presentation
Fire safety and cryogenic hazards are critical considerations in the design of the Future Circular Collider (FCC), where its underground nature and high-energy systems introduce multiple risks to personnel. This work presents a combined numerical investigation of fire scenarios and accidental helium releases, addressing two key hazards in the FCC design. The simulations support validation of...
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Qingjin Xu11/06/2026, 09:10
The Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences is pursuing the advanced high field HTS superconducting magnet technology for the next-generation particle accelerators. Significant progresses have been achieved in the past years: world’s first achievement of 14 T dipole field in the aperture with ReBCO insert coils at 4.2 K; the IBS model solenoids reached 49 A...
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Mr Yuting WANG (CNRS/IJCLab)11/06/2026, 09:10(2) Oral presentation
A high-performance positron source is essential for FCC-ee to provide the high-intensity, low-emittance beams required for rapid injection, especially in the Z-pole operation mode. In the FCC-ee Feasibility Study, the reference positron source is based on a 2.86 GeV electron drive beam impinging on a 15 mm tungsten target, followed by an HTS matching device and a 2 GHz travelling-wave RF...
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Delphine Domange (Universite Libre de Bruxelles (BE))11/06/2026, 09:14(2) Oral presentation
The FCC-ee will store 17.5 MJ per beam at Z-pole operation, with extremely high energy densities arising from the very small beam emittances. Powering failures are among the fast failure modes that set stringent requirements on the machine protection system, and their characterisation is essential for defining interlocking and detection strategies.
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This presentation reports on powering... -
Davide Bozzato (CERN)11/06/2026, 09:24
Radiation Protection (RP) studies are essential to ensure that the advancing design of FCC-ee systems and infrastructures during the Reference Design phase meets the radiological safety objectives for personnel and for the environment. Radiation transport simulations with the FLUKA Monte Carlo code are carried out to support design optimisation and to anticipate potentially critical radiation...
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Andrew Gilbert (LLR / CNRS / École Polytechnique (FR))11/06/2026, 09:25
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Simona Bettoni11/06/2026, 09:25(2) Oral presentation
The FCC-ee injector complex is designed to deliver tunable, high-charge electron and positron bunches for injection into the collider over a centre-of-mass energy range of 90–365 GeV. A key component is the high-energy (HE) linac, which accelerates the beam from approximately 3 to 20 GeV prior to injection into the booster.
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The present design has been established through comprehensive... -
Ingrid Midtbust Hjelle (EPFL - Ecole Polytechnique Federale Lausanne (CH))11/06/2026, 09:36(2) Oral presentation
Interactions between macroscopic dust grains and circulating particle beams have been observed in a wide range of accelerators and have the potential to significantly limit the performance of FCC. This presentation discusses the three main phases of beam-dust interaction: dust release from the surface, dust motion and dynamics, and potential disintegration of the dust grain by impacting beam...
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Scott Williams11/06/2026, 09:42(2) Oral presentation
This presentation focuses on the principles of access control and access safety system’s design for the FCC-ee. Main hazards that the access safety system protects from, and the methodology for reaching the reference design are presented. Possible Elements Important for Safety (EIS), capable of stopping the beams in the FCC are discussed. Principles of sectorising the FCC complex for access...
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Andrea Latina (CERN)11/06/2026, 09:45
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Duccio Abbaneo (CERN)11/06/2026, 10:30(2) Oral presentation
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Daniele Calzolari (CERN)11/06/2026, 10:30(2) Oral presentation
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Adnan Ghribi (Centre National de la Recherche Scientifique (FR))11/06/2026, 10:30(2) Oral presentation
We will give an overview of the main features of the FCC-ee high-energy booster This overview will cover the main changes in the booster layout, optics, tuning, and booster operation.
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Patricia Borges de Sousa (CERN)11/06/2026, 10:30(2) Oral presentation
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Ivan Karpov (CERN)11/06/2026, 10:30(2) Oral presentation
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Hucheng Chen (Brookhaven National Laboratory (US))11/06/2026, 10:48(2) Oral presentation
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Lina Valle11/06/2026, 10:48(2) Oral presentation
The FCC-ee full-size booster synchrotron prepares electron and positron bunch trains alternately for all foreseen beam energies from 45.6 to 182.5 GeV and operation modes such as filling the collider from scratch or top-up. These require optimizing the energy ramps and RF voltage programs to achieve the small transverse beam sizes for injection in the collider while maintaining longitudinal...
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Keon Hee Kim (GANIL)11/06/2026, 10:55(2) Oral presentation
A first comprehensive impedance model for the FCC-ee High Energy Booster (HEB) is presented, moving beyond the previously considered resistive wall only description. The updated model incorporates major impedance sources, including RF cavities, bellows, beam position monitors, and tapers, based on a combination of 3D electromagnetic simulations and analytical approaches. This constitutes the...
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Alexey Vorozhtsov (CERN)11/06/2026, 10:55(2) Oral presentation
Three gradient dipole design options were investigated as candidates for the FCC-hh transfer lines: an electromagnet (EM), a permanent-magnet (PM) design based on NdFeB, and a PM design based on Sm₂Co₁₇. A preliminary 2D design study was carried out to evaluate the engineering parameters and associated costs of each option. The obtained results were compared and discussed.
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Richard Cowan11/06/2026, 10:55(2) Oral presentation
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Jinlong Zhang (Argonne National Laboratory (US))11/06/2026, 11:06(2) Oral presentation
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Paula Hickersberger (Vienna University of Technology (AT))11/06/2026, 11:06(2) Oral presentation
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Dr Silvio Candido (CERN)11/06/2026, 11:20(2) Oral presentation
At the FCC-ee, beamstrahlung radiation generated at the interaction points will produce intense photon beams requiring dedicated absorbers downstream of the collision regions. At Z-pole operation, each photon beam will carry approximately 370 kW of power, creating a challenging thermal load for conventional solid absorbers. A flowing liquid-lead beam dump is therefore under development as a...
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Sudhanshu Thakur (Deutsches Elektronen-Synchrotron (DE))11/06/2026, 11:20(2) Oral presentation
The large circumference of the FCC-ee booster makes natural radiation damping very slow at the 20 GeV injection energy, while the demanding Z mode operational scenario simultaneously requires maximum beam charge within a minimal cycle time. This prevents the last injected bunches from meeting collider injection requirements. To address this, the use of damping wigglers is explored, utilizing...
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Paolo Giacomelli (Universita e INFN, Bologna (IT)), Paolo Giacomelli (INFN Sezione di Bologna)11/06/2026, 11:24
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Hermann Pommerenke (CERN)11/06/2026, 11:24(2) Oral presentation
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Hannes Bartosik (CERN)11/06/2026, 11:40(2) Oral presentation
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Gabriel Banks (CERN)11/06/2026, 11:40(2) Oral presentation
The external shielding for the FCC-ee arc dipoles has been refined ahead of design studies and prototyping with two industrial manufacturers of lead components. Recent thermal simulations evaluated cooling with aluminium cold plates, assessing their suitability for maintaining acceptable lead temperatures and minimising heat load to the FCC tunnel air. This contribution presents the updated...
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Taikan Suehara (ICEPP, The University of Tokyo (JP))11/06/2026, 11:42(2) Oral presentation
ILD (International Large Detector) is a long-standing detector concept optimized for the particle flow. While it is originally designed for ILC, it is now also adapted as a FCC-ee detector design.
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I will present the basic concept of ILD, optimization and physics studies in the past, status of detector development as well as recent design and performance studies on adapting circular colliders.... -
Wolfgang Hofle (CERN)11/06/2026, 11:42(2) Oral presentation
This contribution will summarize the transverse feedback strategies for the FCCee. For the feedback kickers, dedicated locations have been identified in the LCC optics for the installation of the kickers. The kicker locations are predominately chosen to be optimally placed for the application as depolarizer kicker in the vertical plane, with all kickers placed at the end of arcs around two...
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Angela Potet11/06/2026, 13:30(2) Oral presentation
This work presents the design and optimization of the FCC-ee beam extraction system and its associated dump transfer line, with a focus on beam, geometric and machine protection constraints. The extraction system is based on fast kicker magnets and septa, whose number and location are optimized to guarantee efficient beam extraction with minimal uncontrolled losses, to minimize the risks posed...
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Joshua Falco Beirer (CERN)11/06/2026, 13:30
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Giulia Nigrelli (Sapienza Universita, INFN-LNF, CERN)11/06/2026, 13:30(2) Oral presentation
The electron–positron Future Circular Collider (FCC-ee) is a proposed high-energy lepton collider designed to achieve unprecedented luminosity and precision in the study of fundamental particle physics. To fully exploit this potential, it is crucial to control beam-induced experimental backgrounds to ensure safe operation and optimal detector performance. This is particularly challenging due...
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Axel Neumann (Helmholtz-Zentrum Berlin)11/06/2026, 13:30(2) Oral presentation
For about 25 years HZB and formerly BESSY have conducted research on superconducting radio frequency (SRF) cavities mainly for continous-wave applications, like Energy Recovery Linacs, Free-Electron-Lasers and light source storage rings. In more recent years, HZB also joined EU Horizon funded programms and further third party funding to work on the characterization of new SRF materials...
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Ulrich Einhaus (KIT - Karlsruhe Institute of Technology (DE))11/06/2026, 13:48
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Shahnam Gorgi Zadeh (CERN)11/06/2026, 13:48(2) Oral presentation
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Johannes Ruf (CERN)11/06/2026, 13:50(2) Oral presentation
Kicker magnets and generators for six distinct beam transfer systems of the FCC-ee are currently under development: the Collider injection and dump systems, the Booster injection, extraction, and dump systems, and the Damping Ring.
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As critical requirement parameters of several of these systems have not yet been fully defined, the current design solutions target preliminary baseline... -
Jan Eysermans (Massachusetts Inst. of Technology (US))11/06/2026, 13:55(2) Oral presentation
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Matthias Liepe11/06/2026, 14:06(2) Oral presentation
This presentation will give an overview of recent R&D at Cornell on advanced materials for next-generation SRF technology, showing the potential for substantial enhancement in cavity performance.
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Jona Dilg (University of Zurich (CH))11/06/2026, 14:06
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Armin Ilg (University of Zurich)11/06/2026, 14:10(2) Oral presentation
Beam-induced backgrounds (BIBs) are a critical constraint for FCC-ee operation, particularly at the Z pole with instantaneous luminosities reaching $1.4\times 10^{36} \text{cm}^{-2}\text{s}^{-1}$. BIBs strongly influence the design of the machine–detector interface (MDI), as well as the layout and technology choices of detectors.
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Focusing on the vertex detector and silicon wrapper, this... -
Lucien Porta (CERN)11/06/2026, 14:10(2) Oral presentation
The Future Circular Collider (FCC-ee) requires a dedicated system to separate counter-rotating electron and positron beams in the common RF sections at point PH while preserving beam quality and preventing synchrotron radiation toward the superconducting RF cavities. This contribution presents a novel Electro-Magnetic Separator (EMS) topology that combines an under-vacuum electrostatic device...
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Mahmoud Ali (University of Bologna)11/06/2026, 14:24
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Kellen McGee (Fermi National Accelerator Laboratory)11/06/2026, 14:24(2) Oral presentation
800 MHz bulk niobium superconducting RF cavities are a fundamental, and sizeable, component of the FCC machine at all operating points. In the Booster, for Z, W, and H operating points, there are 112 cavities in 28 cryomodules. For TTbar operation, there will be a total of 448 cavities in the booster in 112 cryomodules, The FCC cavity performance specifications currently sit at the upper limit...
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Giorgia Favia (CERN)11/06/2026, 14:30(2) Oral presentation
This contribution presents the current maturity status of the FCC-ee beam transfer systems work packages for the FCC, covering optics, kickers, and septa from the injector complex up to the collider ring.
A common maturity framework, aligned with the FCC project schedule, is applied across all systems to identify the current level of development, the main technical challenges, and the...
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Alessandro Frasca11/06/2026, 14:30(2) Oral presentation
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Kostas Sarakinos (University of Helsinki)11/06/2026, 14:42(2) Oral presentation
High power impulse magnetron sputtering (HiPIMS) is a physical vapor deposition method which turns a conventional magnetron source into an ion source. This is achieved by applying power to a sputtering cathode in the form of short (typically <200 µs) unipolar pulses of low frequency (<1 kHz) to create an ultra-dense plasma where electron-impact ionization collisions become effectively...
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Andreas Loeschcke Centeno (CERN)11/06/2026, 14:42
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Daniel Jeans11/06/2026, 14:45(2) Oral presentation
We will review current estimates of the background conditions in the central trackers of detectors at FCCee, comparing various background sources, MDI designs, and tracker technologies.
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Zhihui Mu (Insititute of High Energy Physics,CAS)11/06/2026, 15:30(2) Oral presentation
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Jasper Burvill (The University of Manchester (GB))11/06/2026, 15:30(2) Oral presentation
Updates on the design of the inverse Compton polarimeter for the FCCee LCC optics are presented, highlighting progress made and remaining challenges. Extensive simulations of the polarimeter have been performed with BDSIM, a Monte Carlo-based particle tracking tool designed for accelerator and beamline modelling. Outputs of the simulations have been put through a digitisation algorithm to...
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Christian Carli (CERN)11/06/2026, 15:30(2) Oral presentation
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Dr Yongsheng Ma11/06/2026, 15:50(2) Oral presentation
This presentation outlines the optimization of the vacuum system for the Circular Electron Positron Collider (CEPC) and the core R&D and construction progress of its supporting NEG (Non-Evaporable Getter) coating automated production line, which is the key implementation carrier of the project’s large-scale vacuum chamber manufacturing. The CEPC, featuring a 306-kilometer, encompasses linear...
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Daniel Sittard (CERN and Karlsruhe Institute of Technology (KIT))11/06/2026, 15:52(2) Oral presentation
Resonant kicker designs with peak shunt impedance at $80~\mathrm{MHz}$, $160~\mathrm{MHz}$ and $320~\mathrm{MHz}$ are compared with the baseline design of a matched stripline. The reduced relative bandwidth of these higher frequency kickers offers advantages for the design of the needed RF driving hardware. Higher-order-mode couplers are foreseen to damp beam-induced voltage. The signals on...
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Alexej Grudiev (CERN)11/06/2026, 15:55(2) Oral presentation
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Kacper Lasocha (CERN)11/06/2026, 16:10(2) Oral presentation
Given the size of the system, and importance for FCC operation, the studies on the Beam Position Monitor system is one of the main efforts of the Beam Instrumentation team. This talk presents recent progress in electromagnetic pick-up design, along with preliminary discussion on expected performance in relation to operational requirements. Considerations on system integration into the...
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Zhe Duan (IHEP)11/06/2026, 16:14(2) Oral presentation
A laser-Compton polarimeter has been set up at the BEPCII electron storage ring, which will facilitate R&D of Compton polarimetry, resonant depolarization and radiative depolarization effects, in the content of future circular colliders. The status and future plans of this instrument will be reported. Besides, recent progress in the beam polarization studies for CEPC will also discussed.
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Wolfgang Bartmann (CERN)11/06/2026, 16:20(2) Oral presentation
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Prof. Peng Sha (IHEP)11/06/2026, 16:30(2) Oral presentation
The Circular Electron Positron Collider (CEPC), which was proposed by the IHEP in 2012, is a 100-km collider with a center-of-mass energy of 90–240 GeV for Z, W, and Higgs bosons. CEPC is capable of producing 1000000 Higgs bosons within 10 years and is regarded as a Higgs factory. The SRF system of the CEPC is critical and challenging owing to the wide range of beam energies and currents,...
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Guy Wilkinson (University of Oxford (GB))11/06/2026, 16:36(2) Oral presentation
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Anahita Omoumi11/06/2026, 16:40(2) Oral presentation
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Roddy Cunningham (CERN)12/06/2026, 08:30(2) Oral presentation
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Charline Marcel (CERN)12/06/2026, 08:45(2) Oral presentation
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Thomas Geoffrey Lucas12/06/2026, 09:00(2) Oral presentation
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Sofia Kostoglou (CERN)12/06/2026, 09:20(2) Oral presentation
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Ivan Karpov (CERN)12/06/2026, 09:45(2) Oral presentation
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Jacqueline Keintzel (CERN)12/06/2026, 10:40(2) Oral presentation
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Giulia Nigrelli (Sapienza Universita, INFN-LNF, CERN)12/06/2026, 10:55(2) Oral presentation
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Brieuc Francois (CERN)12/06/2026, 11:10(2) Oral presentation
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Lina Valle12/06/2026, 11:40(2) Oral presentation
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Frank Zimmermann (CERN)12/06/2026, 11:55
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Frank Zimmermann (CERN), Michael Benedikt (CERN)12/06/2026, 12:05(2) Oral presentation
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Tiina Salmi (Tampere University of Technology, Finland)(2) Oral presentation
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Rhitaja Sengupta (BCTP and Physikalisches Institut der Universität Bonn, Germany)
We propose a fundamental shift in the search for beyond the Standard Model long-lived particles (LLPs) at high-luminosity hadron colliders by prioritizing physical background suppression over traditional inner tracking. We introduce DELIGHT-SHIELD, a dedicated detector design for a 100 TeV Future Circular Collider at a dedicated interaction point for LLP searches. By replacing the inner parts...
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Josh Bendavid (CERN)(2) Oral presentation
The uncertainty on the measurement of the Z mass at FCC-ee is expected to be dominated by the systematics on the absolute beam energy calibration. While measurements based on resonant depolarization and related methods are expected to give excellent precision, having an independent measurement to cross-check or reduce systematic uncertainties would be of great benefit for the precision...
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Johannes Gutleber (CERN)(2) Oral presentation
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(2) Oral presentation
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Jacopo Fanini (CERN & Université Paris-Saclay)
The LEP data represents the most precise and highest centre-of-mass energy sample of $e^{+}e^{−}$ collision data collected to date. Numerous scientific articles have been published since the conclusion of the experiments, underscoring the ongoing relevance of this dataset and the need to secure its long-term availability according to FAIR data preservation principles. These data could also...
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Dolores Garcia (CERN)
We present two LLM-driven agentic systems that automate end-to-end tasks related to code development for reconstruction algorithm and physics analysis workflows for the Future Circular Collider (FCC).
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GaudiFactory translates a natural-language
prompt into a compilable, runnable Gaudi algorithm, complete
with CMake configuration, a Python steering file, and validation plots.
FCC Fast Full... -
Oscar Sacristan De Frutos (CERN)(2) Oral presentation
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Valdis Dombrovskis (European Commission)(2) Oral presentation
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Sofia Giappichini (KIT - Karlsruhe Institute of Technology (DE))
The Future Circular Collider (FCC) stands at the forefront of the European Strategy for Particle Physics as the future flagship project at CERN. The H$\to\tau\tau$ decay, featuring a large branching ratio, clean identification in the FCC-ee environment, and the possibility to reconstruct polarization information, is an excellent channel to measure Higgs boson properties.
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This work shows the... -
Stefanie Hurschler (UZH)
We investigate the rare decay $Z \to 6\mu$, which is allowed in the Standard Model (SM) with an estimated branching ratio ($\mathcal{BR}$) of $\mathcal{O}(10^{-10})$, and assess its potential as a probe for physics beyond the SM (BSM) at the FCC-$ee$. In particular, we study a dark sector scenario with a dark photon $A'$ and a dark Higgs boson $h_D$, arising from a broken $U(1)_D$ gauge...
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Dr Ezio Todesco (CERN)(2) Oral presentation
In this talk we will give the present status of HFM programme, with targets for 2030 and 2035, LTS and HTS R&D plans, and recent achievements.
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Johannes Gutleber (CERN)(2) Oral presentation
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