Series of exhibition banners on the history of the ATLAS Experiment. Covers milestones from 1992 to today. Translated into Italian by the ATLAS Italia Outreach team.

Dans le cadre de l’événement : “Progrès dans l’étude de faisabilité du Futur Collisionneur Circulaire du CERN”, présentation de Christophe Grojean sur “EXPLORER L’INCONNU“

As part of the event: "Progrès dans l'étude de faisabilité du Futur Collisionneur Circulaire du CERN", presentation of David Chevalier about Progrès de l'étude de faisabilité du Futur collisionneur circulaire (FCC)Dans le cadre de l’événement : “Progrès dans l’étude de faisabilité du Futur Collisionneur Circulaire du CERN”, présentation de David Chevalier sur les progrès de l’étude de faisabilité du Futur Collisionneur Circulaire (FCC).

CERN 20

The FELIX system, introduced for ATLAS in LHC Run 3, is set to undergo significant evolution for Run 4. This evolution, dubbed the Phase-II upgrade, will expand to serve all ATLAS subdetectors and will feature about 350 servers equipped with custom PCIe FELIX cards and dual port 200 GbE network interfaces. This upgraded system will handle detector data at a readout rate of 1 MHz, resulting in a total throughput of 4.6 TB/s on the high performance network. The latest design of the new FELIX PCIe card for Run 4, named FLX-155, with an AMD Versal Premium VP1552 FPGA/SoC at its heart comes with improved specifications, such as a PCIe Gen5x16 interface, four optical links for Timing, Trigger, and Control, 48 optical links operating at speeds up to 25 Gb/s to interface with front-end electronics and an additional 100 Gigabit Ethernet connection. The FLX-155 is a follow-up of the FLX-182 card, which is equipped with an AMD Versal Prime VM1802 FPGA/SoC, a PCIe Gen4x16 interface and 24 optical links with speeds up to 25 Gb/s. Both the FLX-155 and the FLX-182 have undergone a preliminary hardware design review in January 2024, and are foreseen to be used in the FELIX Phase-II upgrade. The first prototype of the FLX-182 was delivered in January 2023, the first prototype for the FLX-155 will be delivered in Q3 2024. The FLX-155 and the FLX-182 will run redesigned and upgraded FELIX firmware, which has undergone a preliminary design review in January 2022. The firmware's primary objectives include decoding and transferring data from front-ends to server memory, as well as managing precise timing, trigger, and control information distribution. New constraints on timing distribution in the order of picoseconds introduce new challenges. Most notably, accurately re-determining the phase of the clock recovered by the high-speed GTYe5 deserializers of the new AMD Versal technology after each reset is a very challenging. Methods have been designed both in hardware and firmware, allowing FELIX to guarantee a clock distribution with a reproducible phase within the requirements. To complement PCIe card and also server hardware upgrades, the software running on the FELIX server will also be enhanced to cope with increased data and trigger rates, ensuring smooth operation during Run 4 of the ATLAS experiment.

The life of CERN community presented on 22 posters.

At CERN, we probe the fundamental structure of particles that make up everything around us. We do so using the world’s largest and most complex scientific instruments. This visual exhibition focuses mainly on photos, offers visitors the opportunity to explore CERN through 18 posters.

History of the Universe

CERN technologies: from fundamental research to our everyday lives. Since 1954, the world-class research performed at CERN helps uncover what the universe is made of and how it works: here, scientists from all over the world study elementary particles – invisible to the eye – through complex and often gigantic instruments.

The Upstream Tracker (UT) is a crucial component in the LHCb tracking system installed in the Upgrade I. The UT is a silicon microstrip detector that speeds up track reconstruction, reduces the rate of ghost tracks, and improves reconstruction of long-lived particles. LHCb is planning Upgrade II during Long-Shutdown 4 aiming at increasing the peak luminosity by a factor of 7.5. The event pile-up and occupancies will be far beyond the design of the current UT, while radiation damage and pattern recognition will also be challenging. The plan of a new UT using MAPS sensors is proposed. The major sensor technology options will be discussed. The digitization and simulation of the MAPS-based UT will be introduced. Based on the simulation, optmization of the system design is performed, and impact of various operation scenarios is studied.