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FLARE - ATLAS Detector Operation and Phase-II Upgrade at the CERN Large Hadron Collider (LHC)

English title FLARE - ATLAS Detector Operation and Phase-II Upgrade at the CERN Large Hadron Collider (LHC)
Applicant Iacobucci Giuseppe
Number 201478
Funding scheme FLARE
Research institution Département de physique nucléaire et corpusculaire Université de Genève
Institution of higher education University of Geneva - GE
Main discipline Particle Physics
Start/End 01.04.2021 - 31.03.2025
Approved amount 4'966'639.00
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Keywords (2)

Elementary particle physics; LHC-ATLAS-silicon tracker-HL-LHC-Upgrade

Lay Summary (French)

Lead
Le Grand collisionneur de hadrons (Large Hadron Collider, LHC) du CERN est l'un des projets scientifiques les plus ambitieux que l'homme ait entrepris à ce jour. L'accélérateur et ses expériences, impliquant plusieurs milliers de physiciens et d'ingénieurs, ont déjà permis la découverte du boson de Higgs qui explique le mécanisme qui permet la génération de la masse de particules élémentaires, et qui a complété le modèle standard des particules élémentaires, la théorie développé au cours des 50 dernières années et qui permet de décrire les interactions électromagnétiques, faibles et fortes.
Lay summary
Les recherches au LHC ne se terminent pas avec la découverte du boson de Higgs, et les expériences recherchent avec ferveur la matière noire et de nouveaux phénomènes, comme par exemple la supersymétrie.
Afin de tirer le meilleur parti de l'accélérateur, le CERN a approuvé le programme LHC à haute luminosité (HL-LHC) qui, au cours de la décennie 2027-2037, permettra de multiplier par dix les données prises jusqu'en 2024 dans le programme actuel.
Pour faire face au très grand nombre de collisions qui se produiront à chaque fois que les paquets de protons des faisceaux se croisent pendant la période HL-LHC (jusqu'à 200 collisions superposées a une fréquence de 40 MHz), les expériences du LHC nécessitent une mise à niveau majeure.

Ce projet porte sur les mises à niveau nécessaires au détecteur ATLAS du LHC qui sont sous la responsabilité des groupes de recherche suisses. La plus importante de ces contributions concerne la construction du nouveau détecteur de pixels au silicium.
Direct link to Lay Summary Last update: 09.04.2021

Responsible applicant and co-applicants

Employees

Associated projects

Number Title Start Funding scheme
181984 Exploiting LHC data with machine learning and preparations for HL-LHC 01.10.2018 Project funding (Div. I-III)
204241 Exploring Physics Beyond the Standard Model with Pixelated Particle Detectors 01.10.2021 Project funding (Div. I-III)
193716 Robust Deep Density Models for High-Energy Particle Physics and Solar Flare Analysis (RODEM) 01.12.2020 Sinergia
173601 FLARE - ATLAS Detector Operation and Phase-II Upgrade at the CERN Large Hadron Collider (LHC) 01.04.2017 FLARE
188489 High-Energy Hadron Interactions at the CERN LHC with the ATLAS and the FASER experiments 01.10.2019 Project funding (Div. I-III)
175597 Exploring hadronic decays of the Higgs boson at the LHC ATLAS experiment and its HL-LHC upgrade 01.02.2018 Project funding (Div. I-III)
188442 Search for new physics with high precision tracking detectors 01.10.2019 Project funding (Div. I-III)

Abstract

The ATLAS Collaboration is made of 181 institutions from 38 countries, with around 2900 scientists including about 1200 PhD students. The Swiss ATLAS community consists in 36.9 FTEs: 3.7 professors, 2.4 staff physicists, 10 postdocs, 12 PhD students and 8.8 engineers and technicians. The Bern and Geneva groups are founding members of the ATLAS Collaboration. The Swiss groups had a major role in the construction of the present ATLAS detector, with a contribution of 24MCHF (~4.5%) to the CORE construction costs, and had major responsibilities in the silicon strip detector, the calorimeter electronics, the TDAQ and the IBL. The Swiss groups have also been strongly involved in the operation of the detector and the analysis of the data, with several PhD theses delivered each year.This funding request deals with the continuation of the ATLAS Collaboration long-term research project, which now foresees the upgrade of the ATLAS detector to be able to meet the physics targets of the High-Luminosity LHC (HL-LHC) programme. During the 2027-2037 HL-LHC running period, the accelerator plans to deliver a total of 3000 fb-1 to ATLAS, exploiting a nominal levelled luminosity of 5x10^34 cm-2 s-1 and an ultimate levelled luminosity of 7.5x10^34 cm-2 s-1, with consequent pile-up levels respectively of 140 to 200 events in average per bunch crossing. The detailed scope of the ATLAS HL-LHC (Phase-II) upgrades is described in the six TDRs published by the Collaboration. In 2019, the MoUs for the Muons, LAr and Tile calorimeters, ITk Strip Subdetector and ITk Common Items, ITk Pixel, TDAQ and Phase-II Common Items were opened for signature. The last four MoU’s are relevant to the Swiss activities. For the HL-LHC upgrade, the Swiss community decided to concentrate on the new silicon pixel detector and on the TDAQ system, and asks to contribute to the ATLAS Phase-II upgrade CORE construction costs with 6.8MCHF (2.4%). Supported by the SNSF FLARE grants 20FL20_160474 and 20FL20_173601, a vigorous R&D program went on in Switzerland for the HL-LHC upgrade, which included R&D’s for the future silicon-pixel detector (mechanics; monolithic pixel sensors; readout; track trigger; design, simulation and optimization of the layout) and several physics studies. The ATLAS Swiss community is presently deeply involved in the prototyping and in the construction of the Pixel detector and of the TDAQ system for the HL-LHC running period.
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