ATLAS experiment
CERN LHC experiment
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| March 19 2025 | Stephane Willocq becomes the current Spokesperson of the ATLAS Collaboration, with Deputy Spokespersons Anna Sfyrla and Guillaume Unal. |
| July 2022 | Start of Run III at the LHC. |
| June 26 2022 | As of this date, the ATLAS experiment reported having 6,003 total members, including 3,822 physicists from 243 institutions across 40 countries. |
| 2021 | Andreas Hoecker assumes leadership as Spokesperson of the ATLAS Collaboration, leading until 2025. |
| 2020 | Roger Ruber confirmed details about the famous ATLAS detector photograph during interviews with Rebecca Smethurst from the University of Oxford, revealing the backstory of the scale image taken by Maximilien Brice. |
| 2019 | Second long shutdown (LS2) began, involving upgrades to the ATLAS detector. |
| 2018 | ATLAS conducted a precise measurement of the W boson mass, determining it as (80,370±19) MeV with an exceptional measurement uncertainty of ±2.4‰. |
| 2018 | Completion of Run II, with a recorded integrated luminosity of nearly 140 fb−1. |
| 2017 | Karl Jakobs becomes the Spokesperson of the ATLAS Collaboration, serving until 2021. |
| 2015 | ATLAS began recording collisions at 13 TeV energy, marking the start of Run II. |
| 2013 | David Charlton takes over as Spokesperson of the ATLAS Collaboration, leading until 2017. |
| 2013 | First long shutdown (LS1) of the LHC began. |
| 2012 | LHC collision energy increased to 8 TeV during Run I. |
| July 2012 | ATLAS, along with another LHC experiment, discovered the Higgs boson, a groundbreaking achievement in particle physics that confirmed a crucial prediction of the Standard Model. |
| 2010 | Start of Run I, with LHC operating at 7 TeV collision energy. |
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