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SCOAP3 at ten: from open access to open science
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(Image: CERN) A flagship CERN open science programme – the Sponsoring Consortium for Open Access Publishing in Particle Physics (SCOAP3) – celebrated its tenth anniversary in 2024. It is a one-of-a-kind partnership between CERN and more than 3000 libraries, funding bodies, research institutes...
on Dec 11
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ALICE finds first ever evidence of the antimatter partner of hyperhelium-4
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Illustration of the production of antihyperhelium-4 (a bound state of two antiprotons, an antineutron and an antilambda) in lead–lead collisions. (Image: Janik Ditzel for the ALICE collaboration) Collisions between heavy ions at the Large Hadron Collider (LHC) create quark–gluon plasma, a hot...
on Dec 9
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CLOUD experiment resolves puzzle of new aerosol particles in upper troposphere
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In a paper published today in the journal Nature, the CLOUD collaboration at CERN reveals a new source of atmospheric aerosol particles that could help scientists to refine climate models. Aerosols are microscopic particles suspended in the atmosphere that arise from both natural sources and...
on Dec 6
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CERN signs long-term solar power agreements
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Solar power will cover 10% of CERN’s annual electricity consumption from 2027, thanks to three power purchase agreements (PPAs) signed by CERN and French energy providers. Electricity accounts for about 95% of CERN’s energy use and, under normal circumstances, is procured entirely from France....
on Dec 5
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CERN’s colossal complex of accelerators is in the midst of a two-year shutdown for upgrade work. But that doesn’t mean all experiments at the Laboratory have ceased to operate. The CLOUD experiment, for example, has just started a data run that will last until the end of November. The CLOUD...
on Dec 1
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Accelerator Report: The excellent 2024 LHC run ended abruptly
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The 2024 LHC run was outstanding in every respect, achieving record-breaking performance in both the proton and the lead-ion runs. For the proton run, the overall machine availability was excellent, reaching 72.1%, with a record 53.6% of the time spent in collisions. The integrated luminosity...
on Nov 29
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Migrating to open-source technologies
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Update: The name of the project was changed to Microservice Architecture on Libre Technology (MALT) to better reflect its scope. More information in this article. ________ The Microsoft Alternatives project (MAlt) started a year ago to mitigate anticipated software license fee increases....
on Nov 29
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Record data for the LHC in 2024
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The particles completed a final lap of honour around the LHC on 23 November, bringing the 2024 run of the Large Hadron Collider (LHC) to a close. The LHC performed beautifully in its tenth year of operation. During the proton run, which began on 25 April and ended on 16 October, an exceptional...
on Nov 25
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CMS develops new AI algorithm to detect anomalies
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In the quest to uncover the fundamental particles and forces of nature, one of the critical challenges facing high-energy experiments at the Large Hadron Collider (LHC) is ensuring the quality of the vast amounts of data collected. To do this, data quality monitoring systems are in place for the...
on Nov 19
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CERN70: From physics to medicine
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Ugo Amaldi helped create a European network of cancer therapy centres using beams of ions, in particular carbon ions
on Nov 15
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Accelerator Report: Lead ions at the heart of the accelerator complex
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The scheduled four-week lead-ion physics run began at the SPS North Area on 4 November and has since been progressing smoothly, with outstanding machine availability. The SPS super cycle containing two lead-ion cycles destined for the SPS North Area experiments. The white line represents the...
on Nov 15
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Heavy-ion run at the LHC begins
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The Large Hadron Collider (LHC) is like an immensely powerful kitchen, designed to cook up some of the rarest and hottest recipes in the Universe, like the quark–gluon plasma, a state of matter known to have existed shortly after the Big Bang. While the LHC mostly collides protons, once a year...
on Nov 11
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Heavy-ion run at the LHC begins
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The Large Hadron Collider (LHC) is like an immensely powerful kitchen, designed to cook up some of the rarest and hottest recipes in the Universe, like the quark–gluon plasma, a state of matter known to have existed shortly after the Big Bang. While the LHC mostly collides protons, once a year...
on Nov 11
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Three-year MALT project comes to a close
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At the end of 2021, the three-year MALT project, working to rationalise the provision of software licences at CERN, ended. The important lessons learned from this project will now be applied across all related activities at the Organization. Like most large organisations, CERN makes use of...
on Nov 10
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Heavy-ion run at the LHC begins today
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The Large Hadron Collider (LHC) is like an immensely powerful kitchen, designed to cook up some of the rarest and hottest recipes in the Universe, like the quark–gluon plasma, a state of matter known to have existed shortly after the Big Bang. While the LHC mostly collides protons, once a year...
on Nov 6
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CERN Council selects Mark Thomson as next Director-General, starting in 2026
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Today, the CERN Council selected British physicist Mark Thomson as the Organization’s next Director-General. The appointment will be formalised at the December session of the Council and Professor Thomson’s five-year mandate will begin on 1 January 2026. “Congratulations to Professor Mark...
on Nov 6
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BASE experiment takes a big step towards portable antimatter
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Antimatter might sound like something out of science fiction, but at the CERN Antiproton Decelerator (AD), scientists produce and trap antiprotons every day. The BASE experiment can even contain them for more than a year—an impressive feat considering that antimatter and matter annihilate upon...
on Oct 28
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Updated schedule for CERN’s accelerators
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In the September CERN Council Session, we presented a revised schedule for Long Shutdown 3 (LS3) of the Large Hadron Collider (LHC) and its injector complex. This new schedule includes a delayed start and an increased duration for LS3. LS3 for the LHC is now scheduled to begin at the start of...
on Oct 21
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CERN teams up with Luxembourg and the World Food Programme to tackle global hunger
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A new partnership funded by the Government of Luxembourg, the United Nations World Food Programme (WFP), the Luxembourg Institute of Science and Technology (LIST) and CERN aims to use expertise in AI technology to address the issue of global hunger. The two-year strategic partnership will...
on Oct 19
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Accelerator Report: Ending the 2024 LHC proton run on a high note
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This year’s LHC proton run, which has seen protons colliding at an energy of 6.8 TeV, ended on 16 October, surpassing expectations with 11% more collisions than planned. Next up: a four-day machine development (MD) block, before the LHC gears up for its final run of the year, the lead-ion run,...
on Oct 18
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Accelerator Report: Target reached, but compressor off
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In the last report, I highlighted that the LHC had successfully delivered 100 fb⁻¹ of integrated luminosity to ATLAS and CMS by 13 September 2024. Only ten days later, on 23 September, an additional 10 fb⁻¹ was integrated, reaching the 110 fb⁻¹ target set for 2024. A static VAR compensator (not...
on Oct 4
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NA62 experiment at CERN observes ultra-rare particle decay
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Geneva, 25 September 2024. At a seminar held at CERN this week, the NA62 collaboration reported the unequivocal confirmation of the ultra-rare decay of a positively charged kaon into a positively charged pion and a neutrino–antineutrino pair. Experiments including NA62 have previously measured...
on Sep 25
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CERN Council decides to conclude cooperation with Russia and Belarus in 2024
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Following a decision taken by the CERN Council today, the Organization’s cooperation with the Russian Federation and the Republic of Belarus will conclude at the expiry in 2024 of the International Cooperation Agreements (ICAs) with the two countries. This decision was taken following the...
on Sep 20
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LHC experiments at CERN observe quantum entanglement at the highest energy yet
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Quantum entanglement is a fascinating feature of quantum physics – the theory of the very small. If two particles are quantum-entangled, the state of one particle is tied to that of the other, no matter how far apart the particles are. This mind-bending phenomenon, which has no analogue in...
on Sep 18
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CMS experiment at CERN weighs in on the W boson mass
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The CMS experiment at CERN is the latest to weigh in on the mass of the W boson – an elementary particle that, along with the Z boson, mediates the weak force, which is responsible for a form of radioactivity and initiates the nuclear fusion reaction that powers the Sun. At a seminar held at...
on Sep 17
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How CERN IT keeps up with the data deluge
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The new Prévessin Data Centre at CERN. (Image: CERN) At CERN, we are used to dealing with a deluge of data, but the numerical value behind the word “deluge” has significantly evolved over the years. Today, the average amount of collision data recorded on disk by the LHC experiments is a little...
on Sep 4
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CERN welcomes Estonia as its 24th Member State
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Geneva, 30 August 2024. Today, CERN is welcoming Estonia as its 24th Member State, marking the end of the formal application process that started in 2018 and crowning a period of cooperation that stretches back three decades. “Estonia is delighted to join CERN as a full Member because CERN...
on Aug 30
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Breakthrough in rapid cooling for BASE antiprotons
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To study antimatter particles, experiments must cool them to the lowest possible temperatures. The BASE experiment has just reached a new milestone in this regard. In an article published by the journal Physical Review Letters, the collaboration presents a new device that reduces the time...
on Aug 14
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CERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centres for scientific research. Its business is fundamental physics, finding out what the Universe is made of and how it works.
on Jul 18
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Le Bureau du CERN pour la science ouverte : mode d’emploi
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Pourquoi devrais-je m’intéresser à la science ouverte ? La science ouverte vise à rendre la recherche plus accessible, plus transparente et plus efficace, tant pour les scientifiques que pour la société dans son ensemble. Si elle implique de rendre disponibles au public les produits de la...
on Jul 16
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How can I use CERN’s Open Science Office?
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Why should I care about open science? The aim of open science is to make scientific research more accessible, transparent and efficient for the benefit of scientists and society. It includes making the products of research openly available – i.e. providing open access to research publications...
on Jul 11
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During LS2, the LHC’s two external beam dumps were removed from the tunnel and replaced with spare ones. After ten years of operation, they were showing signs of degradation, notably nitrogen leaks. Before being installed, the spare dumps were modified and upgraded to prevent the same problems...
on Jul 6
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New beam dumps: cut along the dotted line
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When particle beams circulating in the LHC need to be stopped, they are directed towards the beam dumps. In 2020, during Long Shutdown 2, the main LHC beam dumps, which had been in place in the accelerator from the start, were replaced by spare dumps – themselves heavily modified with respect to...
on Jul 6
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Less hungry magnets for the experiments of the future
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How can we advance cutting-edge research but consume less energy? CERN’s scientists are working on innovative solutions, and superconductivity is one of the key ingredients. A team has recently successfully tested a demonstrator magnet coil that will significantly reduce the power consumption...
on Jul 5
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CERN Data Centre passes the 200-petabyte milestone
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On 29 June 2017, the CERN DC passed the milestone of 200 petabytes of data permanently archived in its tape libraries. Where do these data come from? Particles collide in the Large Hadron Collider (LHC) detectors approximately 1 billion times per second, generating about one petabyte of...
on Jul 2
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Probing matter–antimatter asymmetry with AI
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The open CMS detector during the second long shutdown of CERN’s accelerator complex. (Image: CERN) When we look at ourselves in a mirror, we see a virtual twin, identical in every detail except with left and right inverted. In particle physics, a transformation in which charge–parity (CP)...
on May 8
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The next-generation triggers for CERN detectors
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The experiments at the Large Hadron Collider (LHC) require high-performance event-selection systems – known as “triggers” in particle physics – to filter the flow of data to manageable levels. The triggers pick events with distinguishing characteristics, such as interactions or collisions of...
on Apr 11
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CERN pays tribute to Peter Higgs
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Peter Higgs has passed away at the age of 94. An iconic figure in modern science, Higgs in 1964 postulated the existence of the eponymous Higgs boson. Its discovery at CERN in 2012 was the crowning achievement of the Standard Model (SM) of particle physics – a remarkable theory which explains...
on Apr 10
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Accelerator Report: Protons or Easter eggs? Let’s hope for both
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Beam commissioning is progressing well across the entire accelerator complex, with initial completion achieved in the first machines of the chain. Last week, the first physics experiments started in the East Area, behind the PS, and others will follow suit shortly. A...
on Apr 6
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Large Hadron Collider reaches its first stable beams in 2024
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On Friday 5 April, at 6.25 p.m., the LHC Engineer-in-Charge at the CERN Control Centre (CCC) announced that stable beams were back in the Large Hadron Collider, marking the official start of the 2024 physics data-taking season. The third year of LHC Run 3 promises six months of 13.6 TeV proton...
on Apr 5
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FASER measures high-energy neutrino interaction strength
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Operating at CERN’s Large Hadron Collider (LHC) since 2022, the FASER experiment is designed to search for extremely weakly interacting particles. Such particles are predicted by many theories beyond the Standard Model that are attempting to solve outstanding problems in physics such as the...
on Apr 4
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CERN to change name for 70th Anniversary
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Since its inception in 1954, CERN has grown from a small group of physicists from a handful of countries to a thriving international hub for science and technology. This is why, on the occasion of the Laboratory’s 70th Anniversary, the time has come for the name to be adapted to reflect its new...
on Apr 1
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Sécurité informatique : ouverture du pare-feu du CERN
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Grâce à une analyse en cours des vulnérabilités liées à la présence du CERN sur internet, menée par une société spécialisée externe, l'équipe de sécurité informatique du Laboratoire s’apprête à effectuer des tests de pénétration contre certaines cibles visibles sur la Toile. Le CERN envisage en...
on Mar 26
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Brazil becomes Associate Member State of CERN
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Brazil has become the first Associate Member State of CERN in the Americas, following official notification that the country has completed its internal approval procedures in respect of the agreement signed in March 2022 granting it that status and of the Protocol on Privileges and Immunities of...
on Mar 22
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Accelerator Report: Beams are circulating in the LHC
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The LHC fixed display, just after both beams entered into circulation. The blue and red lines represent the number of protons in beams 1 and 2, respectively. The black line represents the energy of the beams. It is flat because the beams had not yet been accelerated at this point. (Image: CERN)...
on Mar 14
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CERN and the not-for-profit organization OAPEN Foundation are happy to announce a further expansion of their collaboration to jointly promote open access to books. Since 2021, CERN and the OAPEN Foundation have collaborated to disseminate books that are made available in open access through...
on Mar 6
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AEgIS makes positronium for antimatter gravity experiments
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The universe is almost devoid of antimatter, and physicists haven’t yet figured out why. Discovering any slight difference between the behaviour of antimatter and matter in Earth’s gravitational field could shed light on this question. Positronium atoms, which consist of an electron and a...
on Mar 1
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LHCb experiment releases all of its Run 1 proton–proton data
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At the end of December 2023, the LHCb experiment released all its data from Run 1 of the Large Hadron Collider. This data, collected by the experiment in 2011 and 2012, contains approximately 800 terabytes of information obtained from proton–proton collisions. The data has been made available in...
on Jan 22
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A year to celebrate CERN’s 70th anniversary
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CERN wishes you a happy 2024 as we look forward to a year of celebrations for CERN’s 70th anniversary Happy 2024 from CERN! In 2024, CERN is celebrating its 70th anniversary. Throughout the year, events and activities will showcase the Laboratory’s rich past, as well as its bright future with a...
on Jan 20