Here we see two new collimators developed at CERN for #HiLumiLHC, the successor to CERN’s flagship accelerator Collimators are movable blocks made of materials designed to absorb particles. Shaped like jaws, they close tightly around the beam to clean up particles that stray from their ideal path

CERN accelerates medical applications 🩻 Five-year extensions to CERN’s CLEAR and MEDICIS platforms will boost the impact of cutting-edge accelerator technologies in areas ranging from advanced medical treatments to aerospace electronics. Find out more: home.cern/news/news/ac...

The first high-energy collisions between light nuclei at the Large Hadron Collider confirm the unusual “bowling-pin” shape of neon nuclei and offer up a new tool to study the extreme state of matter produced in the aftermath of the #BigBang. Find out more: home.cern/news/news/ph...

CERN’s #PhotoOfTheWeek features a collection of pictures taken by Cedric Favero during the CERN Photowalk 2025 competition held earlier this summer. Here we see: 1 - 2: The #HiLumiLHC underground galleries

CERN and Fusion for Energy sign a major framework collaboration agreement to advance scientific research and technological development in areas of common interest. Find out more: home.cern/news/news/knowledge-sharing/cern-and-fusion-energy-advancing-together

Join us at #CERNScienceGateway on 25 September for an exclusive preview screening of the documentary “Les vrais chercheurs ne savent pas ce qu’ils cherchent…” – “Real researchers don’t know what they’re looking for”. Register here: indico.cern.ch/event/1577730/

Accelerator in Action ⚡ Here we see the Experimental Linac for Surface Analysis (ELISA) in operation. Find out more: home.cern/news/news/kn...

CMS deepens our understanding of the early #universe by studying the first ever oxygen-oxygen and neon-neon collisions at the #LHC! With the effort of the whole group, results from these unique collisions are already being shared at major conferences. Read more here 👉 cms.cern/news/cms-ini...

CERN’s #PhotoOfTheWeek features a collection of images taken by Agis Petropoulos, captured during the CERN Photowalk 2025 competition held earlier this summer. These photos provide a glimpse into various parts of the Laboratory, including the underground #HiLumiLHC caverns.

Welcome to the September/October edition of #CERNCourier In this edition the future meets the past: the ongoing update to the European Strategy for Particle Physics, the outstanding discoveries of 1964, what may be the last chapter of the quarkonia story and much more. Read more: cerncourier.com

CERN launches Generation Higgs, its new cultural season, with Cédric Klapisch on 25 September With Generation Higgs, CERN honours the young minds already shaping today’s scientific landscape Find out more: home.cern/news/news/ce...

Here we see the TWOCRYST experimental setup at the #LHC. This innovative experimental concept aims to measure the properties of charm baryons using a fixed target and two bent crystals.

This #ThrowbackThursday we take a look at CERN’s participation, in collaboration with the Niels Bohr Institute, at @Smukfest – a music festival held last month in Denmark. 📸 Orlando Prugel-Benett

ISOLDE investigates island of inversion 🔎 An experiment carried out at CERN’s ISOLDE facility has determined the western shore of a small island of atomic nuclei, where conventional nuclear rules break down. Find out more: home.cern/news/news/ph...

This #PhotoOfTheWeek features the newly built #HiLumiLHC galleries at CERN’s Point 1. The #HiLumiLHC will be the successor of CERN’s LHC, due to start after 2030. It will deliver a higher number of particle collisions to the experiments, thus increasing the chances of new observations.

Here we see the new firefighting robot belonging to the CERN Fire and Rescue Service (CFRS). This robot allows CFRS to gain operational experience and prepare new firefighting solutions for current and future accelerator facilities.

One week left until registration closes for #OSFair2025. From 15 to 17 September, @cern.bsky.social will host a global gathering of innovators, researchers, and policy leaders to co-create the future of Open Science. 🔗Secure your spot today: www.opensciencefair.eu/registration... #OpenAIRE #CERN

#ThrowbackThursday to 1976 🎥 Here we see Georges-Henri Martin, Chief-Editor of La Tribune de Genève – a local news outlet from Switzerland – interviewing CERN’s Director General at that time, John Adams, during a break at a meeting in the Main Building (Image 1) #AtCERN.

Students step up to the I.FAST innovation challenge 💪 International participants of the fourth I.FAST Challenge Based Innovation event were praised for their innovative proposals to find novel medical solutions using particle accelerator technology. Find out more: home.cern/news/news/kn...

The summer I was… wandering the immeasurable 🌀 Today’s #PhotoOfTheWeek features one of the most recognisable visit points #AtCERN – the steel sculpture in front of the Globe of Science and Innovation.

#CERN and Pro Helvetia extend “Connect” collaboration and launch Connect Argentina residency 💫 Find out more: home.cern/news/news/cern/cern-and-pro-helvetia-extend-connect-collaboration-and-launch-connect-argentina

Here we see the transport and installation of the second CERN-made inner triplet cryomagnet – also known as Q2b – in the #HiLumiLHC IT String earlier this year. Q2b consists of an MQXFB magnet (produced by CERN) and an MCBXF corrector magnet (produced by CIEMAT, Spain).

Welcome to the superconductor lab ⚙️ This #PhotoOfTheWeek features Building 163, where scientists develop and characterise superconducting cables for the particle accelerators of today and tomorrow. 📸by Erik Kuna 1️⃣“A Magnetic Focus” 2️⃣ “Threading the Future”

Here we see the so-called cold powering system, designed for the #HiLumiLHC and assembled and qualified #AtCERN earlier this summer.

#ThrowbackThurdsday to June 1980 🏃‍♂️ That summer, Leon Van Hove (CERN’s Director General at that time) kicked off the traditional annual relay race, a tradition that still takes place to this day #AtCERN.

#ThrowbackThursday to 1995 ✨ Here we see one of the six hodoscopes, made of 48 scintillator counters, used in the NA50 experiment. #DidYouKnow: hodoscopes are instruments used in particle detectors, to determine the particle’s trajectories.

When theatre and physics collide 🎭🧑‍🔬 "Collision(s)", a play exploring the meeting of a playwright and a CERN particle physicist, was performed at the “Avignon Off” Festival on 18 July, offering a deep dive into the interactions between poets and scientists.

CERN summer nights, mid-July 🎸 This #PhotoOfTheWeek brings you to the Hardronic Music Festival, which took place #AtCERN earlier this month. The Hardronic Music Festival was created in 1989 by Silvano de Gennaro and has been taking place for the last three decades.

Quantum simulators in high-energy physics 💫 Here we see: 1️⃣Quantum simulator at the University of Innsbruck (📸C. Lackner/Innsbruck) 2️⃣Neutral atom experiment at Standford University (📸Standford/Choi Research Group) 3️⃣Vacuum chamber of a trapped-ion quantum computer (📸E. Brucke/PSI)

#ThrowbackThursday to the construction of water canals in the 70s At the time, CERN’s Laboratory II was the site of numerous experiments and accelerator construction projects.

A quantum leap for antimatter measurements The demonstration of first antimatter quantum bit paves the way for substantially improved tests of nature’s fundamental symmetries. 📸 Physicist Barbara Latacz working in the BASE experiment. Find out more: home.cern/news/news/ph...

Today’s #PhotoOfTheWeek gives a nod to last week’s event STELLAR, where, together with astronauts, @nobelprize.bsky.social winners and other world-class scientists, we discovered how astrophysics and particle physics are shaping the future.

🏆 CERN’s CAFEIN™ has won the Innovate for Impact in Healthcare Award at the #AIforGood Summit CAFEIN™, developed at CERN, is an AI-driven infrastructure and framework designed for federated, sustainable, and privacy-preserving algorithm training.

ATTRACT celebrates successes at final conference The initiative helped develop breakthrough detection and imaging technologies and tested a model for innovation in Europe. Find out more: home.cern/news/news/kn...

Threading the beam at the #LHC 📈 These are not knitting patterns, but rather Van der Meer scans done at the Large Hadron Collider. We do wonder what they would look like knitted… 🤔 Curious to know what they represent?

Here we see a klystron, an electronic component used to amplify high-frequency radio waves by a factor of up to a million. In particle colliders, they can be used to power radiofrequency cavities and thus play a key role in accelerating particles.

A science festival #AtCERN🌌☄️ Join us this Saturday, 19 July, at 16:00 CEST for STELLAR, your chance to explore space from CERN. Watch live: www.youtube.com/watch?v=dAFv...

Arts at CERN residents in Copenhagen 🎨 The exhibition "Soft Robots" at Copenhagen Contemporary features artworks developed in collaboration with CERN’s scientific community as part of Arts at CERN’s Collide residency programme.

The winners of the CERN Photowalk 2025 🏆 CERN has announced the 3 winners and 18 runners-up of the CERN Photowalk 2025, a behind-the-scenes photo competition, which received 165 submissions. Find out more and browse the original pictures: home.cern/news/news/ce...

#ThrowbackThursday to the summer of 1982 🧑‍🏫 Here we see physicist John Bell, known for his theorem on the foundations of quantum mechanics – which he worked on #AtCERN – laying the groundwork for the now-vibrant field of quantum information.

A new piece in the matter–antimatter puzzle The #LHCb experiment at CERN has revealed a fundamental asymmetry in the behaviour of particles called baryons. The paper, originally released on 21 March 2025, has been published today in the journal @nature.com. Read more: home.cern/news/press-r...

The #OSFair2025 programme is taking shape & it’s full of bold ideas, key voices, and inspiring sessions! Explore the full schedule now on our official event site 👉 www.opensciencefair.eu/2025/programme Let the countdown to Geneva begin! #OpenScience #CERN @openaire.bsky.social @cern.bsky.social

Oxygen and neon collisions at the LHC for the first time ever 🚀 On 1 July, the four large #LHC experiments recorded particle collisions between oxygen and proton beams for the first time ever. Last week, they went a step further with oxygen-oxygen and neon-neon collisions.

📢 EARLY BIRDS for #OSFair2025 CLOSE tomorrow, 15 July! Don’t miss out! Join leading voices in #OpenScience at the #CERN Science Gateway in Geneva, from 15 to 17 September. 👉 Explore the programme: shorturl.at/4hxGf 👉 Register now: shorturl.at/BW9as @openaire.bsky.social @cern.bsky.social

Exploring the invisible universe 🌌 #DidYouKnow that the first Moon landing took place nearly 56 years ago?

Here we see engineers working on the High-Luminosity LHC Inner–Triplet (IT) String test stand. The #HiLumiLHC will be the successor to CERN’s Large Hadron Collider, due to start in early 2030.

Welcome to a very #quantum edition of CERN Courier 💫 In this July/August edition marking the anniversary of quantum mechanics, the #CERNCourier shows that a century has not sufficed to understand or apply the theory fully. Read more: cerncourier.com/p/magazine

Summertime #nostalgia 🌞 This #ThrowbackThursday, we take a look at some summer moments #AtCERN from the past decades: 1️⃣ Engineers calculating outdoors due to overheating barracks during a heatwave (1970) 2️⃣ A Fiat 500 parked inside one of CERN’s buildings (1960)

100 years of #quantum mechanics #OnThisDay in 1925, in a letter to Wolfgang Pauli, Werner Heisenberg revealed his new ideas, which were to revolutionise physics. Read more: home.cern/news/news/ph...

Students from Belgium, Canada, Mexico, Türkiye and the USA win the 12th edition of Beamline for Schools Five teams of secondary school pupils have been selected to carry out their own experiments using accelerator beams at CERN, DESY and the ‪University of Bonn