CERN

#ThrowbackThursday to 1970 ⛄

Here we see the delivery of foggy liquid nitrogen in snowy weather. CERN's cryogenic systems cool over 1000 magnets on the Large Hadron Collider (#LHC) to temperatures close to absolute zero.

Find out more: www.home.cern/science/engi...

What does a research fellow actually do #AtCERN? 🤔

Meet Mia, a research fellow in the Systems department, contributing to ISOLDE, where scientists study the properties of atomic nuclei, with further applications in fundamental studies, astrophysics, and material and life sciences.

#WomenInScience

Today, CERN’s #PhotoOfTheWeek features a series of images captured by Corinne Longhi during the 2025 CERN Photowalk competition. #PhysPics25

📸 by Corinne Longhi

📷 credits:
1 – Photographic reproduction by Guillaume Piolle of Yellow-Red-Blue by Wassily Kandinsky, Public Domain
2 – M Breig / KIT
3 – A. Epshtein
4 – J.W. Jeoung
5– D. Nandal
6 – University of Illinois Urbana-Champaign
7 – CMS-PHO-Events-2024-005-01
8 – The Yang Family
9 – A. Nowak / CERN

D. Nandal

University of Illinois Urbana-Champaign

CMS-PHO-Events-2024-005-01

The Yang Family

From Higgs research in the #HiLumiLHC to ingenious new ways to search for the axion, explore what’s shaping the future of high-energy physics.

Read more: cerncourier.com/p/magazine/

Photographic reproduction by Guillaume Piolle of Yellow-Red-Blue by Wassily Kandinsky, Public Domain

M Breig / KIT

A. Epshtein

J.W. Jeoung

The Jan/Feb 2026 issue of the #CERNCourier is out 🚀

Did you know CERN also welcomes biomedical engineers? 🤔

Meet Francesca, biomedical engineer and PhD student #AtCERN, who works in the robotics team of the Beams department.

#WomenInScience #WomenInScience2026 #WiS2026 #IDWGS

Find out more: home.cern/news/news/en...

Precision measurements are crucial for accelerator laboratories. For collisions to occur in the #LHC, the accelerator components must be aligned with a margin of error equivalent to the thickness of a single sheet of paper. The #HiLumiLHC will require even greater precision.

This activity was part of an Interlaboratory Comparison (ILC), a process recognised by the International Organization for Standardization to ensure measurement consistency and identify potential errors or biases.

Here we see a team of surveyors from the European Spallation Source ERIC (ESS) taking precise measurements of a silicon carbide girder prototype at CERN.

Groundbreaking calorimeter for the #HiLumiLHC

The @cmsexperiment.bsky.social has recently completed the first prototype slice of its innovative High-Granularity Calorimeter (HGCAL), which will be the largest silicon-based detector ever built.

Read more: home.cern/news/news/ex...

In the image, we see the 27-km LHC eight surface points from an aerial perspective. Point 8, home of the LHCb experiment, is located close to the French town of Ferney-Voltaire.

Heating homes with the world’s largest particle accelerator

Now operational, a new heat exchange system is reusing hot water from part of the Large Hadron Collider’s cooling system to heat homes and businesses in the local area.

Read more: home.cern/news/news/ce...

#ThrowbackThursday to January 1963 ⛄

With stalactites of ice on roofs, white parking lots and snowy gardens, CERN’s main site in Meyrin, Switzerland turned into a true winter wonderland that year.

Are you spending this winter surrounded by snow?

Here, we explore various corners of the Laboratory, from CERN’s Main Workshop, the Synchrocyclotron, the #HiLumiLHC underground caverns to the SM18 test facility and the superconducting laboratory.

Around the Lab 💫

Today, CERN’s #PhotoOfTheWeek features a series of images captured by Gregory Milasseau during the 2025 CERN Photowalk competition. #PhysPics25

👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...

📸 by @gregseth

Find out more: home.cern/news/news/en...

Precision measurements are extremely important for accelerator laboratories. For collisions to take place in the #LHC, the accelerator components must be aligned with a margin of error equivalent to the thickness of a single sheet of paper. The #HiLumiLHC will require even higher precision.

European labs get aligned at CERN

Eleven laboratories came to CERN to measure the same object using their state-of-the-art equipment, in order to establish a common definition of alignment uncertainty in their measurements.

At Science Gateway, visitors have access to hands-on experiments like PIXE and instruments like ELISA to further explore the inner workings and applications of particle accelerators.

Do you want to see ELISA for yourself? Book your visit: visit.cern/

Last week we asked you to guess what this was… 🔎

Here we see the Experimental Linac for Surface Analysis (ELISA), a compact proton accelerator built for exhibition in #CERNScienceGateway – the only one that is ready for demonstrations to the public.

In the latest issue of the #CERNCourier, researchers share insights on using high-energy proton beams from the Super Proton Synchrotron to investigate meteorite material.

Find out more: home.cern/news/news/ac...

Exploring asteroids with particle beams

CERN’s #HiRadMat facility is enabling scientists to delve into the behaviour of asteroid materials under extreme conditions.

Can you guess what this is?
Hint: it’s located at #CERNScienceGateway.

We’ll share the answer on Monday.

The painstaking work helped scientists identify interesting interactions from particle collisions. The process involved meticulous, eye-straining work carried out in shifts, often in dark rooms, with the aid of projectors.

#ThrowbackThursday to February 1963 🔎

Here we see CERN’s “scanning people” using the IEP apparatus to scan and measure track-chamber photographs.

From the 1960s to the 1980s, the Laboratory relied on these experts to visually inspect enormous quantities of film produced by particle detectors.

Here, we take a visual tour through different corners of the Laboratory: the #HiLumiLHC underground caverns, the SM18 test facility, the superconducting laboratory, and CERN’s Main Workshop.

Image size has been adjusted to fit platform requirements.

Today, CERN’s #PhotoOfTheWeek features a series of images captured by Matteo Monzali during the 2025 CERN Photowalk competition. #PhysPics25

👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...

Which picture is your favourite? 😉

What can you do with 380 million Higgs bosons? – CERN Courier Valentina Cairo and Steven Lowette explore the physics reach of the High-Luminosity LHC.

Read more: cerncourier.com/a/what-can-y...

What can you do with 380 million #Higgs bosons?

What is the fate of the universe? Why is there more matter than #antimatter? What lurks beyond the #StandardModel? Valentina Cairo & Steven Lowette explore the physics reach of the High-Luminosity LHC (#HiLumiLHC) in the new issue of the #CERNCourier.