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...
30.01.2026 09:20 — 👍 80 🔁 14 💬 2 📌 0
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...
29.01.2026 10:14 — 👍 1094 🔁 219 💬 35 📌 45
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.
27.01.2026 14:00 — 👍 16 🔁 1 💬 1 📌 0
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.
27.01.2026 14:00 — 👍 428 🔁 48 💬 17 📌 3
Welcome | visit.cern
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/
26.01.2026 07:09 — 👍 12 🔁 1 💬 0 📌 0
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.
26.01.2026 07:09 — 👍 33 🔁 3 💬 2 📌 2
Exploring asteroids with particle beams
CERN’s #HiRadMat facility is enabling scientists to delve into the behaviour of asteroid materials under extreme conditions.
23.01.2026 13:18 — 👍 32 🔁 3 💬 1 📌 0
Can you guess what this is?
Hint: it’s located at #CERNScienceGateway.
We’ll share the answer on Monday.
23.01.2026 08:00 — 👍 23 🔁 3 💬 7 📌 0
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.
22.01.2026 08:03 — 👍 10 🔁 0 💬 0 📌 0
#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.
22.01.2026 08:03 — 👍 28 🔁 0 💬 1 📌 1
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.
20.01.2026 13:07 — 👍 22 🔁 6 💬 2 📌 2
#FunFact: in the coming months, all 72 trays will be delivered from the four assembly centres at Peking University, the University of Milano-Bicocca, the University of Virginia and Caltech.
19.01.2026 08:23 — 👍 12 🔁 0 💬 2 📌 0
BTL is a new precision timing detector that uses scintillating crystals to measure particle arrival times with picosecond precision (30–40 ps). The detector is composed of 72 segments, known as trays, which will be progressively integrated into the full detector at CERN.
19.01.2026 08:23 — 👍 12 🔁 0 💬 1 📌 0
The CMS Barrel Timing Layer (BTL) is a crucial component of the @cmsexperiment.bsky.social detector upgrade for the #HiLumiLHC – the successor to CERN’s Large Hadron Collider.
Here we see the first tray, assembled at Peking University, which arrived at CERN in September last year.
19.01.2026 08:23 — 👍 25 🔁 3 💬 3 📌 1
Photowalk | Interactions
The winners are, in order:
“Dark” by Marc Goodwin, first place.
“Hands that Build the Future” by Cedric Favero, second place.
“Threading the Future” by Erik Kuna, third place, voted by the CERN community.
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
16.01.2026 11:00 — 👍 8 🔁 0 💬 0 📌 0
Photowalk | Interactions
🏆The three winning pictures have been submitted to the Global Physics Photowalk competition, together with submissions from laboratories all around the world. #PhysPic25
16.01.2026 11:00 — 👍 7 🔁 0 💬 2 📌 0
Eliane was a central and influential figure in CERN’s early history, serving from the Laboratory’s founding years as the Director-General’s trusted executive assistant.
She made major contributions to the Organisation’s operations, international relations, and public image during those early days.
15.01.2026 08:20 — 👍 14 🔁 0 💬 0 📌 0
#ThrowbackThursday to the winter of 1977 💫
Here we see Eliane de Modzelewska with her colleagues, finalising gifts for retiring Council members, Wolfgang Gentner and Jan Hendrik Bannier.
#FunFact: the gifts were made from pieces of glass that once formed part of a bubble chamber window.
15.01.2026 08:20 — 👍 17 🔁 4 💬 2 📌 0
Advancing cancer therapy with next-generation radionuclides
The PRISMAP programme, coordinated by CERN, has provided 159 radionuclide batches for cancer research over the past five years.
14.01.2026 12:02 — 👍 42 🔁 8 💬 2 📌 0
