Particle accelerator interior cern

Inside the Large Hadron Collider (LHC) at CERN, the world's largest and most powerful particle accelerator, located on the border between France and Switzerland.

About this subject

The Large Hadron Collider (LHC) is CERN's flagship particle accelerator, operated by the European Organization for Nuclear Research. Commissioned in 2008, the LHC lies in a 27-kilometer circular tunnel about 100 meters underground. It accelerates protons to near-light speeds and smashes them together to study the fundamental constituents of matter.

One of its most celebrated achievements was the discovery of the Higgs boson in 2012, confirming the mechanism that gives particles mass. The LHC also probes dark matter, extra dimensions, and the conditions of the early Universe just after the Big Bang. To operate, its superconducting magnets are cooled to -271.3 °C, colder than outer space.

Interestingly, CERN offers free guided tours, but access to the LHC tunnel is limited to specific days, usually during technical shutdowns. Around 12,000 scientists from over 100 countries work on LHC experiments. Billions of collisions occur every second, generating data processed by a global computing grid.

Frequently Asked Questions

What is CERN?

CERN is the European Organization for Nuclear Research, based in Geneva. It is the world's largest particle physics laboratory, operating the Large Hadron Collider (LHC).

What is the purpose of a particle accelerator?

To accelerate charged particles (like protons) to extremely high speeds and make them collide, allowing scientists to study the structure of matter and fundamental forces of nature.

Can I visit the LHC?

Yes, CERN offers free guided tours, but access to the LHC tunnel is restricted. During technical shutdowns, special visits can be arranged to see the interior of the accelerator.