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Record #00034Technology archive

World's Largest Particle Accelerator

CERN states that the Large Hadron Collider is the world's largest and most powerful particle accelerator, consisting of a 27-kilometre ring of superconducting magnets.

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Last updated
2026-09-24
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Current Record

27km

Current record value

Holder
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Location
Near Geneva on the Franco-Swiss border, about 100 m underground · Satellite view · Google Maps · ·
Start date
2008-09-10
Record status
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Overview

Archive Note

The LHC first started up on 10 September 2008 and is the latest addition to CERN's accelerator complex.

It occupies a 27-kilometre tunnel about 100 metres underground, using superconducting magnets to accelerate protons or ions to near the speed of light.

In July 2012 the ATLAS and CMS experiments at the LHC announced the discovery of the Higgs boson.

Key information

Ring circumference
27 km
First start-up
10 September 2008
Operated by
CERN
Location
Near Geneva on the Franco-Swiss border, about 100 m underground

Record history

1 Milestones
  1. 2008-09-1027 kmLarge Hadron ColliderNear Geneva on the Franco-Swiss border, about 100 m undergroundCurrent Record

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Evidence & References

Verification basis and limitations

Verified

The record conclusion has sufficient verification support.

Verification explanation pending

Last editorial review
2026-09-24

Current Entry identifies the current entry in this archive; it does not establish that the record is still held today.

Source IDSourcePublisherLink
SRC-001The Large Hadron ColliderOfficialENRecord topic / Current recordCERN

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Large Hadron Collider
CERN
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