DRIFT I dark matter detector

Image number: DRIFT-vs2

DRIFT I dark matter detector

DRIFT I was built by UK and US scientists to search for ‘dark matter’. This invisible matter, thought to make up around 23% of the universe, is known to exist because of its gravitational effects on ordinary matter in stars, galaxies and planets.

Scientists think that dark matter is most likely to be previously unknown particles. DRIFT I ran between 2001 and 2004, 1.1 kilometres underground in Yorkshire’s Boulby Mine. It did not detect dark-matter particles, but its powerful successors continue the search.

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Science Museum/Science & Society Picture Library
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