XENON Dark Matter Search Experiment, experiment
The XENON Dark Matter Search Experiment is a particle detector facility under Gran Sasso that hunts for invisible matter making up the universe. A large tank filled with super-cooled liquid xenon waits for dark matter particles to collide with atoms and create light flashes and electrons that sensitive sensors can catch.
The project began in the early 2000s, growing from the tiny XENON10 detector holding 15 kilograms of xenon to today's XENONnT with over 8 tons. Each generation brought better technology and deepened our understanding of the dark matter hunt.
The experiment is named after xenon, the heavy gas used as its detection medium. The facility represents how modern science approaches complex natural phenomena through careful measurement and international collaboration.
The site sits deep underground in the Gran Sasso Laboratory in the Italian Apennines and is not usually open to the public directly. Visitors can learn more about the experiment through scientific reports, videos, and museum displays at nearby facilities.
The detector reads signals in two stages: a fast ultraviolet light flash first, then light signals from moving electrons. This double signature helps separate real particle hits from background noise. This clever method lets scientists filter out extremely rare events from thousands of ordinary interactions.
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