You can use the sea as a neutrino detector

Casting a net for neutrinos

km3net_deploymentLike ordinary telescopes, KM3NeT operates in darkness—but there the resemblance ends. The Km3 Neutrino Telescope (where km3 means a cubic kilometer) is a suite of detectors that sits at the pitch-black bottom of the Mediterranean Sea, 3.5 kilometers below the waves and strong currents of the surface.

KM3NeT needs this absolute night to see the faint amount of light from ghostly neutrinos striking water molecules. Neutrinos pass through most material as though it weren’t there, which is why detectors need to be so big to spot them—more volume means more chances to see a neutrino interact. When completed, KM3NeT will be the largest neutrino detector in the world, made of about 1.3 trillion gallons of seawater. Continue reading You can use the sea as a neutrino detector

Building a Massive Neutrino Hunter Beneath the Mediterranean

The second-biggest structure in human history will seek to answer deep cosmic mysteries

KM3NeT Artist's Concept A possible configuration of the KM3NeT detector network.

Neutrinos may or may not move faster than light, but regardless, they’re special little things. They speed through the planet, and through you, and through everything; but, chargeless and puny, they interact with their surroundings so minimally that other particles hardly take notice.
These subatomic particles are so tiny and so imperturbable they’re almost impossible to see, but they originate in some of the most violent and disruptive processes in the universe. Energetic neutrinos that originate in deep space, known as astrophysical neutrinos, escape from the dark centers of the universe’s most powerful places — gamma ray bursts, blazars and quasars, and black holes at the centers of galaxies. They can serve as cosmic messengers from these tumultuous places, but first we have to find them, and this is excruciatingly difficult. So European scientists are planning to construct the second-largest structure ever built by humanity, just to look for them…..
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