The Sudbury Neutrino Observatory (SNO), a 1000 ton heavy water
Cherenkov detector under
construction in INCO's Creighton mine near Sudbury, Ontario (Canada)
with matter are extremely rare, so detecting a neutrino is very hard.
Neutrino detectors are typically large, underground tanks filled with a
fluid that reacts to neutrinos. In neutrino detection, bigger is better! The bigger the tank (detector), the more neutrinos it will detect.
One example of a neutrino detector is the Super-Kamionkande in Japan.
Here's a piece of trivia for you:
early neutrino detectors were filled with a type of cleaning fluid!
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