15:12 11 September 2012
The ever-shifting nature of neutrinos is the missing piece of the particle physics puzzle. Here, we look at the heavyweight technology studying these elusive particles. Valerie Jamieson
Read more: "Neutrinos – the next big small thing"
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The Sudbury Neutrino Observatory is located over 2 kilometres underground in a nickel mine in Ontario, Canada. Like Super-Kamiokande, its deep underground location shields it from cosmic rays. Before being turned off in 2006, the SNO vessel was filled with 1000 tonnes of heavy water, and spotted neutrinos in a similar way to Super-Kamiokande. SNO specialised in spotting neutrinos coming from the sun. Plans are under way to upgrade the experiment.
(Image: Photo courtesy of SNO)