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'Gargamelle' was a giant particle detector at CERN, designed mostly for the detection of neutrinos. With a diameter of nearly 2 meter and 4.8 meter in length, Gargamelle was a bubble chamber that held nearly 12 cubic meters of freon (CF₃Br). It operated from 1970 to 1978 at the CERN PS and SPS.
The name derives from the giantess 'Gargamelle' in the works of Rabelais; she was Gargantua's mother.