CERN’s Gargamelle bubble chamber was 4.8 metres long by 2 metres in diameter, weighed 1,000 tonnes, and held nearly 12 cubic metres of heavy-liquid Freon. It was inaugurated on 7 May 1971 with a day of speeches, visits and lunch for the journalists and other guests. This short film, made a few months earlier, describes the design, construction and operation of the giantess.
Early results from Gargamelle provided crucial evidence for the existence of quarks, and in July 1973 the Gargamelle collaboration presented the first direct evidence of the weak neutral current. The pictures that made the tracks of particles visible as trails of bubbles, yielding these scientific results, are also extremely beautiful. The one shown dates from 1978; you can see more, and some of their interpretive sketches, here.