However, a bubble chamber is sensitive to particles passing ... these displays could even be manipulated in 3D. Proton-antiproton collisions seen in the UA1 detector at CERN, 1983.

The chamber is cooled to cryogenic temperatures (6 K), where cryo-pumping produces a vacuum good enough to reach antiproton storage times of more than 1.2 years 20. Figure 2: Experiment sequence ...