2 m Bubble Chamber (CERN)

The 2m Bubble Chamber was a device used in conjunction with CERN's 25 GeV Proton Synchrotron (PS) machine to study high-energy physics.

It was decided to build this chamber in 1958 with a large team of physicists, engineers, technicians and designers led by Charles Peyrou [de].

[3] This chamber was devoted to the study of interaction mechanisms of high-energy particles and the investigation of the properties of their excited states.

The bubble chamber was filled with 1150 litres of liquid hydrogen and was expanded by a piston placed at the top.

The chamber had vertical windows, a magnet made up of copper coils which generated a field of 1.7 T and the whole apparatus weighted more than 700 tons.

Main body of the 2 m Bubble Chamber at CERN
The 2m Bubble Chamber undergoing a series of modifications during the PS shutdown.