A simplified version of this device was developed in 1950 by Cowan, Needels, and Nielsen.
A simplified version of this device was developed in 1950 by Cowan, Needels, and Nielsen. They used a row of felt strips soaked in alcohol to achieve supersaturation, cooling the lower part of the chamber with solid carbon dioxide. FTP, identify this device, whose diffusion type superseded the earlier expansion model, which was a chamber containing air and ethanol vapor, invented in 1911 by C.T.R. Wilson, used to make the paths of particles of ionizing radiation visible.
A simplified version of this device was developed in 1950 by Cowan, Needels, and Nielsen.
the {cloud chamber}