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noun, Physics.
an apparatus for determining the movements of charged particles, consisting of a chamber containing a supersaturated mixture of gas and vapor, the vapor condensing around ions created by the particle in its passing, thereby revealing the path of the particle.
(physics) an apparatus for detecting high-energy particles by observing their tracks through a chamber containing a supersaturated vapour. Each particle ionizes molecules along its path and small droplets condense on them to produce a visible track Also called Wilson cloud chamber
cloud chamber
A device used to observe the movements of charged atomic and subatomic particles, such as ions, electrons, or muons. Cloud chambers consist of a closed container filled with a gas that is on the verge of condensing. Charged particles passing through the gas ionize the atoms in their path, forming visible lines of condensation. Compare bubble chamber.


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