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Wilson cloud chamber

radiation detector

Quick Summary

The Wilson cloud chamber, invented by Scottish physicist C.T.R. Wilson, is a type of radiation detector. It works by using a supersaturated vapor that condenses into tiny liquid droplets around ions. These ions are created when energetic charged particles pass through the chamber.

The supersaturation in a Wilson cloud chamber is achieved by rapidly expanding the saturated vapor, which causes it to cool. This process must be repeated for each use. The trails of condensed droplets reveal the paths of particles like alpha particles, beta particles, or protons. This invention was crucial for studying radioactivity, X rays, and cosmic rays, and it eventually led to the development of the bubble chamber.

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