Cloud Chamber
| Also Known As | Wilson cloud chamber, expansion cloud chamber, diffusion cloud chamber |
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What is Cloud Chamber?
A cloud chamber is a particle detector consisting of a sealed container with a supersaturated vapour of water or alcohol. When charged particles (such as alpha or beta particles) pass through, they ionise the vapour and create visible condensation trails. Invented by C.T.R. Wilson, cloud chambers were crucial in early nuclear physics research.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A cloud chamber is a particle detector consisting of a sealed container with a supersaturated vapour of water or alcohol. When charged particles (such as alpha or beta particles) pass through, they ionise the vapour and create visible condensation trails. Invented by C.T.R. Wilson, cloud chambers were crucial in early nuclear physics research.
Cloud chambers were used to discover the positron (Anderson, 1932), to study cosmic rays, and to visualise nuclear reactions. Modern versions are used as educational demonstrations and in nuclear physics research. They have been largely superseded by bubble chambers and wire chambers.
Cloud chambers using alcohol vapour (isopropanol or ethanol) present flammability hazards. Dry ice (CO₂) used for cooling can cause cryogenic burns. Radioactive sources used in demonstrations require appropriate licensing and handling procedures.