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Thursday, July 5, 2012

HST2012, CERN - Day 5


Today we made a Cloud Chamber or Wilson Chamber.
Credit:  scifun.ed
Basically consists of a closed environment which has inside it an isopropyl alcohol 100%. 
When a charged particle (examples, an alpha or beta particle) interacts with the mixture, it will ionize it. The resulting ions act as condensation nuclei, around which will form in the mist (because the mixture is in the dew point).
This type of particle detector (used for cosmic rays) had a prominent role in particle physics experiments between 1920s and 1950s. The findings of the positron in 1932 and the kaon in 1953 were made by using this type of detectors.

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