Elementary a collaboration: .

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CERN in the classroom: cloud chambers Elementary a collaboration: http://CERNandScotland.tumblr.com

Transcript of Elementary a collaboration: .

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CERN in the classroom:cloud chambers

Elementarya collaboration:

http://CERNandScotland.tumblr.com

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SEPnet

Particle Physics: the ‘building blocks’

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–70ºC

+12ºCisopropyl alcohol (volatile)

falls in high temperature gradient

layer of supersaturatedvapour forms

Cloud chamberinvented 1911 by Scottish physicist CTR Wilson

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–70ºC

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high-energy particle goes through

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strips electrons from gasmolecules as it passes

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–70ºC

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ions nucleate liquid drops in the supersaturated gas

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–70ºC

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the droplets reflect light and we can see the particle’s track

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Safety!1. isopropyl alcohol2. dry ice

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positron1933

After the atom: a new particle 1933

Physical Review 54 (6) 491–494 (1933)

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The discovery of the antiproton and other antimatter, 1955-59

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Glasgow electron microscope Stanford linear accelerator (1960)

Stanford linear accelerator (1960)

Controlled environment and higher energies: accelerators

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The Large Hadron Collider

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The ATLAS experiment– reconstruct particle tracks

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From cloud chambers to Higgs at the LHC

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http://CERNandScotland.tumblr.com