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CERN in the classroom: cloud chambers

CERN in the classroom: cloud chambers. Elementary. a collaboration:. http:// CERNandScotland.tumblr.com. Particle Physics: the ‘building blocks’. SEPnet. Cloud chamber. invented 1911 by Scottish physicist CTR Wilson. +12ºC. isopropyl alcohol (volatile).

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CERN in the classroom: cloud chambers

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

  2. Particle Physics: the ‘building blocks’ SEPnet

  3. Cloud chamber invented 1911 by Scottish physicist CTR Wilson +12ºC isopropyl alcohol (volatile) falls in high temperature gradient layer of supersaturated vapour forms –70ºC

  4. +12ºC high-energy particle goes through –70ºC

  5. +12ºC + – strips electrons from gas molecules as it passes – + + – – + – + + – –70ºC

  6. +12ºC ions nucleate liquid drops in the supersaturated gas –70ºC

  7. +12ºC the droplets reflect light and we can see the particle’s track –70ºC

  8. Safety! isopropyl alcohol dry ice

  9. After the atom: a new particle 1933 positron 1933 Physical Review 54 (6) 491–494 (1933)

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

  11. Controlled environment and higher energies: accelerators Stanford linear accelerator (1960) Glasgow electron microscope Stanford linear accelerator (1960)

  12. The Large Hadron Collider

  13. The ATLAS experiment – reconstruct particle tracks

  14. From cloud chambers to Higgs at the LHC

  15. http://CERNandScotland.tumblr.com

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