What happens at CERN? Roger Barlow Manchester University.
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Transcript of What happens at CERN? Roger Barlow Manchester University.
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What happens at CERN?
Roger Barlow
Manchester University
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The smaller the detail
The bigger the apparatus
Letters
~1/5 mm
Details of print
~1/50 mmIndividual paper fibres ~1/500 mm
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The World’s biggest Microscope
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CERN
A co-operative European effort – sharing costs between many countries
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Digging out a cavern
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The final pillar
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Tunnel – completed
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LHC
A machine for colliding protons at very high energies
v=0.99999998 c
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What happens?
• Protons collide with other protons
• Energies high enough to make new particles
• Particles stream out of the collision and analysed by detectors
• Results are recorded electronically and stored on disk for later analysis
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The ATLAS detector
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ATLAS in reality
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Part of another detector (OPAL)
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The DELPHI detector
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What we see
Proton hits proton and makes lots of stuff
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Towards the New Periodic Table(?)
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So finally
• Particle Physics is still a live subject. New discoveries are made. Textbooks go out of date. We understand things better.
• CERN is where it’s happening. For Europe and the world
• CERN is important for physicists and for taxpayers
• Visiting CERN is a great experience.