Victor Hess in his balloon (1912)

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Victor Hess in his balloon (1912)
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Cosmic Rays Produce Muons in the Atmosphere.
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(No Transcript)
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Types of Cosmic Ray DetectorsScintillator,
Water, Array
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Cosmic Ray Detectors Around the WorldPierre
Auger, Haverah Park, SPASE, Quarknet
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Radiation Energy
Photon of lightCan be detected by your eye 1 eV
Ultra Violet ray from sunEnough to burn your skin 10 eV
X-RayCan pass right through your body 1000 eV 1 keV
Gamma raydetected by the Whipple group's telescope 1012 eV 1 TeV
Cosmic Raydetected by the SPASE-2 experiment 1015 eV 1 PeV
Cosmic Raydetected by the planned Pierre Auger Observatory 1020 eV 100 EeV
Highest energy Cosmic Ray ever recorded 3x1020 eVThis is the amount of energy that you would feel if you dropped a bowling ball on your foot from a height of 1 metre!


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Primary Cosmic Ray Particle Types

• Charged particles such as protons or helium
  nuclei
• Uncharged particles such as photons

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Are Active Galactic Nuclei a Source of the
Highest Energy Cosmic Rays? (NGC 4261)
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The Quarknet Scintillation Detector
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Finding the Muon Lifetime