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The Highest Energy Cosmic Rays I Propagation and Detection

Explore the two main techniques for cosmic ray detection: ground particle showers and air fluorescence, with insights on electromagnetic particle absorption, muon energy distribution, and energy deposition. Learn from experts like M. Hillas and Miguel Mostafa in this comprehensive overview.

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The Highest Energy Cosmic Rays I Propagation and Detection

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  1. The Highest Energy Cosmic Rays I Propagation and Detection XXXIV ITEP Winter School of Physics Nucl Phys B (Proc Suppl) 138 (2005) 465-491 James W. Cronin Moscow, February 25

  2. Two techniques: • detect shower particles on the ground • detect air fluorescence produced by shower particles

  3. M Hillas 1984

  4. proton + cmb ->  + nucleon 3

  5. Assume E-2.5 spectrum

  6. Beyond 1500 gm/cm2 electromagnetic particles absorbed. (Highly inclined showers)

  7. 90 % of particles within Moliere radius of ≤ 100 m

  8. Note: total energy carried by muons ≤ 10%

  9. Energy deposit in 1.2 meters of water

  10. At 1000 meters from core

  11. Go to black board

  12. Two techniques: • detect shower particles on the ground • detect air fluorescence produced by shower particles

  13. A “perfect” hybrid event: few are as beautiful as this one ! Miguel Mostafa New Mexico/Utah

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