Cosmic Ray Air Shower Pictures
by H.-J. Drescher

Air showers are cascades of secondary particles induced in the atmosphere by high energy cosmic rays. What you see here is a visualisation of realistic simulations of these showers. Of course, not all of the particles in a shower are displayed, there are far too many! The fraction displayed here is about 1e-6, sampled with a thinning algorithm. At a distance beyond some 100 meters from the shower axis, thinning is not applied any more. This way you can see decays or electron-positron creation.
Each square on the ground is one square kilometer.
new layout

orange: protons
gray: mesons
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Feel free to take these pictures and show them in your talks, but don't forget to cite me ;-)