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Cosmic ray muons reach the detector with varying amounts of energy and deposit that energy in the counter. Some are trapped in the counter and eventually decay into an electron, a neutrino and an anti-neutrino. These three new particles zoom away (to conserve the momentum of the stopped muon).
Click to see an animation.
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| Each counter is connected via a channel to the DAQ. The channel that seeks decays looks for a light signal (the incoming muon) and then waits. When the counter later detects the electron's signal within a certain time window, we know the amount of time between the muon stopping and decaying. |
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