Word: muons
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Dates: during 1970-1979
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...billion-electron-volt proton synchrotron. Then he periodically inserted a small block of brass in the path of a beam of particles from the accelerator. The effect was predictable: whenever the metal was in the way, it slightly weakened but did not block the flow of muons to the detectors 160 yds. away. Arnold had in effect devised a simple Morse telegraph system. By appropriately timing the intervals during which the metal was in the beam, he could, for instance, send the letter V (dot-dot-dot-dash). With a more complex system, Arnold explains, a muon beam could...