| Trigger How1 #722794 Algorithms used to decide in real time if an event should be recorded. A trigger system combines several successive levels, which exploit data recorded by the detector in an increasingly extensive way. The first level uses a small number of essential, immediately available parameters; at the last level less events are analysed, which allows the algorithm to "take its time" and base its decision on a comprehensive reading of the detector. The whole process takes a fraction of a second. |
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