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A  BACKGROUND  EVENT



A cosmic ray passing through the FD Camera can produce a geometrically and time correlated signal on several pixels. In this event, a cosmic ray generates a small shower on the bottom right of the Camera. On the left part of the Online Event Display the triggered pixels are shown in green. The black dots indicate the pixels whose FADC traces are shown on the right. The histogram presents the FADC values for each time slot (100 ns). Notice that all signals appear at the same time as expected for background cosmic radiation passing through the Camera.







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