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Figure 6: Flow diagram for double-flagging of events shown via the data stream captured by
the photodiode and the events on-chip. The process is initiated upon upwards crossing of the
debris threshold value. The time difference to a previous event is checked. If a previous event
is too close, both events get flagged as non-sortable (red flag). If the distance is above the
distance threshold, the first event gets sorted (green flag), whereas the following event only
gets pre-flagged for sorting (orange flag). Upon downwards crossing of the fluorescent
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