User name Xiaohui
Log entry time 13:57:22 on May20,2008
Entry number 238965
keyword=Clarification on TDC variablesJust for record. The variable DL.bit[] is the timing for T3, Ndata.DL.bit3 is the number of hits per event. DL.bit[Ndata.DL.bit3] is the timing for first hit(mostly elastic). By only seeing the spectrum of the first hit, the TDC spectrum makes sense. If there is no selection on the hit, the multiple hits in front of the coin. peak are more than the hits behind the coin. peak, which may indicate that there is some reflection of the T3 trigger. Kalyan saw this reflection when he was down in the hall this morning. But this won't affect our data.
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