User name R. Michaels
Log entry time 14:36:50 on May28,2004
Entry number 123561
keyword=T7 efficiency, aerogel thresholdsMy own analysis of T7 efficiency is that it is 90 +/- 10 %.
Sorry I don't have it better than 10% yet. But even if it is 80%
I think it is worth running this way, and keep a good amount of
the unbiased T5 to sort out the efficiency later.
There are 2 ingredients in this trigger: thresholds and timing.
We assume the timing is not screwed up (unluckily that was a problem
in January). To examine the quality of Aerogel threshold cut and
seperate this from the timing issue, it is helpful to use the TDCs
from A1-sum and A2-sum which have the exact same signal as what
feeds into the trigger logic. A hit in this TDC means you have a
signal above threshold. No hit means it is below threshold. Fig 1
shows A1 sum and A2 sum for requirement of TDC or no TDC.
The TDCs are:
A1sum roc3 slot 4 chan 78
A2sum roc3 slot 4 chan 79
FIGURE 1
