[Primexd] [Revised Logentry] PrimEx trigger studies

[somov at jlab.org]

Logentry Text:
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We keep on looking on the trigger performance, below are  some plots.
We'll need to check/fine tune the trigger when the beam is back.

Fig. 1 CCAL energy deposition for different trigger thresholds (CCAL trigger).

The energy is defined as a sum of fadc amplitudes from all 
channels and is given in units of adc counts

 
Fig. 2 Main production CCAL & FCAL trigger. 

Left plot: FCAL energy as a function of the CCAL energy. The 
diagonal line represents the trigger threshold on the 
global energy deposition in CCAL&FCAL

There are a few suspicious channels in the FCAL, which 
fadc amplitudes overflow (horizontal lines on the plot). 
We'll check these channels.

Right plot: Energy sum from FCAL and CCAL. The vertical line
represents the energy threshold.

Fig. 3  FCAL energy (from Fig. 2) for E_CCAL = 0. The vertical
line represents the FCAL energy threshold. 
  
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In general, trigger thresholds are relatively well reproduced.
Note, it's not a real trigger emulation (I will run it later).



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