User name V. Sulkosky
Log entry time 19:57:25 on April 23, 2008
Entry number 233916
Followups:
keyword=New Helicity Historgram in ReplayI enabled the decoding of the G0 helicity in the online replay. I added
the relevant variables and histograms to the detector and physics replay.
The G0 variable is named gohel.L.helicity.
Figure 1 shows the new helicity page for the L-HRS detector. The top
plot shows the helicity for each event as decoded from the TIR (G0 mode).
Of course, the helicity is 'in-time' and the helicity is determined
directly from the helicity bit. The bottom plot shows the helicity as
plugged into an ADC channel.
There is about a 0.5% difference between the helicity as determined from
G0 decoding and the ADC decoding. I am not sure if this is a problem,
since the signal from the ADC is a bit noisy near zero as shown in
Figure 2. The MPS gate signal from the ADC is also appears a bit noisy
in Figure 3.
A copy of this log entry has been emailed to: jinhuang@jlab.org,moffit@jlab.org,rom@jlab.org,doug@jlab.org
Figure 1
Figure 2
Figure 3
