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User name V. Sulkosky
Log entry time 12:34:54 on February 09, 2009
Entry number 260019
keyword=Helicity from HRSFigure 1 shows the two copies of the helicity plugged into two separate ADC
channels in ROC 4. I also plotted the MPG gate. The helicity low and
high signals are well separated in ADC channels, so this is not the problem
with the ADC helicity. The two ADC copies are also well correlated with
each other.
The second figure shows the comparison between ADC helicity and the TIR
helicity from the TS. Run 1184 was a test run from this morning taking
during the Moller measurement. The two helicities disagree about 50% of
the time. For run 20125, the last HRS only run taken yesterday shows what
we normally see that the ADC and TIR agree with a less than 0.2%
discrepancy.
The copy of the helicity plugged into BigBite ADCs agrees with the TIR
from the left HRS TS.
A copy of this log entry has been emailed to: rom,brads,moffit,kalyan
Helicity Comparison from ADCs on Left HRS
Left HRS Helicity Comparison TIR and ADC
