[Frost] Moeller measurements for g9a

[Michael Dugger]

Hi,

It looks like there are potential problems with some of the Moeller 
measurements.

Run 55544:
We have 4 measurements taken over a 14 minute time period with
P = 85.228 +/- 1.42
P = -78.523 +/- 1.35
P = -79.150 +/- 1.26
P = 88.700 +/- 1.48

There is a large change between the polarization values (> 10%). The Two 
negative measurements are much lower than is typical and I want to take 
these out of the average. Is there a reason not to remove these negative 
measurements?

Run 55552:
We have 2 measurements:
P = 84.167 +/- 1.33
P = -84.725 +/- 1.53

The first measurement had True Rates = 0.00 and Accidental Rates = 0.00, 
also the SLM Current = 0.125 (whereas most all other runs had SLM 
Current ~ 6). The second measurement had True Rates = 1002.00 and 
Accidental Rates = 3.50, with SLM Current = 1.192. (Typically the True 
Rate is about 6000). Moreover, 2C21 X = 0.0 (-4.455) and 2C21 Y = 0.0 
(1.560) for the first (second) measurement.  I think that the Moeller 
measurements for run 55552 are highly suspect and should be thrown out of 
the determination of the polarization average.

Additional question: How important are the 2C21 X and Y values for the 
Moeller measurement?

Take care,
Michael