Revision as of 02:42, 17 February 2011

Expected results

The above Figure in EPS format :File:D Delta Qweak Error.eps

1 hour run with HWP OUT

1 hour run with HWP IN

QTOR= 6700 Amps

I_{beam} = 145 \mu A

[math]A_{raw} = 1.296 \pm 0.579[/math]= Asymmetry averaged over all Main Detectors

If I assume only having 50 \mu A then I would need to take 6 hours of data to get the same statistic as above.

If I take a week of data at 50 \muA then that would correspond to 28 runs like the above.

So the uncertainty would be reduced by [math]\sqrt{28} = 5.29[/math] The measurement would have an uncertainty of 0.579/sqrt{28} = 0.1 PPM

Dave Mack's technical note on Qweak Background contributions and propogating their error. File:Qweak Doc 965 v1.pdf

@@ Line 52: / Line 52: @@
 <math>A_{raw} = 1.296 \pm 0.579</math>= Asymmetry averaged over all Main Detectors
+If I assume only having 50 \mu A then I would need to take 6 hours of data to get the same statistic as above.
+If I take a week of data at 50 \muA then that would correspond to 28 runs like the above.
+So the uncertainty would be reduced by <math>\sqrt{28} = 5.29</math>  The measurement would have an uncertainty of 0.579/sqrt{28} = 0.1 PPM
 =background=