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<u><b>James:</b></u> Prepared an (updated)analysis run list. <br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Good_Runs_for_Analysis">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Good_Runs_for_Analysis</a><br>
<br>
Started looking at A_1 and A_2, working with Jon. <br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/A1%2C_A2_and_Structure_Functions#Update_to_A1.2C_A2">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/A1%2C_A2_and_Structure_Functions#Update_to_A1.2C_A2</a><br>
<br>
A_1 seems to be twice the size it's supposed to be. This might be from
the coefficients (code-wise). Will check calculations. Preparing tables
to get F_1 and R (via F1F209) for the physics asymmetries.<br>
<br>
<br>
<u><b>Anusha:</b></u> Comparing data/MC for Carbon runs with and
without Helium with B-field in both parallel and perpendicular.
Applying slow-raster x and y offsets and using to calibrate beam
positions offsets. <br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/C_runs_with_Parallel_Field_ON">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/C_runs_with_Parallel_Field_ON</a><br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/C_runs_with_Perp._Field_ON">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/C_runs_with_Perp._Field_ON</a><br>
<br>
Will try applying azimuthal corrections to perpendicular data. The
data/MC comparisons she's getting are inconsistent with those seen for
the packing fractions, especially regarding the out of plane angle
(xptar) for the perp data. <br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Packing_Fractions_Tables">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Packing_Fractions_Tables</a><br>
<br>
Her, Hoyoung, and Narbe coordinate a systematic comparison to find
where this is coming from.<br>
<br>
<br>
<u><b>Whit:</b></u> Doing a study of the efficiency and (pion)
rejection) of the detectors. <br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Whit#Efficiency_and_Rejection">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Whit#Efficiency_and_Rejection</a><br>
For the plots; black curves are for pions, red curves for leptons.<br>
<br>
There might be a bug in the code, causing a double/triple counting. <br>
<br>
Has GEANT4 MC set up to compile on batch farm. Will work on getting
database connection setup.<br>
<br>
<br>
<u><b>Hoyoung (05/19/11):</b></u> Working on getting system dead-time.
Calculating coefficients for scaler, which are consistent with what
Oscar gets for the unpolarized runs. Applied this to some NH3 runs.
This is using the 2second timing. Will try using the (cumulative)
numbers for entire runs and look at parallel data, which has the data
asymmetry dominating. <br>
Wrote a model for system dead-time, which gives the probability for a
(200us) dead-time.<br>
<a class="moz-txt-link-freetext" href="http://www.jlab.org/~hykang/deadtime/20110519/">http://www.jlab.org/~hykang/deadtime/20110519/</a><br>
<br>
Mark and Oscar suggested looking into what is done for dead-time
corrections in parity violation experiments.<br>
<br>
<br>
As always, please let me know if I missed anything or if I made any
mistake(s).<br>
<br>
Next meeting will be May 25th 3:30pm JLab time.<br>
<br>
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