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<p>Dear Richard,</p>
<p>I attached the tree to this mail. Besides fit parameters and run
numbers, it has a leaf for the orientation which is 0/45/90/135 or
-777 for the amorphous runs.</p>
<p>I also added the runs together according to the 7 run block
defined here:<br>
</p>
<p><a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki-private/index.php/Spring_2018_Dataset_Summary">https://halldweb.jlab.org/wiki-private/index.php/Spring_2018_Dataset_Summary</a></p>
<p>The plots in the attached pdf file shows the extracted PSigma
value as a function of run number. The width of the bands
corresponds to the uncertainty in PSigma<br>
</p>
<p>Unfortunately, the amount or the quality of the data does not
allow me to observe a clear change in the shape of the
polarization as a function of energy.<br>
</p>
<p>Best regards,</p>
<p>Alex<br>
</p>
<br>
<div class="moz-cite-prefix">On 06/24/2018 02:46 PM, Richard Jones
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABfxa3RE4xWB+s29qXD7h45cEfS=t29GN7GkYo=5hfaLwJeoGw@mail.gmail.com">
<div dir="ltr">Alex,
<div><br>
</div>
<div>These data are valuable in trying to understand how drifts
in the diamond edge sharpness factor into our physics
performance. Is it possible to get these fit result data in
the form of a tree? Just the fit parameters and their errors
as a function of run number would be great, if possible.</div>
<div><br>
</div>
<div>thank you,</div>
<div>-Richard</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Sat, Jun 23, 2018 at 12:32 PM Alexander
Austregesilo <<a href="mailto:aaustreg@jlab.org"
moz-do-not-send="true">aaustreg@jlab.org</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Dear
colleagues,<br>
<br>
I used the first offline monitoring launch over the full
2018-01 data to <br>
extract the rho beam asymmetry for beam energies between 8.2
and 8.8 GeV.<br>
<br>
The PSigma values extracted for 0/90 and 45/135 are
consistent within <br>
0.3% (absolute). You can find the fits to the full data sample
in the <br>
attachment (rho_fit.pdf).<br>
<br>
I also looked at the individual orientations as a function of
run number <br>
(rho_run_PSigma.pdf). No visible degradation of the
polarization can be <br>
seen with the current precision. I will try to group several
runs <br>
together and look at the polarization as a function of energy
to obtain <br>
a better handle on this.<br>
<br>
The third plot shows the extracted orientation angle as a
function of <br>
run number (rho_run_psi0.pdf). The offsets from the nominal
orientation <br>
are in the order of 5% and seem to be quite stable during the
run. In <br>
addition, all assignments from RCDB (colors) look correct.<br>
<br>
Best regards,<br>
<br>
Alex<br>
<br>
</blockquote>
</div>
</blockquote>
<br>
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