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<p class="MsoNormal">Hi Sean, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I posted a follow-up comment to your logbook entry. I suspect that you probably had the calorimeter-based search-region constraint enabled during your analysis and that is probably why you see very few tracks. That constraint is only appropriate
for electrons in BigBite coming from the target with magnet fully energized. It is designed to speed up the tracking analysis under beam conditions.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you set <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">bb.gem.useconstraint = 0 <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">in the database, the code will look everywhere for tracks. Having said that, some of the low-level plots look a bit screwy as far as the ADC distributions. Not clear if zero suppression is configured/working properly. Need new pedestals
and common-mode files, perhaps? <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Andrew<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Sbs_gems <sbs_gems-bounces@jlab.org> on behalf of Sean Jeffas <sj9ry@virginia.edu><br>
<b>Date: </b>Thursday, November 4, 2021 at 10:37 AM<br>
<b>To: </b>sbs_gems@jlab.org <sbs_gems@jlab.org><br>
<b>Subject: </b>[Sbs_gems] [EXTERNAL] BB cosmic results<o:p></o:p></span></p>
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<p class="MsoNormal">Hi All,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I have finished analyzing the 10M event cosmic run taken yesterday. Please see the results in the logbook, <a href="https://logbooks.jlab.org/entry/3936858">https://logbooks.jlab.org/entry/3936858</a>. Notably there seem to be barely any
tracks. Maybe the magnet incident has seriously thrown off the tracking? Perhaps Andrew could comment. But if we look at the plots without tracking we see typical ADC and strip distributions for all GEMs. The scale on some of the plots is a bit too large because
it is typically meant to show production data. However from what I see everything looks normal to me. Let me know if you want me to touch up the plots a bit, to make things more clear.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
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<p class="MsoNormal">Sean<o:p></o:p></p>
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