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Hi,</div>
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We’ve been discussing this global ECAL timing shift issue during the JEF meetings </div>
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for quite some time. The ECAL timing needs to be adjusted according to the Geant </div>
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reference, but it hasn’t been updated between the monitoring launches. </div>
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<br>
</div>
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Bhesha has been looking at the ECAL monitoring plots for different monitoring launches, </div>
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I’ve CC’d him here.</div>
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<br>
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Cheers,</div>
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Sasha</div>
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<br>
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<b>From:</b> Halld-physics <halld-physics-bounces@jlab.org> on behalf of Sean Dobbs via Halld-physics <halld-physics@jlab.org><br>
<b>Sent:</b> Wednesday, November 26, 2025 10:28 AM<br>
<b>To:</b> Simon Taylor <staylor@jlab.org><br>
<b>Cc:</b> halld-physics@jlab.org Physics <halld-physics@jlab.org><br>
<b>Subject:</b> Re: [Halld-physics] Monitoring Launch 2025-01 ver13</div>
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<div style="direction: ltr;">Hi Beni,</div>
<div style="direction: ltr;"><br>
</div>
<div style="direction: ltr;">Thanks for checking this out. The ECAL offsets were corrected after this monitoring launch and some spot checks show good alignment after that. So the next monitoring launch should show better results. Hopefully the effects that
Simon is looking at will be smaller scale. </div>
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</div>
<div style="direction: ltr;">Cheers</div>
<div style="direction: ltr;">Sean</div>
<div><br>
</div>
<div style="direction: ltr;">On Wed, Nov 26, 2025 at 10:25 AM Simon Taylor via Halld-physics <<a class="OWAAutoLink" id="OWAbbb183d4-cef2-5845-fc70-a3342302b7b1" href="mailto:halld-physics@jlab.org">halld-physics@jlab.org</a>> wrote:</div>
<blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left: 1px solid rgb(204, 204, 204);">
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Hi, all. </div>
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I am working on the ECAL library to see if I can find issues with the shower timing. Based on the recent change to HDGeant4 I already need to add a light propagation correction to the reconstruction.</div>
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Simon</div>
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<b>From:</b> Halld-physics <<a class="OWAAutoLink" id="OWA560bbdb3-e678-6dbd-d147-e3a7fbf1eb4f" href="mailto:halld-physics-bounces@jlab.org">halld-physics-bounces@jlab.org</a>> on behalf of zihlmann via Halld-physics <<a class="OWAAutoLink" id="OWAe1087e97-d84a-0872-e8fc-aff069cc2ae1" href="mailto:halld-physics@jlab.org">halld-physics@jlab.org</a>><br>
<b>Sent:</b> Wednesday, November 26, 2025 10:05 AM<br>
<b>To:</b> <a class="OWAAutoLink" id="OWA883caaf4-7605-facf-910a-19eeb72a115c" href="mailto:halld-physics@jlab.org">halld-physics@jlab.org</a> <<a class="OWAAutoLink" id="OWA6f59a09a-645a-c8b6-c72c-641afac46f79" href="mailto:halld-physics@jlab.org">halld-physics@jlab.org</a>><br>
<b>Subject:</b> Re: [Halld-physics] Monitoring Launch 2025-01 ver13</div>
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</div>
<div style="direction: ltr;"><span style="font-size: 13px;">On more issue that Simon pointed out to me. <br>
The ECAL timing is way off for all runs. It is around 6.6ns<br>
this is so far off that it barely fits into the monitoring histogram.<br>
I looked at two separate histograms and both yield the same result<br>
of a big offset:<br>
"HLDetectorTiming/Physics Triggers/TRACKING/ECAL - RF Time<br>
and:<br>
Independent/Hist_Neutrals/ECALNeutralShowerDeltaTVsE<br>
<br>
At this point I have no idea why the ECAL is so off.<br>
<br>
Beni<br>
</span><br>
</div>
<div style="direction: ltr;">On 11/26/25 08:37, zihlmann wrote:</div>
<blockquote>
<div style="direction: ltr;"><span style="font-size: 13px;">Hi All,<br>
there are two runs where something did not go as planed.<br>
132705 and 133564, both these runs have hardly any statistics in the root files (at least the histogram<br>
I was looking at). However, both these runs are are over 1h long and have plenty of triggers.<br>
<br>
cheers,<br>
Beni<br>
</span><br>
</div>
<div style="direction: ltr;">On 11/8/25 13:13, Alexander Austregesilo via Halld-physics wrote:</div>
<blockquote>
<p style="direction: ltr; margin-top: 1em; margin-bottom: 1em;">Dear Colleagues,<br>
<br>
We completed another full monitoring launch for the 2025-01 GlueX-II data set. We successfully reconstructed 5 files for all 1197 runs with the RCDB query "@is_dirc_production and status!=0", for the first time with the correct material maps.</p>
<p style="direction: ltr; margin-top: 1em; margin-bottom: 1em;">The usual monitoring plots can be found on the new PlotBrowser page:</p>
<p style="direction: ltr; margin-top: 1em; margin-bottom: 1em;"><a data-auth="NotApplicable" style="margin-top: 0px; margin-bottom: 0px;" class="OWAAutoLink" id="x_m_-3116460040956957281OWA9acaa0f1-3d06-d848-1aed-605fa7518406" href="https://halldweb.jlab.org/PlotGrader/browser_dev.html?minRunNum=131593&maxRunNum=133606&RunPeriod=RunPeriod-2025-01&Version=mon_ver12">https://halldweb.jlab.org/PlotGrader/browser_dev.html?minRunNum=131593&maxRunNum=133606&RunPeriod=RunPeriod-2025-01&Version=mon_ver13</a></p>
<p style="direction: ltr; margin-top: 1em; margin-bottom: 1em;">All merged histogram files can be found on the work disk at:<br>
<i>/work/halld/data_monitoring/RunPeriod-2025-01/mon_ver13/rootfiles/</i><br>
<br>
The REST files, trigger skims and several root trees, including PART trees for pi0, rho, omega and KLambda, are saved on cache:<br>
<i>/cache/halld/offline_monitoring/RunPeriod-2025-01/ver13/</i><br>
<br>
Best regards,<br>
<br>
Alex</p>
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<pre><div style="direction: ltr;">--
Alexander Austregesilo
Staff Scientist - Experimental Nuclear Physics
Thomas Jefferson National Accelerator Facility
Newport News, VA
<a class="OWAAutoLink" id="x_m_-3116460040956957281OWAde497116-6457-0382-047d-12956e1e852b" href="mailto:aaustreg@jlab.org">aaustreg@jlab.org</a>
(757) 269-6982</div></pre>
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