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<p>Simulation Fans,</p>
<p>Please find the minutes below and by clicking <a
moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_October_9,_2018#Minutes">here</a>.</p>
<p> -- Mark</p>
<p>____________________________</p>
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<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Minutes, HDGeant4 Meeting, October 9, 2018</span></h1>
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lang="en">
<p>Present:
</p>
<ul>
<li> <b> FSU: </b> Sean Dobbs</li>
<li> <b> JLab: </b> Mark Ito (chair), Justin Stevens,
Beni Zihlmann</li>
</ul>
<p>We reviewed the following webpages:
</p>
<ol>
<li> <a
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_September_11,_2018#Minutes"
title="HDGeant4 Meeting, September 11, 2018">Review
of minutes from the September 11 HDGeant4 Meeting</a></li>
<li> <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_September_18,_2018#Review_of_the_HDGeant4_Meeting_from_September_11"
title="GlueX Offline Meeting, September 18, 2018">Discussion
at the September 11 Offline Software Meeting</a></li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues">Issues
on GitHub</a></li>
</ol>
<ul>
<li> The geometry comparison described in (1) was done
by Thomas Britton and Mark. The XML files from HDDS
and from CCDB were identical.</li>
<li> The mystery of recovery of FDC hits in the
transition from wire-based to time-based tracking
reported by Beni in (2) remains. HDG3 sees the
recovery, HDG4 does not. The mystery of events with no
FDC hits visible when scanning HDG4 events also
remains.</li>
<li> We need to check that studies we use going forward
have Simon Taylor's tracking changes from <a
rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_recon/pull/21">Pull
Request #21</a>, merged on September 11.</li>
<li> Sean submitted <a rel="nofollow" class="external
text"
href="https://github.com/JeffersonLab/HDGeant4/issues/67">Issue
#67</a> on the photon energy scale. Richard Jones
will look into this using a single photon gun.</li>
<li> We will talk to Thomas about further studies to
uncover the root source of the loss of FDC hits
described in <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/66">Issue #66</a>.
The goal is to describe the problems at a stage before
tracking.</li>
</ul>
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<pre class="moz-signature" cols="72">--
Mark Ito, <a class="moz-txt-link-abbreviated" href="mailto:marki@jlab.org">marki@jlab.org</a>, (757)269-5295
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