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<p>Please find the minutes <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_September_10,_2019#Minutes">here</a>
and below.</p>
<p>______________________________________________</p>
<p>
</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">HDGeant4 Meeting, September 10, 2019, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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<p>Present:
</p>
<ul>
<li> <b> CMU: </b> Naomi Jarvis</li>
<li> <b> FSU: </b> Sean Dobbs</li>
<li> <b> JLab: </b> Mark Ito (chair), Simon Taylor,
Beni Zihlmann</li>
<li> <b> UConn: </b> Richard Jones</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/xoKyc/">recording of
this meeting</a> on the BlueJeans site. Use your JLab
credentials to get access.
</p>
<h3><span class="mw-headline"
id="Review_of_minutes_from_the_last_meeting">Review of
minutes from the last meeting</span></h3>
<p>We reviewed <a
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_July_2,_2019#Minutes"
title="HDGeant4 Meeting, July 2, 2019">the minutes
from the meeting on July 2</a>. See the entry for
Issue #109 below for the discussion.
</p>
<h3><span class="mw-headline"
id="HDGeant4_and_the_Time-of-Flight_Upgrade">HDGeant4
and the Time-of-Flight Upgrade</span></h3>
<p>Sean has noticed that there are a few geometry
parameters for the TOF in HDGeant4 that have hard-wired
values. These should come from the HDDS files served by
the CCDB. Richard agreed to have a look.
</p>
<p>[Added in press: Sean created <a rel="nofollow"
class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/123">Issue
#123</a> after (during?) the meeting].
</p>
<h3><span class="mw-headline" id="DIRC_simulations">DIRC
simulations</span></h3>
<p>See the entry for Issue #121 below for discussion on
this topic.
</p>
<h3><span class="mw-headline"
id="Tracking_Efficiency_Study">Tracking Efficiency
Study</span></h3>
<p>We reviewed <a rel="nofollow" class="external text"
href="https://drive.google.com/open?id=1-lUkPE9lnPLjUHQYWR_yw6PZ75cBUxIZ">the
plots that Naomi sent to Mark</a>.
These have been shown at a previous tracking meeting.
See [[Media:NSJ_CDC_eff_simulation_21Aug2019.pdf|Naomi's
slides] for the details. We looked at the plots near the
end. They show good overall agreement between efficiency
for pions and protons over a wide kinematic region when
comparing HDG3, HDG4, and real data.
</p>
<h3><span class="mw-headline" id="Issues_on_GitHub">Issues
on GitHub</span></h3>
<p>We reviewed <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues">the
issues</a>.
</p>
<ul>
<li> Issue 123: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/123">TOF geometry
generalization</a>
<ul>
<li> Added by Sean after the meeting.</li>
</ul>
</li>
<li> Issue 121: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/121">DIRC mirror
reflectivity</a>
<ul>
<li> Yunjie Yang noticed that he was not getting
optical photons at all in HDG4 whereas he was
seeing a reasonable amount in HDG3. Justin looked
in the problem and found that "the material
properties weren't getting set for the
G4OpticalSurface in HddsG4Builder". Richard will
review the change to make sure that there are no
other relevant properties that need to be set.</li>
</ul>
</li>
<li> Issue 118: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/118">Another
segfault from G4VoxelNavigation::ComputeStep</a>
<ul>
<li> See issue 109.</li>
</ul>
</li>
<li> Issue 117: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/117">Segfault from
G4VoxelNavigation::Comp</a>
<ul>
<li> See issue 109.</li>
</ul>
</li>
<li> Issue 113: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/113">Overall BCAL
energy shift?</a>
<ul>
<li> We will ask Mark Dalton about the status of
this issue.</li>
</ul>
</li>
<li> Issue 111: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/111">Difference in
Acceptance between G3 and G4</a>
<ul>
<li> We will ask Colin Gleason about the status of
this issue.</li>
</ul>
</li>
<li> Issue 109: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/109">G4Exception
crash after Curve length mis-match</a>
<ul>
<li> Richard suspects that the problem may be due to
running multi-threaded since our single-threaded
jobs on the OSG do not crash this way. Naomi will
put together instructions on how she is running
hdgeant4 and Richard will try to reproduce the
crash at UConn. Naomi will also check that she
still observes the crash at CMU.</li>
</ul>
</li>
<li> Issue 107: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/107">Feature
request - progress indicator</a>
<ul>
<li> On Richard's list of things to do.</li>
</ul>
</li>
<li> Issue 105: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/105">Reading in #
events and source</a>
<ul>
<li> On Richard's list of things to do.</li>
</ul>
</li>
<li> Issue 102: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/102">Terminal
cleanup?</a>
<ul>
<li> On Richard's list of things to do.</li>
</ul>
</li>
<li> Issue 93: <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/93">Calorimeter
timing mismatch between g3 and g4</a>
<ul>
<li> We will ask Alex Austregesilo about the status
of this issue.</li>
</ul>
</li>
</ul>
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