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<p>People,</p>
<p>Please find the minutes <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_July_2,_2019#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
<p>____</p>
<p>
</p>
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<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">HDGeant4 Meeting, July 2, 2019, </span><span
class="mw-headline" id="Minutes">Minutes</span></h1>
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lang="en">
<p>Present:
</p>
<ul>
<li> <b> CMU: </b> Naomi Jarvis</li>
<li> <b> JLab: </b> Shankar Adhikari, Alex
Austregesilo, Thomas Britton, Stuart Fegan, Mark Ito
(chair), Simon Taylor</li>
<li> <b> UConn: </b> Richard Jones</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/X2u5O/">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 went over <a
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_June_18,_2019#Minutes"
title="HDGeant4 Meeting, June 18, 2019">the minutes
from June 18</a> to remind ourselves where we left
off.
</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
open issues</a>.
</p>
<ul>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/113">Overall
BCAL energy shift? #113</a>. Mark Dalton re-did his
study, this time providing details of the dependence
of the energy response on energy and angle. Richard
noticed that the results have differences from <a
rel="nofollow" class="external text"
href="https://docs.google.com/presentation/d/1IDw4LD2GhBpzam9E1V8LRBcb49Kb1V3GMTWR2Inw2V8/edit#slide=id.p">those
he presented back in March</a>. We discussed
possible sources of the difference: target launch
position, control.in differences, and the use of
different run numbers were mentioned. In principle, it
should be possible to track down the cause of the
differences.</li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/111">Difference
in Acceptance between G3 and G4 #111</a> Thomas will
re-raise the issue with Colin Gleason when Colin
returns from vacation.</li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/109">G4Exception
crash after Curve length mis-match #109</a>. Naomi
has succeeded in tracking down two bggen events that
cause crashed in hdgeant4. We tried, in real time, to
run hdgeant4 on one of them with the random number
seeds she provided. No crash, but the input seeds
reported on standard output did not match those input.
Richard will look into this.
<ul>
<li> The connection of these events with previously
reported crashes is not certain. Naomi will post
them in as new issues.</li>
</ul>
</li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/93">Calorimeter
timing mismatch between g3 and g4 #93</a> Alex has
started work on repeating his study.</li>
</ul>
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