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<p>Folks,</p>
<p>Please find the minutes <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_December_15,_2020#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
<p>_______________________________________</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">HDGeant4 Meeting, December 15, 2020, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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lang="en">
<p>Present: Alex Austregesilo, Tegan Beattie, Sean Dobbs,
Colin Gleason, Mark Ito (chair), Igal Jaegle, Naomi
Jarvis, Richard Jones, Zisis Papandreou, Simon Taylor,
Jon Zarling, Beni Zihlmann
</p>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/q72zOCXZeeh/">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 the minutes from December 1st. Zisis made
a correction to the version of the minutes sent out via
email: Tegan and Colleen Henschel were the ones that
wrote the Geant4-based detailed simulation of the BCAL.
</p>
<h3><span class="mw-headline" id="Issues_on_GitHub">Issues
on GitHub</span></h3>
<p><a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/167">Issue
#167: G4 exceptions for certain run numbers</a>: Colin
is working through reviving his study. Tegan is on
contact with Colin to get going himself.
</p>
<p><a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/179">Issue
#179: Proton timing in the BCAL</a>: Sean posted a new
issue, looking deeper into the details of the BCAL
simulation of incident hadrons. He led us through the
issue. Some points from the discussion:
</p>
<ul>
<li> He looked at abundance of the various secondary
particles in the simulation for hdgeant, HADR1 and
HADR4, and HDGeant4.</li>
<li> He looked at the energy spectra for particular
particle types: neutrons, protons, and C12 for each of
the three models.</li>
<li> Zisis asked about the physics list. Richard replied
that it was a standard list with tweaks from Maurizio
Ungaro of Hall B and from a BNL experiment.</li>
</ul>
<h3><span class="mw-headline" id="Technical_Topics">Technical
Topics</span></h3>
<ul>
<li> Igal has reported a problem with doing a make after
a make clean in HDGeant4. Mark is look at this.</li>
<li> In response to questions and discussion, Mark will
build a version of no-light-heavy branch of HDGeant4
at JLab for the (i)farm. He will also send out
instructions on how that is done.</li>
</ul>
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