[Halld-offline] HDGeant4 Meeting, December 18, 2018

[Mark Ito]

Folks,

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_December_18,_2018#Minutes> 
and below.

   -- Mark

________________________________________


    HDGeant4 Meeting, December 18, 2018, Minutes

Present:

  * *CMU: * Naomi Jarvis
  * *JLab: * Alex Austregesilo, Thomas Britton, Mark Ito (chair), Simon
    Taylor
  * *UConn: * Richard Jones

There is a recording of this meeting <https://bluejeans.com/s/cIQKJ/> on 
the BlueJeans site. Use your JLab credentials.


      Review of minutes from last time

We went over the minutes from December 4 
<https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_December_4,_2018#Minutes>. 


Mark has complete a system for building the GlueX software on Oasis, 
usable from a Singularity container, with all of the pieces needed for 
code development. Look for an announcement from him soon.


      Issues on GitHub

We looked at the list of issues 
<https://github.com/JeffersonLab/HDGeant4/issues>. The only one we 
needed to discuss was Issue #66, "More FDC issues? 
<https://github.com/JeffersonLab/HDGeant4/issues/66>.

Richard has been looking at FDC hits on forward track, trying to 
understand losses. He turns of physics (multiple scattering, energy 
loss, etc.) and is exploring where hits are missed on tracks in this 
simple scenario. He is starting with hdgeant3 for these studies. He 
finds discrepancies in the drift times "read-out" in the Monte Carlo vs. 
the thrown distances of closest approach to the wires. The cathodes look 
OK.

He has come to conclusion that he has to go ahead and start looking 
inside the tracking to understand this problem.

Mark mentioned there is a possibility of an inconsistency between the 
geometry in hdgeant3, coming from XML files on disk indirectly through 
FORTRAN code, and the geometry used by reconstruction, coming from XML 
files stored in the CCDB. Richard will think about how to check 
consistency automatically.

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  * This page was last modified on 18 December 2018, at 16:20.

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