[Halld-offline] HDGeant4 Meeting Minutes, September 10, 2019

[Mark Ito]

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_September_10,_2019#Minutes> 
and below.

______________________________________________


    HDGeant4 Meeting, September 10, 2019, Minutes

Present:

  * *CMU: * Naomi Jarvis
  * *FSU: * Sean Dobbs
  * *JLab: * Mark Ito (chair), Simon Taylor, Beni Zihlmann
  * *UConn: * Richard Jones

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


      Review of minutes from the last meeting

We reviewed the minutes from the meeting on July 2 
<https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_July_2,_2019#Minutes>. 
See the entry for Issue #109 below for the discussion.


      HDGeant4 and the Time-of-Flight Upgrade

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.

[Added in press: Sean created Issue #123 
<https://github.com/JeffersonLab/HDGeant4/issues/123> after (during?) 
the meeting].


      DIRC simulations

See the entry for Issue #121 below for discussion on this topic.


      Tracking Efficiency Study

We reviewed the plots that Naomi sent to Mark 
<https://drive.google.com/open?id=1-lUkPE9lnPLjUHQYWR_yw6PZ75cBUxIZ>. 
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.


      Issues on GitHub

We reviewed the issues <https://github.com/JeffersonLab/HDGeant4/issues>.

  * Issue 123: TOF geometry generalization
    <https://github.com/JeffersonLab/HDGeant4/issues/123>
      o Added by Sean after the meeting.
  * Issue 121: DIRC mirror reflectivity
    <https://github.com/JeffersonLab/HDGeant4/issues/121>
      o 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.
  * Issue 118: Another segfault from G4VoxelNavigation::ComputeStep
    <https://github.com/JeffersonLab/HDGeant4/issues/118>
      o See issue 109.
  * Issue 117: Segfault from G4VoxelNavigation::Comp
    <https://github.com/JeffersonLab/HDGeant4/issues/117>
      o See issue 109.
  * Issue 113: Overall BCAL energy shift?
    <https://github.com/JeffersonLab/HDGeant4/issues/113>
      o We will ask Mark Dalton about the status of this issue.
  * Issue 111: Difference in Acceptance between G3 and G4
    <https://github.com/JeffersonLab/HDGeant4/issues/111>
      o We will ask Colin Gleason about the status of this issue.
  * Issue 109: G4Exception crash after Curve length mis-match
    <https://github.com/JeffersonLab/HDGeant4/issues/109>
      o 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.
  * Issue 107: Feature request - progress indicator
    <https://github.com/JeffersonLab/HDGeant4/issues/107>
      o On Richard's list of things to do.
  * Issue 105: Reading in # events and source
    <https://github.com/JeffersonLab/HDGeant4/issues/105>
      o On Richard's list of things to do.
  * Issue 102: Terminal cleanup?
    <https://github.com/JeffersonLab/HDGeant4/issues/102>
      o On Richard's list of things to do.
  * Issue 93: Calorimeter timing mismatch between g3 and g4
    <https://github.com/JeffersonLab/HDGeant4/issues/93>
      o We will ask Alex Austregesilo about the status of this issue.

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  * This page was last modified on 10 September 2019, at 17:41.

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