HDGeant4 Meeting, October 9, 2018

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HDGeant4 Meeting
Tuesday, October 9, 2018
3:00 pm
JLab: CEBAF Center, A110
BlueJeans: 968592007


  1. Review of minutes from last time
  2. Discussion at September 11 Offline Software Meeting
  3. Issues on GitHub (all)



  • FSU: Sean Dobbs
  • JLab: Mark Ito (chair), Justin Stevens, Beni Zihlmann

We reviewed the following webpages:

  1. Review of minutes from the September 11 HDGeant4 Meeting
  2. Discussion at the September 11 Offline Software Meeting
  3. Issues on GitHub
  • The geometry comparison described in (1) was done by Thomas Britton and Mark. The XML files from HDDS and from CCDB were identical.
  • The mystery of recovery of FDC hits in the transition from wire-based to time-based tracking reported by Beni in (2) remains. HDG3 sees the recovery, HDG4 does not. The mystery of events with no FDC hits visible when scanning HDG4 events also remains.
  • We need to check that studies we use going forward have Simon Taylor's tracking changes from Pull Request #21, merged on September 11.
  • Sean submitted Issue #67 on the photon energy scale. Richard Jones will look into this using a single photon gun.
  • We will talk to Thomas about further studies to uncover the root source of the loss of FDC hits described in Issue #66. The goal is to describe the problems at a stage before tracking.