GlueX Start Counter Meeting, June 14, 2018

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GlueX Start Counter Meeting
Thursday, June 14, 2018
10:00 am EDT
CEBAF Center, Room L207
BlueJeans: 556 286 544


  1. Announcements
  2. Review minutes from the meeting on May 31
  3. Calibration and Efficiency
  4. Time-dependent geometry adjustments
  5. NIM/TDR
  6. Action Item Review




Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2018 on the JLab CUE. This directory is accessible from the web at .



  • FSU: Sean Dobbs
  • JLab: Mark Ito (chair), Simon Taylor

We met only very briefly.

Sean reported that the discrepancy between the propagation time corrections obtained by him and by Mahmoud can be traced to the use of different plug-ins; Sean's uses all tracks for which there is a useful time, Mahmoud's uses only tracks matched to the TOF. These differences, mainly in the nose region are being resolved.

For now, for the paddle-to-paddle timing calibration, Sean is using only the barrel region of the start counter.