GlueX TOF Meeting, August 1, 2013

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GlueX Time-of-Flight Meeting
Thursday, August 1, 2013
10:00 am EDT
JLab: CEBAF Center, F326/327


  1. Announcements
  2. Review of last TOF bi-weekly meeting
  3. Construction news
  4. Installation plan and document



  1. ESNet: 8542553

Desktop Sharing

  1. Go to
  2. In the "join a meeting" box enter the code: 1833622
  3. Fill in the participant registration form.


To connect by telephone:

  1. dial:
  2. enter access code followed by the # sign: 1833622#


Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2013-3Q on the JLab CUE. This directory is accessible from the web at .


  • iron material for PMT shields received at FSU (ordered by Jlab, drop shipped to FSU)
  • After some glue joints between PMT and light guide were found hazy all light guide were re-polished to assert flatness of the interface between light guide and PMT
  • Gain balancing procedure implemented in code and tested. takes 1/2 hour for 5000 events and is repeated about 6 -7 times at different HV settings with 6 modules at a time.
  • Develop now walk correction procedure with flash ADCs
  • From test measurements will get: attenuation length, timing resolution, position resolution, speed of light in the modules and gains.
  • An installation issue was raised during the Friday installation meeting on what mechanisms are in place to minimize any gap between paddles when being installed in the plane. This issue needs further investigation.