GlueX Start Counter Meeting, March 9, 2017

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GlueX Start Counter Meeting
Thursday, March 9, 2017
11:00 am EST
CEBAF Center, Room F326/327


  1. Announcements
  2. Review minutes from the last meeting
  3. Run Status
  4. Calibration
  5. NIM/TDR
  6. Action Item Review




Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2017 on the JLab CUE. This directory is accessible from the web at .



  • JLab: Thomas Britton, Mark Ito (chair), Mahmoud Kamel, Simon Taylor

There is a recording of this meeting on the BlueJeans site.

We had a very brief meeting. Mahmoud presented his latest results from his time-walk calibration. Early on we discovered a small problem with the analysis which made it hard to discuss the bulk of his results in detail, but in summary, he has overhauled his approach. He now makes fits to one-dimensional histograms of TDC time vs. ADC time, in various intervals of peak pulse height to build up data for the time walk correction fit. The fit is to the same function he has been using for some time. After that he is getting sub-300-ps resolution in all counters, but no marked improvement from what was obtained with his old method.