GlueX TOF Meeting, May 22, 2014

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GlueX Time-of-Flight Meeting
Thursday, May 22, 2014
10:00 am EDT
JLab: CEBAF Center, F326


  1. Announcements
    1. Contract Close-out
  2. Review of meeting on May 8
  3. Installation Update
    1. Location
    2. Cabling
    3. Read-Out
    4. Trigger


  1. To join via Polycom room system go to the IP Address: ( and enter the meeting ID: 190670770.
  2. To join via a Web Browser, go to the page [1]
  3. To join via phone, use one of the following numbers and the Conference ID: 190670770
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560
  4. More information on connecting to bluejeans is available.


Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2014-2Q on the JLab CUE. This directory is accessible from the web at .



  • FSU: Sasha Ostrovidov
  • JLab: Hussein Al Ghoul, Chuck Hutton, Mark Ito (chair), Vanik Kakoyan, Beni Zihlmann

Update on High Voltage Control

Hussein: I discussed the HV GUI's with Nerses and Vanik, and they gave me a brief description of how to control the channels. The below photos are snapshots of the actual interface.

The following is a part of the Nerses's email suggesting a naming scheme for the TOF:


Where PLAIN could be {1,2} or {F,B} (i.e. Forward, Backward) or {U,D} (i.e. Upstream, Downstream) PADDLE could be [1-22] PADDLE_SIDE [1-2] or it could be {N,S,U,D} (i.e. North South Up Down) or {N,S,T,B} (i.e. North South Top Bottom) or {L,R,T,B} (i.e. Left Right Top Bottom) DETECTOR_SIDE could be {1,2,3,4} or it could be {N,S,U,D} (i.e. North South Up Down) or {N,S,T,B} (i.e. North South Top Bottom) or {L,R,T,B} (i.e. Left Right Top Bottom) The channel, I guess, would be just number in the range 1-44"





We discussed some of the design choices:

  • Having green always labeled "off" and red always labeled "on", the convention being, look at the color to determine status, read at the label to determine click action. We discussed whether this was an obvious convention.
  • Having only two states indicated: green meaning "finished ramping up" and red meaning other, i. e., ramping up, ramping down, tripped, or finished ramping down. We discussed whether these other states could be indicated since they are reported by the hardware.