Difference between revisions of "CountingDaq 220429"

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== Agenda ==
 
== Agenda ==
 
*  "Digital BCM readout: what was done and what could be done at JLab" -- Bob M.
 
*  "Digital BCM readout: what was done and what could be done at JLab" -- Bob M.
 +
                  https://userweb.jlab.org/~rom/digibcm/DigiMonStatus.pdf
 
*  Activity updates
 
*  Activity updates
 
*  Thoughts about getting ready for 90% review
 
*  Thoughts about getting ready for 90% review
Line 23: Line 24:
 
**  HDMI cable length tests; decision on MPD position; radiation environment evaluation for MPDs
 
**  HDMI cable length tests; decision on MPD position; radiation environment evaluation for MPDs
 
**  Availability of Hanjie's SOLID test stand firmware as reference/example for VTP trigger definition?
 
**  Availability of Hanjie's SOLID test stand firmware as reference/example for VTP trigger definition?
 +
***  Available at https://github.com/hanjie1/solid_ecal
 
**  Follow-up with grounding working group?
 
**  Follow-up with grounding working group?
 
**  Beam monitor requirements for counting mode and how to instrument?
 
**  Beam monitor requirements for counting mode and how to instrument?
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==  Minutes ==
 
==  Minutes ==
−
Recording on Zoom:   
+
Recording on Zoom:  [https://jlab-org.zoomgov.com/rec/share/yDVbOmt5SyTJiDEAYXxBoyfs-Z3BJr1D07oeC3l54gV_FRjt-Vj5EuuIu5OHseBk.xczDhn1-yC9rHgXk?startTime=1651247439000]
  
−
Participants:
+
Participants: R. Michaels, C. Ghosh, D. Armstrong, P. King, C. Zorn, D. McNulty, B. Moffit
 +
 
 +
*  Discussion of previous work on JLab digital beam monitors
 +
**  Chad and Randall had previously had a system to send digital data, a 24-bit word at 10ksps, from a BCM to a V1495.  The V1495 accumulated these data words to produce the charge integral over a CODA run
 +
**  Bob and I will follow up with John and Chad Seaton about the path to develop a system that would meet our needs.
 +
*  Activity updates
 +
**  Paul has restored the server for his test stand at OU (after a major server crash)
 +
**  Bob now has a VTP in his TEDF test stand, but hasn't started working with it yet.
 +
***  We have Hanjie's github repo with the SOLID VTP test stand firmware, and Bob is also following the development of the HCAL VTP firmware
 +
**  David hasn't received the HDMI cables for the length study yet
 +
**  David is working to get xray fluxes at the GEMs, to be able to see if that will cause significant changes in our rates.  He may have a result in a few weeks
 +
*  Discussion of what to do for 90% review
 +
**  We haven't put in the change request to take the VETROC out of our design.
 +
***  David suggests bringing Mark P. into the discussion about removing the VETROC to see if some of the diagnostic channels need the better timing.
 +
***  In our previous plan, we had specified the JLab discriminator/scaler modules that were clocked at 125MHz, so to benefit from the better time resolution we'd need to specify different discriminators
 +
***  ''Note added after the meeting:  there may be some channels where we just want to look at timing, such as the timing between the event trigger and the GEM clock.  So we might want a VETROC and some discriminators in the system even if we don't use them for the bulk of the channels.''
 +
**  The major issue for setting up the 90% review is getting the beamline instrumentation better defined.  Bob and I will follow up in a few weeks to decide if we need to delay the 90% review from the penciled-in "June" time-frame

Latest revision as of 21:06, 10 May 2022

Back to Main Page >> Data Acquisition Meetings >> Counting mode DAQ meetings

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Meeting information

 Meeting time:  12:00pm Eastern
   
 Zoom connection information
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 https://jlab-org.zoomgov.com/j/1603800887?pwd=aXVmSnN6aWZWN3RBdXB4RUhGckZJdz09
 
 Meeting ID: 160 380 0887
 Passcode: 903612
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 Find your local number: https://jlab-org.zoomgov.com/u/ab8341cjcG

Agenda

  • "Digital BCM readout: what was done and what could be done at JLab" -- Bob M.
                 https://userweb.jlab.org/~rom/digibcm/DigiMonStatus.pdf
  • Activity updates
  • Thoughts about getting ready for 90% review
    • Need to draft & submit the change request to take the VETROC out of design
    • HDMI cable length tests; decision on MPD position; radiation environment evaluation for MPDs
    • Availability of Hanjie's SOLID test stand firmware as reference/example for VTP trigger definition?
    • Follow-up with grounding working group?
    • Beam monitor requirements for counting mode and how to instrument?
    • Electrical safety evaluation of components; Electrical Safety Committee member for review?
  • General discussion

Minutes

Recording on Zoom: [1]

Participants: R. Michaels, C. Ghosh, D. Armstrong, P. King, C. Zorn, D. McNulty, B. Moffit

  • Discussion of previous work on JLab digital beam monitors
    • Chad and Randall had previously had a system to send digital data, a 24-bit word at 10ksps, from a BCM to a V1495. The V1495 accumulated these data words to produce the charge integral over a CODA run
    • Bob and I will follow up with John and Chad Seaton about the path to develop a system that would meet our needs.
  • Activity updates
    • Paul has restored the server for his test stand at OU (after a major server crash)
    • Bob now has a VTP in his TEDF test stand, but hasn't started working with it yet.
      • We have Hanjie's github repo with the SOLID VTP test stand firmware, and Bob is also following the development of the HCAL VTP firmware
    • David hasn't received the HDMI cables for the length study yet
    • David is working to get xray fluxes at the GEMs, to be able to see if that will cause significant changes in our rates. He may have a result in a few weeks
  • Discussion of what to do for 90% review
    • We haven't put in the change request to take the VETROC out of our design.
      • David suggests bringing Mark P. into the discussion about removing the VETROC to see if some of the diagnostic channels need the better timing.
      • In our previous plan, we had specified the JLab discriminator/scaler modules that were clocked at 125MHz, so to benefit from the better time resolution we'd need to specify different discriminators
      • Note added after the meeting: there may be some channels where we just want to look at timing, such as the timing between the event trigger and the GEM clock. So we might want a VETROC and some discriminators in the system even if we don't use them for the bulk of the channels.
    • The major issue for setting up the 90% review is getting the beamline instrumentation better defined. Bob and I will follow up in a few weeks to decide if we need to delay the 90% review from the penciled-in "June" time-frame
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