PMT tiles missing after restarting data taking

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Missing tiles from North Box in Rootspy occupancy plot
Missing tiles from South Box in EPIC scalar plot


Description on the Symptoms

After restarting DAQ, the missing tiles can be seen on the occupancy plots on Rootspy (see an example image to the right). The same missing tile can be observed on the 2D scalar screen too.

Solution

  1. Stop the current run.
  2. Completely restart Coda (by pressing STOP button on the RCM GUI).
  3. Start Coda normally (Configure->Download->Prestart->Start)
  4. Call DIRC expert if problem was not resolved.

Occupancy of the Issue During Operation

RunPeriod-2019-11
Date Resolved After DAQ Reboot Box Tile Run Affected Log Entry
2020 Feb 5, 07:39 Yes North c1:r2 71706 https://logbooks.jlab.org/entry/3777989
2020 Feb 2, 21:55 Yes North c2:r11 71673 https://logbooks.jlab.org/entry/3776118
2020 Jan 31, 02:03 Yes North c1:r4 71642 https://logbooks.jlab.org/entry/3774429
2020 Jan 30, 13:29 Yes North c1:r4 71633 https://logbooks.jlab.org/entry/3774125
2020 Jan 29, 19:37 Yes North c1:r15 71624
2020 Jan 27, 15:18 Yes North c2:r15 71595 https://logbooks.jlab.org/entry/3772139
2020 Jan 15, 13:43 Yes South c2:r7 71397 https://logbooks.jlab.org/entry/3764225
2020 Jan 12, 06:32 Yes North c2:r4 71367 https://logbooks.jlab.org/entry/3762186