[Bonuslist] RC Daily Report

[Carlos Ayerbe Gayoso]

Hi All,

this is the status and report of the BONuS experiment (Run Group F), Saturday 21st, 2020

  *   In general a very smooth production day
  *   Owl shift was quite productive after the temporary solution to the RTPC HV issue of Cathode rampind down
  *   During MCC morning meeting, the director Stuart H. aware about the high possibility to move to MEDCON 6
     *   Stepan S. asked the measures to take, specially with BONuS since we would need special accelerator conditions for calibration purposes.
  *   Day shift also productive, with minor issues
  *   Eric C. came to the CH (~11:30) to optimize the RTPC HV values, resulting in no more problems with the HV.
  *   Swing shift equally smooth until the programmed target flush
     *   Per request of Yuri to study the FMT we ask to stop the beam and at the same time proceed with the target flush.
     *   After the purge (30min total) we requested beam back and Jiwan noticed that VTP Trigger alarm low was activated for several bits
     *   we called Sergey and he claimed that it was not a DAQ problem, suggesting a target issue and advice to flush it again (nothing happen)
     *   We called Sebastian and he suggested to change the alarms since possibly the difference was that yesterday filling was not done three times (MY MISTAKE) and today the purge was done correctly.
     *   Some extra issues with DAQ (solved)
     *   Around 23:30h Valery called that we were doing wrong, since it will "corrupt" any cross section calculations (?). He checked the DC and found no issues. Rafayael pointed out that DS Halos were lower than yesterday discarding an issue from ECAL and pointing the possibility of target contamination yesterday
     *   Out of ideas, I manually empty and filled the target two times. After we asked beam back, we found the same rates, which somehow confirm Rafayael hypothesis.
     *   We decided to continue production runs.

Besides my mistake, I think the experiment is running better and better.

Future issues to solve:

  *   Deuterium gas bottle indicates <200psi


Logbook Shift summaries:
Owl: https://logbooks.jlab.org/entry/3806829
Day:  https://logbooks.jlab.org/entry/3806975
Swing: https://logbooks.jlab.org/entry/3807099

We will have our RC Daily Meeting at 10pm via BlueJeans

https://bluejeans.com/7576835804

The RC Daily Meeting Wiki page is:

https://wiki.jlab.org/clas12-run/index.php/Run_Meeting:_March_22nd,_2020
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