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LArIAT Run 2 Shifter Instructions » History » Version 92

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Jason St. John, 04/07/2016 05:27 PM


LArIAT Run 2 Shifter Instructions

Remember to call MCR (x3721) at the beginning and ending of each shift!!!
Main Control Room (internationally) +1.630.840.3721

Please don't hesitate to contact the experts when something doesn't look right!!!
Troubleshooting Problems

Before your first shift at LArIAT Check here so you're ready.

At the start of the shift

How to set up your shift station

  • In the LArIAT e-log, fill out the Start of Shift Checklist
  • Find out from the shifter before you if there are any issues.
  • Refresh and read the Run Plan:
    • what beam request LArIAT wants
    • any interruptions to expect
    • special conditions or known problems

During the shift

The shifter is responsible to restart the run if it ends, and to ensure that the data are of the highest quality.

Starting a new run

  • In the DAQ terminal window, type
    go 500
    Detailed DAQ instructions
  • The DAQ should make an e-log entry for your automatically.
  • Special cases (if experts ask you to help):

During an ongoing run

  • Monitor the beam status using the instructions in the Using ACNET for monitoring, namely
    • the S60 page of ACNET and
    • the profile plots for MC7WC1 and MC7WC2.
    • From ~ftbf_user/acnet or ~lariat/acnet, run ./LArIATViewer.sh to open the Synoptic displays.
  • Run Status Webpage to monitor the run status (run number, number of spills, number of triggers, etc)
    • Note that, on the Run Status Webpage, if the run time appears red, and the spills stop increasing, the run has come to a stop. It will also speak an audible alert, once.
    • In order to get it running again, you can issue the 'lariatReset' command in the DAQ terminal, followed by 'go'.
    • Sometimes the Run Status page freezes. If this happens, see if your DAQ command line has reset. If so, the run has ended. Follow above instructions.
    • Did the run number fail to increment? If the number has reset to a low number such as 1 stop the run and then edit /opt/lariat-online/config/runNumber.dat to correct the run number. Start new run after.
  • Online DQM to check basic data integrity.
  • Use the event viewer to see TPC events. See Event Viewer Instructions . If you decide to post some interesting event in the e-log, please write the number of the spill/event in the title or content of the entry. It's much easier to search for them later!
  • Useful: Recent run history

Troubleshooting Problems

  • If a VME Power Supply has to be turned off in an emergency situation (e.g. problem with TPC PMTs) - turn off the regulate function first, then put the decreasing voltage values in the quick ramp window, go to 0 and then turn off!

At the end of the shift

  • Make an entry in the e-Log using the form "Shift Summary" summing up the relevant information from the shift. For any other information to be posted in the e-Log during the shift use the "default" form.

    Remember to call MCR at the beginning and ending of each shift!!!

Remember to call MCR at the beginning and ending of each shift!!!