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LArIAT Run 2 Shifter Instructions » History » Version 110

Jason St. John, 04/13/2016 03:32 PM

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*Please don't hesitate to contact the experts when something doesn't look right!!!*
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%{color:red}"Troubleshooting Problems":https://cdcvs.fnal.gov/redmine/projects/lariat-online/wiki#Troubleshooting% for help
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{{toc}}
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[[Before your first shift at LArIAT]] Check here so you're ready.
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h1.  %{color:green}At the start of the shift%
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Before anything else: [[How to set up your shift station]]
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*_Remember to call MCR (x3721) at the beginning and ending of each shift!!!_*
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Main Control Room (internationally) +1.630.840.3721
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# In the LArIAT "e-log":http://dbweb0.fnal.gov/ECL/lariat/E/index, fill out the *Start of Shift Checklist*
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## Instructions to check how much remaining "Wire Chamber Gas":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/Wire_Chamber_GasElectronics_Instructions
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# Find out from the shifter before you if there are any issues.
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# Refresh and read the "Run Plan":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/Run_Plan:
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## what beam request LArIAT wants
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## any interruptions to expect
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## special conditions or known problems
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h1.  %{color:green}During the shift%
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The shifter is responsible for the *beam and the detector heath*, *data taking*, logging what happens in the *e-log*,and maintaining *data quality*. 
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* If you have questions, use Google Hangouts: send an email to lariat.shift@gmail.com to get invitation.
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* If that doesn't work please call an expert! "LArIAT Call List":https://docs.google.com/spreadsheets/d/1BCeFLgITn6lzCUgPFUd5y_5taIngt-yKgxg8y2l-tNY/edit?usp=sharing
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h2. Starting a new run
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* In the DAQ terminal window, type <pre>go 500</pre>  "Detailed DAQ instructions":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/LArIAT_DAQ_Instructions
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* The DAQ should make an e-log entry for you automatically.
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h2. During an ongoing run
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h3. Beam and detector health
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* "ACNET":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/Using_ACNET_for_monitoring to monitor the beam intensity and quality, especially:
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** the *S60* page of ACNET (intensity constant and not too high)
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** the profile plots for *MC7WC1* and *MC7WC2*. (beam is focused on target in MC7)
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* Synoptic (detector conditions alarms: everything on, not too much current, no temperatures too high, TPC safely submerged in LAr, etc..)
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h3. Data taking
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* "Run Status Webpage":http://lariat-wbm.fnal.gov/lariat/run-alert.html to monitor the run status (run number, number of spills, numbers of triggers, etc)
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** Note that, on the Run Status Webpage, %{color:red}if the run time appears red%, and the spills stop increasing, %{color:red}the run has come to a stop.%  It will also speak an audible alert, once. *Start a new run immediately.*
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** Sometimes the Run Status page freezes. Refresh it to check.
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* Useful: "Recent run history":http://lariat-wbm.fnal.gov/wbm/servlet/LariatRunSummary
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h3. E-log
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* "E-log":http://dbweb0.fnal.gov/ECL/lariat/E/index site for recording anything of significance which is relevant to the experiment.
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h3. Data quality
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* "Online DQM":http://lariat-dqm.fnal.gov/ to check basic data integrity. 
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** "Data Stream metrics":http://lariat-dqm.fnal.gov/metrics/data-stream shows that all front-end electronics are delivering data.
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** "Data stream page":http://lariat-dqm.fnal.gov/data-stream?live shows if pedestal events, beam events, and cosmic events are all good.
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* "Event Viewer":https://cdcvs.fnal.gov/redmine/projects/lariat-online/wiki/Event_viewers to see TPC events.  
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** If every beam event is too crowded and there are no simple events: 
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*** Check the "Beams Division e-log":https://www-bd.fnal.gov/Elog/?logNames=Booster%2C+External+Beamlines%2C+Linac%2C+Main+Injector%2C+Operations to see if MTest is being tuned, which affects LArIAT's MCenter beam. Tuning often takes 10-25 minutes.
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*** Consult the experts on Google Hangouts. They may ask you to call the MCR to request lower beam intensity.
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** 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!
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h1. Troubleshooting Problems
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* Most problems solved: "Troubleshooting Page":https://cdcvs.fnal.gov/redmine/projects/lariat-online/wiki#Troubleshooting
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** Keywords: DAQ, kerberos, start run, crash, wire chambers, TDC, wire chamber controller, telnet, MWPC, reset, trigger, configuration, ASIC, interlock,
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* Still need help? "Call an expert":https://docs.google.com/spreadsheets/d/1BCeFLgITn6lzCUgPFUd5y_5taIngt-yKgxg8y2l-tNY/edit?usp=sharing
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* 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!
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h1.  %{color:green}At the end of the shift%
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* 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. 
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 *_Remember to call MCR at the beginning and ending of each shift!!!_*
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h1. *_Remember to call MCR at the beginning and ending of each shift!!!_*