Run Planning Meeting Notes, Mar 12-Mar 18, 2020

Thursday, March 12

1. Last 24 hours
   • DAQ "data corruption" error from FCAL crate -- seen before?
   • 10% drop in PS coincidence rate seen at beginning of new run, 04:42
2. Reports/Issues
   • new labels on trigger monitoring plot
   • Root-spy guidance help pages -- already implemented, thanks David!
     • default page is brief explanation + expert to call in case of questions, issues
     • experts can add instructions if they want to be called less often
     • updates to text are through github -- project??
3. Run Plan
   • Production

Friday, March 13

1. Last 24 hours
   • DigiHits_occupancy monitoring plots missing? -- Naomi
   • HV raised on many (25) TAGH channels -- Beni
   • beam unstable (when available) during afternoon -- Alexander
   • beam energy step, 2 MeV, understood -- Reinhard
2. Reports/Issues
   • updates to rootspy guidance
   • bubblers at add line ok? -- Mariana
   • apparent changes in BCal attenuation lengths -- Mark Dalton
   • LED ref TDC monitoring plot missing? -- Mariana
   • rapid drop in transmission close to 15% -- Alexandre
3. Run Plan
   • Tentative new make-shift schedule
   • TAC run today, after Hall C done
   • Production

For the period starting evening of Tuesday, March 17

Tentative Revised Shift Schedule -- Viral Edition

Monday, March 16

1. Last 72 hours
   • TAGH hv adjustments, recovery of failed channel -- Beni
   • TAC run impossible, bleed-through from Hall A? -- Sasha
   • snake scan of CCAL completed -- Sasha
   • threshold scan of TAGH completed -- Sasha
   • difficulties with DIRC hv, resolved -- Justin
   • drop in collimator transmission by 20% -- Alexander
     • reduced current tests during transmission dip
     • harp scans show over-focus in y at collimator, [1]
     • gradual recovery within 23 hours
2. Reports/Issues
   • strange pattern in fdc occupancy -- Alexander
   • fadc250 data corruption issue? -- Beni
     • problem narrowed down to one fadc250 module
   • unable to reproduce notch structure around coinc peak in TAGM timing monitoring plot -- Richard
     • standard guidance on how to reproduce monitoring plots following fixes?
   • repeated DAQ start issues resolved by rebooting rocs
     • shift crew is losing time retrying failed starts, often blind to what is blocking.
     • can we get standard guidance on how to find which roc is holding busy?
3. Run Plan
   • TAC run to be taken opportunistically, when Hall A is down -- Sasha
   • Plan to instrument active collimator with a reference electrode bias -- Richard
   • Tagger microscope intensity scan with diamond radiator requested (1 shift) -- Richard
   • Production
4. Jlab at MEDCON 5 -- starting tomorrow!

Tuesday, March 17

1. Jlab at MEDCON 5 -- starting today!
   • Continuous bluejeans meeting open in counting house
   • Hall D going to single-person shifts starting today at 16:00
2. Last 24 hours
   • fcal PDU reboot recovers missing channels -- Colin
   • raw mode run 72291 (30 minutes of beam) was taken, then production continued
   • fadc250 in FCAL7 slot 3 replaced
3. Reports/Issues
   • Notches in TAGM timing histos fixed, (online software rebuild) -- Alexandre
   • Removed several timing macros from rootspy
   • Collimator transmission trends update -- Alexandre
4. Run Plan
   • New BCal pedestal run requested -- Mark
   • TAC run planned for Wednesday morning, starting 7:00am when Hall A plans a Moller run -- Sasha
   • Plan to instrument active collimator with a reference electrode bias -- Richard
   • Tagger microscope intensity scan with diamond radiator requested (1 shift) -- Richard
   • Other systematics studies?
     • Low-intensity scans to study reconstruction efficiency dependence on photon intensity: suggested run plan and list of runs from 2018 scans
   • Building access at MEDCON 5