Difference between revisions of "Run Planning Meeting Notes, Oct 11-Oct 17, 2018"

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#* Beam back at 11:30 am, Sasha finished L1 trigger studies by 2:00 pm  
 
#* Beam back at 11:30 am, Sasha finished L1 trigger studies by 2:00 pm  
 
#* MCC suggests they recalibrate iIon chamber to reduce trip rates. Previously, it was only calibrated up to 80 nA.
 
#* MCC suggests they recalibrate iIon chamber to reduce trip rates. Previously, it was only calibrated up to 80 nA.
−
#* Sergey performed high rate DAQ tests with current up to 900 nA (want to try at 1 uA?)
+
#* Sergey performed high rate DAQ tests with current up to 900 nA
 
#* [https://logbooks.jlab.org/entry/3607777 David has new online monitoring site up]
 
#* [https://logbooks.jlab.org/entry/3607777 David has new online monitoring site up]
 
#CEBAF
 
#CEBAF
−
#*  
+
#* Almost 20 BLM trips/hour through yesterday and into the early morning. Hall C went down around 4 am and BLM trips were significantly reduced. They think there is something wrong with the beam that is being injected into the accelerator.
 +
#* Will do a retune of the accelerator around 10am today. Should take 1-2 hours.
 
#Action Items
 
#Action Items
 
#Issues
 
#Issues
 
#* Multiple alarms for BCAL downstream environmental sensors. Elton contacts Nick who reports [https://logbooks.jlab.org/entry/3607819 downstream BCAL PLC -Ethernet port quit]. Access needed.
 
#* Multiple alarms for BCAL downstream environmental sensors. Elton contacts Nick who reports [https://logbooks.jlab.org/entry/3607819 downstream BCAL PLC -Ethernet port quit]. Access needed.
 +
#* Lots of DAQ issues. Sergey had to revert the software back to a previous version
 +
#* Beam Position Issues
 +
#** [https://logbooks.jlab.org/entry/3607836 Eugene noticed beam was drifting, which coincided with drops in rates (6:00pm)]
 +
#** This continued throughout swing shift and into early morning
 +
#** [After an extended downtime, beam appears to be stable through the night]
 +
#** Hall C went down and then we got a retune where the locks in the accelerator were reset. No more drifting. [https://logbooks.jlab.org/entry/3608059 Excess rate over the template suggests that significant parts of the beam are striking the diamond frame.
 +
 +
].[https://logbooks.jlab.org/entry/3608067 Improved coherent peak after retune].
 +
#* [https://logbooks.jlab.org/entry/3608095 Diamond alignment issue?]
 
#Reports
 
#Reports
−
#*[https://logbooks.jlab.org/entry/3607590 Monitoring Report]
+
#* [https://logbooks.jlab.org/entry/3608120 CDC pressure during Michael]
 +
#*[https://logbooks.jlab.org/entry/3608119 Monitoring Report]
 
#* [https://halldweb.jlab.org/data_monitoring/Plot_Browser.html Plot Browser]  
 
#* [https://halldweb.jlab.org/data_monitoring/Plot_Browser.html Plot Browser]  
 
#* [https://docs.google.com/spreadsheets/d/1NffTc4-S5PbTMSuH_pp7ZYsGRH4JC_WSVo770_iJYt0/edit#gid=1865737386 Statistics Spreadsheet]
 
#* [https://docs.google.com/spreadsheets/d/1NffTc4-S5PbTMSuH_pp7ZYsGRH4JC_WSVo770_iJYt0/edit#gid=1865737386 Statistics Spreadsheet]

Revision as of 08:29, 12 October 2018

Friday, Oct 12 at 08:45

  1. Notes from the past 24 hours:
    • Beam back at 11:30 am, Sasha finished L1 trigger studies by 2:00 pm
    • MCC suggests they recalibrate iIon chamber to reduce trip rates. Previously, it was only calibrated up to 80 nA.
    • Sergey performed high rate DAQ tests with current up to 900 nA
    • David has new online monitoring site up
  2. CEBAF
    • Almost 20 BLM trips/hour through yesterday and into the early morning. Hall C went down around 4 am and BLM trips were significantly reduced. They think there is something wrong with the beam that is being injected into the accelerator.
    • Will do a retune of the accelerator around 10am today. Should take 1-2 hours.
  3. Action Items
  4. Issues 
].Improved coherent peak after retune.
  2. Reports
  3. Run Plan
    • Need to schedule a TAC run
      • Can we do this opportunistically?
      • Use bleedthrough current?
      • Hall C plans to switch experiments on approximately the 22nd. This is around the time of accelerator maintenance, so they may plan to switch experiments then.
    • Hurricane Michael arriving this evening. Do we need to take any precautions?
    • Week 4 Week 5
      • Beam Studies Monday
      • RF Recovery Tuesday

Thursday, Oct 11 at 08:45

  1. Notes from the past 24 hours:
    • Beam issues most of swing (7hrs to complete amorphous run) and owl shift (~1hr of beam in total).
  2. CEBAF
    • 5th pass separator failed during swing shift and remained problematic into the beginning of owl. Beam back at 3:20am.
    • PSS drop in the machine at 3:30 am. No beam until 6am.
  3. Action Items
  4. Issues
  5. Reports
  6. Run Plan
    • Need to schedule a TAC run
      • Can we do this opportunistically?
      • Use bleedthrough current?
      • Hall C plans to switch experiments on approximately the 22nd. This is around the time of accelerator maintenance, so they may plan to switch experiments then.
    • Hurricane Michael arriving this evening. Do we need to take any precautions?
    • Week 4 Week 5
      • Beam Studies Monday
      • RF Recovery Tuesday
  7. AOB
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