Difference between revisions of "Run Planning Meeting Notes, Feb 9-Feb 15, 2017"

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(Tuesday, February 14)
(Tuesday, February 14)
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==Tuesday, February  14==
 
==Tuesday, February  14==
 
# Accelerator Status
 
# Accelerator Status
#* Extended down Monday
+
#* 31 hours without beam, and counting.  LCW tripped off but no alarms due to a bad flow meter.  Temperature sensors tripped off the magnets.  Suspected short in magnet on recovery, repaired with insulation. 
 
# Hall-D/GlueX items
 
# Hall-D/GlueX items
#*  Running last 48 hours
 
#** ABU:
 
#** BANU:
 
#** Triggers: 
 
#*** How many are hadronic in the coherent peak? 
 
#* Solenoid power supply transistor light persists [https://logbooks.jlab.org/entry/3457513] [https://logbooks.jlab.org/entry/3457753]
 
#** Not a problem.  Instruct shift crew to ignore this.
 
 
#* Coherent edge [https://logbooks.jlab.org/entry/3458016]
 
#* Coherent edge [https://logbooks.jlab.org/entry/3458016]
#* Monday Access: cable was run [https://logbooks.jlab.org/entry/3457988], collimator insert fits [https://logbooks.jlab.org/entry/3457986]
+
#* Monday opportunistic access: cable was run [https://logbooks.jlab.org/entry/3457988], collimator insert fits [https://logbooks.jlab.org/entry/3457986]
 
# Monitoring
 
# Monitoring
 
#* Low level
 
#* Low level
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#** Harp scans
 
#** Harp scans
 
#* Production
 
#* Production
#* Harp scan every 2 days.  Monday
+
#* Harp scan every 2 days.  When beam returns.
 
#* Empty target run.  1 hour.  100 nA with diamond.
 
#* Empty target run.  1 hour.  100 nA with diamond.
 
#* Trigger efficiency studies (2 hours) Wednesday.
 
#* Trigger efficiency studies (2 hours) Wednesday.

Revision as of 09:09, 14 February 2017

<- Back to Run Coordination Meetings: Spring 2017 Run


Tuesday, February 14

  1. Accelerator Status
    • 31 hours without beam, and counting. LCW tripped off but no alarms due to a bad flow meter. Temperature sensors tripped off the magnets. Suspected short in magnet on recovery, repaired with insulation.
  2. Hall-D/GlueX items
    • Coherent edge [1]
    • Monday opportunistic access: cable was run [2], collimator insert fits [3]
  3. Monitoring
    • Low level
    • High level
  4. Run Plan
    • Tuesday Access
      • Sergei: TRD radiator change
      • Adesh + John: FCAL bases tests
      • Insert 1 mm Collimator insert
      • Tom: Adjust PSpec magnet PS rheostat
      • Alex Deur: Tagger hall
    • Thursday: magnetic -> RF separation. Check beam quality
      • Radiation measurements
      • Beam noise measurement on beam profiler
      • Harp scans
    • Production
    • Harp scan every 2 days. When beam returns.
    • Empty target run. 1 hour. 100 nA with diamond.
    • Trigger efficiency studies (2 hours) Wednesday.
      • Investigate Tagger and SC trigger
    • If there's a Solenoid trip: TAC run and no field track measurement
  5. Offline Analysis?
    • Beam energy [4]
  6. Any Other Business?

Monday, February 13

  1. Accelerator Status
    • Mostly smooth running over the weekend
      • Cryogenics problems Monday Owl
  2. Hall-D/GlueX items
    • Running last 48 hours
      • ABU: 31 hours (371+339+279+380+367+122)
      • BANU: 5 hours (27+65+126+13+59+15)
      • Triggers: 12 billion reached [5]
        • How many are hadronic in the coherent peak?
    • Auto CO2 bottle changeover didn't happen [6] [7]
      • New valve purchased. Bottle will be changed preemptively in future.
    • Nitrogen valve issue [8] [9]
      • This was a controls issue, not quite clear. Under investigation.
    • Rates vary with diamond orientations [10] [11]
      • Evidence suggests this is low energy stuff. Seems like it will cancel to first order in PARA to PERP for both settings.
    • Solenoid power supply transistor light persists [12] [13]
      • Not a problem. Instruct shift crew to ignore this.
    • DAQ disconnection [14]
      • Memory allocation problem solved,
      • network overloaded at certain hours of the day, RC timeout extended to 5 minutes
      • ET system crashes - still mysterious. Under investigation.
  3. Monitoring
    • Low level
      • Report
      • Fluctuations in #/trigger [15]
        • Might be a TDC timing offset issue.
      • Beam properties histogram normalization problem? [16]
        • Divide to normalize instead of subtract.
      • Histogram changes. [17]
        • Will include Theta vs Phi.
    • High level
  4. Run Plan
    • Tuesday Access
      • Hovanes + Tom: cable running
      • Sergei: TRD radiator change
      • Adesh: FCAL bases tests
      • Fit check collimator insert
      • Tom: Adjust PSpec magnet PS rheostat
      • Alex D: Tagger hall
    • Production
    • Harp scan every 2 days. Monday
    • Empty target run. 1 hour. 100 nA with diamond.
    • Trigger efficiency studies (2 hours) Wednesday.
      • Investigate Tagger and SC trigger
    • Raw (Full waveform) run?
      • 10 minutes. 100 nA with diamond
    • If there's a Solenoid trip: TAC run and no field track measurement
  5. Offline Analysis?
  6. Any Other Business?

Saturday, February 11

  1. Accelerator Status
    • 2 hour down overnight for RF problem, cavity "lost" its parameters somehow.
  2. Hall-D/GlueX items
  3. Monitoring
    • Low level
    • High level
      • New features are nice
      • Fits will be improved
      • Beta plots need looking into.
  4. Run Plan
    • Production
    • Harp scan every 2 days. Sunday
    • Empty target run. Monday
    • Trigger efficiency studies (4 hours) Wednesday
  5. Offline Analysis?
  6. Any Other Business?

Friday, February 10

  1. Accelerator Status
    • Difficulties on Day Shift and into Swing. Owl smooth
  2. Hall-D/GlueX items
  3. Monitoring
    • Low level
      • New channel out in FCAL; occupancy drift in single PS channel; LED signals still in some histograms, cuts coming; new statistics on some histograms (nice)
    • High level
      • Rho analysis, 30 kHz data before beam focus was tuned
        • https://logbooks.jlab.org/entry/3456928
        • timing calibration seems out; polarizations might not be good because of lack of accidental subtraction; signal to background looks great; 30% lower rho/trigger compared to Spring 2016(should improve with calibration); omega width 50% larger and yield lower by half
  4. Calibration
    • Calibration jobs are on the farm right now, hopefully ready by Sunday/Monday.
  5. Run Plan
    • Production
  6. Offline Analysis?
  7. Any Other Business?

Thursday, February 9

  1. Accelerator Status
    • Slew of difficulties over Owl shift, pathlength drift, electronics problems, BPM problems
  2. Hall-D/GlueX items
    • Running last day
      • ABUs
      • Triggers
    • Coherent Peak Position difference
    • 50 kHz running
      • Smooth running, hodoscope up to 5.7 GeV turned off. Occasional glitches in the DAQ rate due to Java garbage collection (adding a few percent to deadtime.) 900 MB/s
      • What is the data quality? (Normalized to trigger) Physics signals, (omega, rho: # per trigger, widths, backgrounds)
    • Monitoring
      • Low level monitoring coordinator (Thomas): Report every morning.
      • High level monitoring coordinator (Alex): Report every morning.
      • Cut on triggers for monitoring
      • Run DAQ when beam is gone
      • Threshold for alerting experts?
        • Run coordinator should be called for problems that limit data taking
    • Target IOC problem overnight
      • Reboot should be done by shift crew if they know how, otherwise call Deur, then cal Ito.
    • End run script and RCDB entries
  3. Run Plan
    • Align coherent peaks?
    • Production
  4. Offline Analysis?
  5. Any Other Business?