November 18th 2021

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  • Updates
    • HCal
      • timing resolution ? Still need to check RF time
      • cosmic runs with magnet ON/OFF
      • amplitude seems not to change
      • ready for data
      • looking at TDC spectrum, saw conicidence peak
      • need more statistics to see elastics
      • sharp peak in 1190 ( self timing ? )
    • coincidence trigger
    • Bigbite Shower
    • Hodoscope
      • one HV cable replaced - no more missing
      • calibration good : ready for data
    • GRINCH
      • No updates
    • CDet
      • workaround with the correlated channels - don't need to open the detector
      • taking data for efficiency
      • will start on left hand side
    • GEM Bigbite
      • new UV layer installed - All readout working - Pedestal updated - zero supression working
      • Andrew said timing might be a bit off
      • efficiency of new layer still low for now - around 15%

- suspect strip timing correlation cut

      • might need to adjust latency
      • option to read more samples ? Could do it with VME readout
      • cosmics last night with zero supression : might be ok not using offline zero suppression
    • GEM INFN clean room
    • Helicity
    • Beamline/scalers
      • Eric and David figured out issue : database file was not up to to date
      • 4 MHz clock not reading out 4 MHz need to check clock
    • HV
      • rpi20 from HCAL : directory disappeared - Steve
      • restarting and power cycling
      • might try to network boot, all have identitical files besides
      • nfs mount
  • On-going tasks
    • EPICS / start End of run logging script (Bob 99% ) - just need to add configuration - will make a test configuration - need to make sure we have all variables - and variables to add at begining / end of run and during the run (EPICS 131 event - need to add to analyzer ) issue with ET - could try run ER and EB on same node - way to restart ET ?
      • Carl looking at issues still unresolved - ER and ET communication - code updated - might fix issues - could try to update emu and ET to test
      • ER manages ET system
    • (fixed database issue ) David readout scalers fine and are in tree - from LHRS - still need SBS side will check with Steve - ( done - looks good on sbs side )
    • script check MPD sync ( Ben , Andrew 20%) - code to unpack information already written - need run with those data - timestamp need some work - ( event count aligned, timestamp look odd maybe will check with Andrew )
    • sync check scripts other modules F1, 1190, FADC ( Andrew , Alex, Mark 20%) - Mark will work to have it available
    • reference channel to all crates - need HCal and Shower + RF - need to add RF to HCAL - 3 cables - in hodoscope crate - if shower FADC available can add

separate - need RC box for shower and hodo if possible - need to check - module will be added ( Mark )

    • Trigger latch TS to TDC ( Bob,Ole 100 % ) - trigger bank has latch
    • event type decoding in analyzer - ( mention at analysis meeting ) - need update CH analyzer
      • Possible new tasks
        • User event inserted at each split with timestamp, spectrometer information - should discuss with
        • autoanalysis at end of run - ( Paul has something setup 75 % but still need to be tested ) some issues launching jobs automatically - could have 3, one on each machine

- still issues with non interactive shell - could try for next production

        • setup laptop for CH blujeans and Slack - need fix hard drive


  • Unresolved issue
    • Scaler gating ( need cable and go through TTL/ECL converter ) (fixed)
    • TI shower in William office (fixed)
    • (need to test)FADC bad channel - FADC replaced but problem could not be reproduce - need to test more ( on going - low priority ) - FADC in test lab - DAQ setup - need to feed signal
    • (still there)warning PEB ROC - Bryan checking with Dave - might incorrect flag - not sure why - but data still in sync since only happens - still happening - not sure if it is an issue
    • HV can put documentation for other non EPICS control
    • (50%) near 100 MB/s limit for FADC crates - Shower window was divided by 2 - HCal windows - could do 150 ns - Move FADCs to top crate ? - can reach 5.2 KHz now
    • (cannot be fixed - been that way forever) Raster X1 vs Raster X2 anticorrelation
    • EPICS insertion : working better but still hangs for long runs
    • ROC19 busy fiber : issue became worse - MPD23 disabled - firmware fixes to be implemented for reset -
    • (new) ER1 hangup - related to ET issue - VTP can get stuck - resetting run usually fixes
    • (new) TDC errors - just one run though - https://logbooks.jlab.org/entry/3923168
    • (new)HCAL flag file crashing ROCs : file too long ? - max file length to add -
    • (fixed) Raster saturation ( fixed with 20 db attenuator ) -
    • No clear signal in GRINCH - latency was adjusted - need check with beam ( see signal now )
    • HCAL fifo overflow https://logbooks.jlab.org/entry/3925327 - will check HCal people ( maybe empty channels - trigger info )
    • (new) issue with 50 k scripts making entry - logentry script puts a limit on java memory - 50 k and 5 k scripts were changed to use it - might want to use this new script to avoid issues - HALOG from Paul -

Logentry script: https://logbooks.jlab.org/entry/3933875 - is that a ulimit issue ?

  • 3820 scalers : issue to address - will get more as spare - and need -
  • tftp issue : network - switch transceiver

GEn RP

  • GEN RP DAQ
    • both VTP working : 10 gigE link from VTP to computer
    • working on VTP update to handle more that 32 MPDs
    • debugging fiber connection
    • will bring VME crate
    • new MPD might arrive for Thanksgiving : 15 MPDs
    • new distribution box ready
    • received lemo cables