Octorber 29nd 2021

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  • Updates
    • HCal
    • coincidence trigger
    • Bigbite Shower
      • looking at preshower
    • Hodoscope
      • working on calibration
      • might need to adjust HV
      • FADC might be running at 40 MHZ - will get clock from other crate scaler -
    • GRINCH
      • timing signal not showing up - seems decoder issue
      • Mark and Bradley check with EDTM signal : could see in scaler and raw data
      • windows was set to 1100 ns, widen and changed latency to 1200 so should see signal now
    • CDet
    • GEM Bigbite INFN
    • GEM INFN clean room
    • GEM UVA clean room
    • Helicity
      • working , working on decoder
      • new helicity board in TEDF setup
    • Beamline/scalers
      • Bob and David look at scaler data
      • u new , x3 and x 10 - pedestal exactly 0 - negative offset from receivers - checked with pulser everything working - need beam current scan
      • take one other signal and swap to check it shows up

Raster test: https://logbooks.jlab.org/entry/3928752

    • HV


  • 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 ) - Provokar gave scripts for some variables to be added : HV for all detectors - issue with ET - Paul checking if there are scripts submitting event as Beginning Of Run event - might be reason for hang-ups

see all events in data stream -

    • David readout scalers fine and are in tree - from LHRS - still need SBS side will check with Stevev
    • script check MPD sync ( Ben , Andrew 20%) - code to unpack information already written - need run with those data - timestamp need some work
    • sync check scripts other modules F1, 1190, FADC ( Andrew , Alex, Mark 20%)
    • (90%) 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

    • (new) Trigger latch TS to TDC ( Bob,Ole 100 % ) - trigger bank has latch
    • event type decoding in analyzer - ( mention at analysis meeting ) - need to check with Ole - decoding done and will get in the tree
    • MPD retiming with V1495 ( done ) - timestamp issue still need to be implemented - in datastream but might still have issues - can fix with firwmare update - can use TI timestamp to check with other - MPD timestamp not always reliable and misaligned at the start - might be best to test in EEL first - timestamp - event counter working - couple of hours - updating MPD, V1495 and readout list - might need 4 hours - can induce change in latency -
    • need to look at MPD timestamp make sure they all agree
      • Possible new tasks
        • rcdb
        • check latency with DiagGui ( needs firmware and code work - low priority )
        • User event inserted at each split with timestamp, spectrometer information - should discuss with andre
        • mysql database
        • 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
        • setup laptop for CH blujeans and Slack - need fix hard drive
        • hodoscope calibration
        • HCAL calibration
    • GEN RP
      • setup on halladev ( done )
      • setup VTP - Bryan working on setting computers and VTP - Ben will bring 2nd VTP
      • both VTP running with triggers (Bryan ) can see MPD from QSFP transceiver, debugging fiber connection and try triggered data


  • Unresolved issue
    • (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 ?
    • (new, sort of) HV hodoscope channels turning off
    • (cannot be fixed - been that way forever) Raster X1 vs Raster X2 anticorrelation
    • (new) EPICS insertion : working better but still hangs for long runs
    • (new) ROC19 busy fiber : issue became worse - MPD23 disabled - firmware fixes to be implemented
    • (new) ER1 hangup - related to ET issue -
    • (new) TDC errors - just one run though - https://logbooks.jlab.org/ent

ry/3923168**(new) sbsvtp1 not detecting MPD fiber

    • (new)HCAL flag file crashing ROCs : file too long ? - max file length to add -
    • (new) Raster saturation ( fixed with 20 db attenuator )
    • (New) No clear signal in GRINCH - latency was adjusted
    • HCAL fifo overflow https://logbooks.jlab.org/entry/3925327 - will check HCal people
    • (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
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