Calibration Train

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Processing Overview

Job Structure

Currently, two passes are planned: One automated step, and one to produce outputs for calibration procedures that are still manual.

The calibrations/plugins that are run on each pass are:

  • Pass 1
    • Run as many calibrations as possible on one file
    1. Pass 1: RF_online
    2. Pass 2: HLDetectorTiming,TOF_TDC_shift
    3. Pass 3: st_tw_corr_auto [don't commit]
    4. Pass 4: HLDetectorTiming, CDC_amp, BCAL_TDC_Timing [time offsets, need to update]
  • Pass 2
    • Process/skim full run
    • Calibrations: BCAL_attenlength_gainratio, BCAL_LEDonline, CDC_amp,CDC_TimeToDistance, FCALpedestals, FCALpulsepeak, FCAL_TimingOffsets, HLDetectorTiming, imaging, PSC_TW, PS_timing, pedestals,ST_Propagation_Time
    • EVIO skims: FCAL pi0, BCAL pi0, BCAL-LED, FCAL-LED, random, sync
    • ROOT skims: TOF_calib
    • Other [Monitoring]: BCAL_LED, BCAL_inv_mass, imaging, p2pi_hists, p3pi_hists
  • Incoming
    • Tagger/PS workflow
    • BCAL LED monitoring

Calibration run plan

The two priority items are to recalibrate the TOF with the its new running conditions and to verify calibrations with the new fADC250 firmware. All calibrations should be checked, in any case.

  1. Standalone calibrations (no forward tracking)
    • ✓ RF time (Paul M.)
    • Pedestals (System owners)
    • BCAL Attenuation length/gain ratio (Mark D.)
    • CDC time to distance (Mike S.)
    • CDC gain (Naomi)
    • ✓ SC timewalk (Mahmoud)
    • TOF timing (Offsets/timewalks) (Beni)
    • ✓ TAGM timing (Alex B.)
    • ✓ TAGH timing (Nathan)
    • ✓ PS timing (Nathan)
    • ✓ Overall timing (rough) (Mike S./Sean)
  2. Full tracking calibrations
    • ✓ BCAL Effective velocities (George)
    • ✓ Overall timing (Mike S./Sean)
    • ✓ SC Propagation time (Mahmoud)
  3. ✓ BCAL/FCAL pi0 calibrations (Adesh/Will M.)

All calibrations except the pi0 calibration should take no more than 1-3 2h runs of data.

Frequency

  • Timing will be checked for each run. The known variations are:
    • TOF (run-to-run)
    • Tagger (~<day, corrected in run-to-run in the spring)
  • CDC gains vary with temperature and pressure, can be averaged over a 1-2 hour run.

All other calibrations have been seen (so far) to be stable on a ~several week timescale

To-dos

  1. Finish skim improvements
  2. Automate constant -> CCDB pipeline
  3. Implement tracking database

Procedures

How to start a new run period

  1. Edit configuration file, e.g., $CALIBRATION_TRAIN/configs/data.config
    • Change job name to the current run period and set resource limits
  2. Edit $CALIBRATION_TRAIN/template/job_wrapper.sh
    • Set run period and version number
  3. Set up the files and directories
    • e.g. python setup_run.py configs/data.config
  4. Create workflows
    • swif create -workflow GXCalib-2017-01-pass1
    • swif create -workflow GXCalib-2017-01-pass2
  5. Launch pass1 jobs
    • python run_jobs_p1.py 2017-01 run_lists/f17.test

Calibration Outputs

RunPeriod-2017-01

Run Range Version tag Total # Jobs Notes Total Skim Size (TB) BCAL pi0 (GB) BCAL LED (GB) FCAL pi0 (GB) FCAL LED (GB) PS Skim (TB) TOF Skim (TB)
30274 - 30621 ver01 13362 11.2 338 74 862 147 6.36 1.63
30622 - 30959 ver02 13783 looser BCAL pi0 cuts 23.3 2379 131 1703 297 12.7 3.36
30960 - ver03 14869 looser BCAL pi0 cuts 13.4 1368 71 1000 142 7.47 1.99
  • Skim files can be found in the following directory: /cache/halld/RunPeriod-2017-01/calib/ver01
    • BCAL-LED - BCAL LED triggered events
    • BCAL_pi0 - BCAL pi0 candidates
    • FCAL-LED - FCAL LED triggered events
    • FCAL_pi0 - FCAL pi0 candidates
    • PS - PS triggered events
    • random - random (out-of-time) triggered events
    • sync - TS sync events
    • TOF - TOF calibration ROOT skim