Difference between revisions of "Transversity/Expert Checklist"
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== Run information == | == Run information == | ||
| − | # Check scaler rate screen, pre-scale factors agree with earlier runs. | + | # Check scaler rate screen, pre-scale factors agree with earlier runs. [http://www.jlab.org/~adaq/halog/html/0811_archive/081119003713.html example of normal rate @ 12uA prodction] |
# Check online CODA rate and CODA dead time. (Run scaler script, verify deadtime) | # Check online CODA rate and CODA dead time. (Run scaler script, verify deadtime) | ||
# Check start-of-run input. Target type, beam half wave plate, etc. | # Check start-of-run input. Target type, beam half wave plate, etc. | ||
Revision as of 21:51, 23 November 2008
Quick Links:
This is the check list for experts on transversity data checker shift.
Notice : Please add items of your specialty field, so every one will do the check
Contents
Beamline, beam charge, beam polarization, Luminosity monitors
- BPM A and B (x,) positions
- Happex charge feed back is On ?
- Beam charge asymmetry is below 100 ppm ? (Check end-of-run, and run Happex replay)
- Lumi signals and replay OK ?, no saturation ?.
- Beam charge at end-of-run make sense ?
Run information
- Check scaler rate screen, pre-scale factors agree with earlier runs. example of normal rate @ 12uA prodction
- Check online CODA rate and CODA dead time. (Run scaler script, verify deadtime)
- Check start-of-run input. Target type, beam half wave plate, etc.
- Happex run start ahead of transversity run ? (Happex run ends every four hours or so ?)
- Look at shift worker's run-sheet records.
- Confirm CODA not crashed, check DAQ-configuration: twoarm_RICH.
- Check Halog entries.
- Check if spin-flip is ON. Check target polarization history.
- Check all HV on. BB chamber HV on before run starts.
Replay
Run show_all(<run number>) script after shift worker finish a replay. It will pop up a set of plots for expert, which would take ~10min to check through.
A list of minimum check items : (Item / related online plots)
- Check left-HRS VDC efficiency / online("detectorL",run#)
- Check BB chamber wire map / online("detectorBB",run#)
- Check BB shower vs preshower ADC plot, threshold not changed / online("physics",run#)
- Check scaler consistency / online("scalar",run#)
- Spot++ / equavlent plots (raster current, BPMs) are included in online("detectorL",run#)
A list of known problems / possible bad runs
- BB chamber HV not on all the time.
- Left-arm VDC gas problem, low efficiency.
