Difference between revisions of "Transversity/Expert Checklist"
From Hall A Wiki
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== Beamline, beam charge, beam polarization, Luminosity monitors == | == Beamline, beam charge, beam polarization, Luminosity monitors == | ||
| − | # | + | # BPM A and B (x,) positions |
# Happex charge feed back is On ? | # Happex charge feed back is On ? | ||
# Beam charge asymmetry is below 100 ppm ? (Check end-of-run, and run Happex replay) | # Beam charge asymmetry is below 100 ppm ? (Check end-of-run, and run Happex replay) | ||
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# Check BB shower vs preshower ADC plot, threshold not changed / {{pass|online("physics",run#)}} | # Check BB shower vs preshower ADC plot, threshold not changed / {{pass|online("physics",run#)}} | ||
# Check scaler consistency / {{pass|online("scalar",run#)}} | # Check scaler consistency / {{pass|online("scalar",run#)}} | ||
| − | # Spot++ | + | # Spot++ / {{pass|equavlent plots (raster current, BPMs) are included in online("detectorL",run#)}} |
== A list of known problems / possible bad runs == | == A list of known problems / possible bad runs == | ||
Revision as of 21:29, 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.
- 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.
