Offline Monitoring Data Validation
This page contains the procedure for checking if production runs are of good quality and can be used for physics analysis.
Contents
Run Periods
- RunPeriod-2016-02 Validation
- RunPeriod-2016-10 Validation
- RunPeriod-2017-01 Validation
- RunPeriod-2018-01 Validation
- RunPeriod-2018-08 Validation
- RunPeriod-2019-01 Validation
- RunPeriod-2019-11 Validation
Procedure
For each production run, do the following:
- Go to the | Offline Run Browser page.
- Follow the steps outlined in the checklist below.
- Worker should check each plot and add notes if
- Certify that each section is okay
Expert Actions
- Set run status in RCDB based on monitoring results
- (script provided)
Run Statuses
- -1 - unchecked
- 0 - rejected (not physics-quality)
- 1 - approved
- 2 - approved long/"mode 8" data
- 3 - calibration / systematic studies
Checklist
Example Monitoring Spreadsheet
Reference run for 2017-01: 30780
Reference run for 2018-01: 40933/4
Reference run for 2018-08: 51388
Reference run for 2019-11: 71724 (150 nA), 71469 (250 nA), 71463 (350 nA) [for now!]
General Notes
- Diamond and amorphous (AMO) runs have different beam energy spectra, which leads differences in reaction yields distributions which depend on the kinematics of the produced particles.
BCAL
- Check Occupancy - Reference: [ link ]
- Check Hit Efficiency - Reference: [ link ]
- Check Recon. BCAL 1 - Reference: [ link ]
- Check Recon. BCAL 2 - Reference: [ link ]
- Check BCAL Matching - Reference: [ link ]
BCAL Notes
The BCAL is used to measure the energy and time of showers.
The energy is vital for the neutrals. But it’s also used for charged particles to do PID.
BCAL Matching: These plots are for charged particles that are tracked in the drift chambers and projected to the BCAL. The z position along the BCAL can be calculated using the time difference between upstream and downstream hits and compared to the extrapolated position using the drift chambers.
BCAL/Track Delta z = (z determined from time of up - down hits in BCAL) - (z determined from the extrapolation of tracks in the drift chambers)
projected BCAL Hit-Z = z determined by extrapolating tracks in the drift chambers to the BCAL.
The match rate is the ratio of (number of hits in the BCAL that match the extrapolation of tracks in the drift chamber) / (number of tracks in the drift chamber that point at the BCAL).
CDC
- Check Occupancy - Reference: [ link ]
- Check Time-to-distance - Reference: [ link ]
- Check dE/dx - Reference: [ link ]
- Check Efficiency- Reference: [ link ]
CDC Notes
CDC Occupancy: There should be a uniform decrease in intensity from the center of the detector outward. Random white cells scattered throughout occur when not enough data were collected, eg empty target runs, trigger tests or no beam. Several contiguous white, dark blue or bright yellow cells which don't match the neighboring cells are a problem.
Time-to-distance: 𝛿, the change in length of the LOCA caused by the straw deformation, is
plotted against the measured drift time, t drift . The color scale indicates the distance of
closest approach between the track and the wire, obtained from the tracking software.
The red lines are contours of the time-to-distance function for constant drift distances
from 1.5 mm to 8 mm, in steps of 0.5 mm. They should lie over the top of the dark blue contour lines separating the colour blocks.
For the plot of residuals vs drift time, the mean should be less than 5um and the sigma should be less than 180um.
dE/dx: At 0.5GeV/c the fitted peak means should be within 1% of 2.02 and 6.34 keV/cm, and at 1.5GeV/c the peak mean should be within 1% of 2.21 keV/cm.
Efficiency: The efficiency should be 0.98 or higher at 0cm DOCA, gradually fall to 0.97 at approximately 0.5mm and then more steeply through 0.9 at approximately 0.64cm.
FCAL
- Check Occupancy - Reference: [ link ]
- Check FCAL Hits 1 - Reference: [ link ]
- Check FCAL Hits 2 - Reference: [ link ]
- Check FCAL Clusters 1 - Reference: [ link ]
- Check FCAL Recon. 1 - Reference: [ link ]
- Check FCAL Recon. 2 - Reference: [ link ]
- Check Recon. FCAL Matching - Reference: [ link ]
FCAL Notes
Is used for neutral particle detection and pion identification.
FDC
- Check Package 1 Occupancy - Reference: [ link ]
- Check Package 2 Occupancy - Reference: [ link ]
- Check Package 3 Occupancy - Reference: [ link ]
- Check Package 4 Occupancy - Reference: [ link ]
FDC Notes
PS
PS Notes
SC
- Check Occupancy - Reference: [ link ]
- Check Recon. SC 1 - Reference: [ link ]
- Check Recon. SC 2 - Reference: [ link ]
- Check Recon. SC Matching - Reference: [ link ]
SC Notes
TAGH
TAGH Notes
TAGM
TAGM Notes
TOF
- Check Occupancy - Reference: [ link ]
- Check TOF Matching 1 - Reference: [ link ]
- Check TOF Matching 2 - Reference: [ link ]
TOF Notes
RF
- Check timing offsets - Reference: [ link ]
- Should be centered around zero
Timing
- Check Calorimeter Timing - Reference: [ link ]
- Check Drift Chamber Timing - Reference: [ link ]
- Check PID System Timing - Reference: [ link ]
- Check Tagger Timing - Reference: [ link ]
- Check Track Matched Timing - Reference: [ link ]
- Check Tagger/RF Timing - Reference: [ link ]
- Check Tagger/SC Timing - Reference: [ link ]
Timing Notes
Analysis
- Tracking 1 - [ link ]
- Tracking 3 - [ link ]
- Check BCAL pi0 - Reference: [ link ]
- Check BCAL/FCAL pi0 - Reference: [ link ]
- Check p+2pi - Reference: [ link ]
- Check p+3pi - Reference: [ link ]
- Check p+pi0g - Reference: [ link ]
Analysis Notes