EMC#
[QC on FLP - plot integrated over the run] Raw Data Error#
| Green: good quality | Red: bad quality |
|---|---|
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- If no entries, a green message "No Error: OK" inform you that everything is working properly.
- In case of errors, a red message will appear: call EMCAL oncall if EMCAL is included in global runs. Take note of the error-type in the y axis.
[QC on FLP - plot integrated over the run] Payload Size/events#
| good quality | bad quality | empty |
|---|---|---|
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- If "Data OK" is shown, everything is fine.
- If some of the DDL presents entries that are larger than the others, a red message will appears: please call EMCAL oncall.
- If the plot is empty, and EMCAL is included in the data taking, call EMCAL oncall.
[QC on FLP - plot integrated over the run] Bunch minimum amplitude EMCAL+DCAL#
| good quality | bad quality |
|---|---|
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- One peak should be visibile for all supermodules around 0 if EMCAL is in data taking.
- If the peak moves to the range 20-50 "Min raw amplitude (ADC)" for any supermodule, or a second peak appears for any supermodule in that range , call EMCAL oncall
- If the plot is empty, and EMCAL is included in the data taking: please call EMCAL oncall
[QC on EPN - plot integrated over the run] Cell Occupancy plots (PHYS) for E>0.2 GeV and E<0.2 GeV and Cell Occupancy plots (CALIB) for E>0.5 GeV#
| good quality (high-E) | good quality (high_E) | bad quaity |
|---|---|---|
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In case of good data the peak is at 0; if the plot is peaked at different values call EMC oncall
Occupancy plots: Acceptance losses#
| Missing acceptance (low-E) | Missing acceptance (high-E) |
|---|---|
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In case counts in a certain detector segment stop increasing the corresponding segment stops sending data. The corresponding area must be visible in both plots. - call EMCAL on-call
[QC on EPN - plot integrated over the run] Cell Amplitude#
- no instructions for the moment.
- If the plot is empty, and EMCAL is included in the data taking, call EMCAL oncall.
[QC on EPN - plot integrated over the run] Cell Time#
| good quality | bad quality |
|---|---|
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- We expect a gaussian peak roughly centred at 0 and a structure of single lines with a spacing of 100 ns from noisy channels. Depending on the filling scheme smaller gaussian like peaks from from pileup could appear. In such cases the data is OK.
- In case a second peak appears which is either of the same magnitude as the main peak or of magnitude 1/3 as the main peak and the peaks are separated by 100 ns call the EMCAL on-call
- If the main peak deviates from 0 by more than 100 ns call the EMCAL on-call
- If no gaussian like peak is present call the EMCAL on-call
- If the plot is empty, and EMCAL is included in the data taking, call EMCAL on-call.
Number of triggers per Time Frame#
| good quality | bad quality |
|---|---|
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| Trigger rate appox. const with minor fluctuations | Trigger rate dropping by several events / timeframe or to almost 0 |
The number of physics triggers per Time Frame must stay constant while the run is ongoing. In case the number of trigger decreases call the EMCAL on-call. The expected value will depend on the interaction rate and a checker will be implemented soon; for the moment check the "EMC KNOWN ISSUES" for the expected value under current conditions.
Known issues#
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Do not call EMC oncall during the night for QC plots related errors for non PHYSICS runs, unless a PHYSICS run is expected next.
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For the plot "Number of Physics triggers per timeframe" the expected value is currently approx 20. If value is below 15 for at least 2 consecutive timestamps, call on-call.
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Payload Size/Event can be ignored in all runs till further notice
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In plot "Raw data errors" (error rate) quality is bad if the rate is above 100 errors / minute for several minutes, and good if it is below.
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An empty region is expected near the bottom-right corner for CAL (Calibration) triggers.
