EMC#
Don't call EMC expert during the night if run is not physics
[QC on FLP - plot integrated over the run] Error Type for SM (Super Module)#
| 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] 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 | bad quality (superMod not sending data) | bad quaity (superMod noisy) |
|---|---|---|
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Cell Occ. with E>0.2 GeV: the occupancy plots should be uniformly filled during Cosmics runs.
- if something noisy appears, please call the EMCAL oncall.
- If the plot is empty, and EMCAL is included in the data taking, call EMCAL oncall.
Cell Occupancy plots with E>0.5 GeV (CAL)
- if some large empty areas (expect for the PHOS hole, present in the example for Cell Occ. with E<0.2 GeV) appear, please call EMCAL oncall.
[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.
- If peaks appear but the text in histogram is okay, That's a problem due to bad channel. send a message to EMCAL expert via mattermost.
[QC on EPN - plot integrated over the run] Cell Time#
- If the plot is empty, and EMCAL is included in the data taking, call EMCAL oncall. If the errors appear during nigh shift:
- add a note in the logbook, don't call the on-call.
- in case LHC is preparing for collisions the on-call should be notified at "Prepare Ramp" (even during the night in this case) in case of such errors occur in a technical run before, so that the cards can be recovered before taking physics data.
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 (for technical and cosmics runs not during the night). The correct value will depend on the interaction rate and a checker will be implemented soon; for the moment please inform the oncall on case of changes during the run.
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.
