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FIT-FT0#

FT0: General#

All QC plots are generated in 5 min. cycles. The histogram contents are reseted after each cycle. Please wait at least 10 min. from the start of the RUN to judge about the quality of collected data.

If a non-critical (i.e. expendable) QC task fails, please add a bookkeeping entry about it.

FT0: Quality summary#

ft0_summary_and_trend_bad

The left panel summarizes all FT0 checks for the last QC cycle of the selected run. The top part shows a global aggregated quality with a text message suggesting actions for the QC shifter:

  • Quality: Bad: Inform the FIT on-call immediately
  • Quality: Medium: Follow individual check instructions
  • Quality: Good: All checks are OK
  • Quality: NULL: Some histograms are empty, inform the FIT on-call immediately

The bottom part of the summary shows individual check results and reasons for qualities Bad, Medium and NULL.

The right panel shows a time trend of the global quality for the selected run.

FT0: Out of bunch collisions#

[QC on EPN/QC nodes - plot integrated over the QC cycle]

ft0_bc_triggers

BC vs trigger correlation for the events which were detected but are not aligned (out-of-bunch) with LHC filling scheme. The number of out-of-bunch events depends on the trigger settings. The check is performed for the Vertex trigger.

Actions:

  • If WARNING - Add bookkeeping entry (once per run).
  • If ERROR - call FIT-on-call.

FT0: Fraction of events with CFD in ADC gate#

[QC on EPN/QC nodes - plot integrated over the QC cycle]

ft0_cfd_efficiency

Fraction of events with CFD in ADC gate in each detector channel. Horizontal lines show the levels below which the warnings/errors are raised.

Actions:

  • If WARNING - Add bookkeeping entry (once per run).
  • If ERROR - call FIT-on-call.

FT0: Fraction of events with the CFD in time gate#

[QC on EPN/QC nodes - plot integrated over the QC cycle]

ft0_cfd_gate

Fraction of events with CFD in time gate in each detector channel. Horizontal lines show the levels below which the warnings/errors are raised.

Actions:

  • If WARNING - Add bookkeeping entry (once per run).
  • If ERROR - call FIT-on-call.

FT0: Fraction of channels out of colliding BCs#

[QC on EPN/QC nodes - plot integrated over the QC cycle]

ft0_channel_out_of_bunch

Fraction of channles fired out of colliding BCs. Horizontal lines show the levels below which the warnings/errors are raised.

Actions:

  • If WARNING - Add bookkeeping entry (once per run).
  • If ERROR - call FIT-on-call.

FT0: Validation of hardware (HW) triggers in software (SW)#

[QC on EPN/QC nodes - plot integrated over the QC cycle]

ft0_trg_validation

Fraction of only software or hardware (SW + HW) triggers. In ideal case both the FW and SW triggers or nighther of them should be present in a given event. Horizontal lines show the levels below which the warnings/errors are raised.

Actions:

  • If WARNING - Add bookkeeping entry (once per run).
  • If ERROR - call FIT-on-call.

Known issues#

  • channels 60-63 (FT0A side) are OFF in PHYSICS and COSMICS runs
  • channels 139 and 176-179 (FT0C side) are OFF in PHYSICS and COSMICS runs