CALORIMETER DATA QUALITY PAGE

Laurent Duflot
Viatcheslav Shary

Here the data quality monitoring package description == calorimeter examine (to be written).

Here the page devoted to the "Ring of fire" noise in calorimeter.

To use "Kill bad cells" correction follow the instruction.


Documentation:
  1. Cell monitoring tool note (6.3M). The gzip version (780k) is here.
  2. Talk on calgo meeting 23-Sep-2003: Removing bad cells offline: first jet results
  3. Beaune workshop transparencies (June 2003): html version; power point, 3.0M.



Following lists contain the calorimeter quality for analyzed runs:

RUNS GOOD RUNS BAD RUNS UNKNOWN RUNS
TXT, run number only TXT, run number only TXT, run number only TXT, run number only



The current quality criteria for runs are VERSION 5:
  1. If percentage of noisy events > 10.00 the run quality is BAD.
  2. else if number of cells with mean energy out of limits > 24 the run quality is BAD.
  3. else if number of ZERO_BIAS events in the run < 200 the run quality is UNKNOWN.
  4. else if number of towers without signal > 8 the run quality is BAD.
  5. else if number of towers without signal > 0 the run quality is REASONABLE.
  6. else if number of BAD towers > 0 the run quality is REASONABLE.
  7. else if percentage of noisy events > 8.00 the run quality is REASONABLE.
  8. else the run quality is GOOD.
Events are declared "NOISY" by cal_event_quality package using "ring of fire", "coherent noise" and "missing crate" criteria.

Now the limits for the cells mean energy are -1.0 - 1.5 GeV for the not coarse hadronic cells and -2.0 - 2.5 GeV for the coarse hadronic cell.

The tower is "bad" if number of cells out of energy limits per EM or hadronic tower more or equal than 3 OR
mean occupancy per cell in tower more than 30% (50% per towers with abs(ieta) > 32) AND tower mean energy out of limits: -0.75 - 0.75 GeV.

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