TPC TimeSeries: propagate min-momentum, min-cluster, max-tgl to workflow

[miranov25]

Add configurable environment variables for o2-tpc-time-series-workflow:
TPCTIMESERIES_MIN_MOMENTUM (default: 0.2)
TPCTIMESERIES_MIN_CLUSTER (default: 80)
TPCTIMESERIES_MAX_TGL (default: 1.4)

Defaults match TPCTimeSeriesSpec.cxx hardcoded values. Previously these cuts were not configurable from the workflow script.

[miranov25]

Hello @shahor02, @marslandALICE, @matthias-kleiner, and @catalinristea,

Here is the pull request needed for O2 to set parameters for the low-gain calibration.

We need it as a technical fix and will keep the old default values.

[miranov25]

Analyzing the output of the latest test production – changing dEddxRation cut – we found another problem in the multiplicity selection.

We introduced multiplicity binning in the time series, but by mistake applied the same multiplicity cut not only for the time series binning, but also for the track selection.

The default value of the cut, 50000, does not allow us to perform studies at extreme occupancies.

To address this, we will need to modify the source code.
I will update the pull request.
Should we first make the value parametrizable from the jdl, or is it better to directly fix the source code?

[alcaliva]

Hi @sawenzel, if you agree, could you please have a look at this one and if your are satisfied merge it? Thanks!

[alcaliva]

Hi @sawenzel, if you agree, could you please have a look at this one and if your are satisfied merge it? Thanks!

[shahor02]

Please don't merge it yet, one more correction is needed for the time-series.

[miranov25]

Hello @shahor02,

I added an option to change the parameter:

• CONFIG_TPCTIMESERIES+=" --mult-max ${TPCTIMESERIES_MULT_MAX}"

I was hesitant to change the code (the better solution); I will only do that after testing at GSI.