1 TPC Online Monitoring Guide – P. Christiansen (Lund) TPC Online Monitoring Guide P. Christiansen (Lund) “Old” online monitors (/ RAW data monitors) 

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Presentation transcript:

1 TPC Online Monitoring Guide – P. Christiansen (Lund) TPC Online Monitoring Guide P. Christiansen (Lund) “Old” online monitors (/ RAW data monitors)  Expert pad monitor  AliEVE event display  Single events  No cluster information: only “digits” ALICE QA framework supports online monitoring via AMORE  New QA RAW monitor based on GSI TPC calibration framework with simple clustering  Integrates with GUI viewer Also GUI viewer is now working in AMORE  Average cluster characteristics over many events

2 TPC Online Monitoring Guide – P. Christiansen (Lund) Current information (persistent for online mode) NB! this is an average information for each pad. The monitor is only 2d (pad+row), so there is NO time dependence! MaxCharge – Qmax MeanCharge – Qtot NlocalMaxima – number of clusters NPads – pad width of cluster NTimebins – time width of cluster NoThreshold – fraction of digits above threshold (ZS reduction) TimePosition – mean Z position of clusters Other variables can be added, BUT there is an online memory limit on the number of variables so 1 new variable means that 1 old has to disappear

3 TPC Online Monitoring Guide – P. Christiansen (Lund) The RAW data QA Updated February/March 2008 Simple clustering implemented to have access to cluster characteristics  Raw data are expanded sector by sector in memory  Local extrema are identified This is a simplified version of the clustering implemented in AliTPCclustererMI  We can then study e.g. the gain (Qmax, Qtot) Integrated into AMORE online monitoring framework (Filimon and Marian)  Old version tested with online data  New version tested with files on monitoring machine

4 TPC Online Monitoring Guide – P. Christiansen (Lund) RAW data QA: Cosmic data from December run, Qmax for A side Output can be viewed (and manipulated!) in TPC calibration browser online

5 TPC Online Monitoring Guide – P. Christiansen (Lund) The noise (not shaped!) can be removed since also the mean number of timebins is available

6 TPC Online Monitoring Guide – P. Christiansen (Lund) Qmax requiring mean time bins >2

7 TPC Online Monitoring Guide – P. Christiansen (Lund) Qmax requiring mean time bins >3

8 TPC Online Monitoring Guide – P. Christiansen (Lund) Q and Qmax plots with cuts

9 TPC Online Monitoring Guide – P. Christiansen (Lund) RAW data QA: Krypton data (single clusters) from February in AMORE Calibration browser (AliTPCCalibViewerGUI) has been integrated in AMORE

10 TPC Online Monitoring Guide – P. Christiansen (Lund) How to use offline Expert pad monitor and AliEVE are documented in:  TPC shift guide  TPC offline manual: $ALICE_ROOT/TPC/doc/offline/ QA RAW monitor in standalone  In aliroot do: .L $ALICE_ROOT/TPC/macros/testDataQA.C  testDataQA( )  NB! currently it runs the QA for both normal and fast reader, but this can easily be changed in the macro