TPC Online Monitoring Guide P Christiansen Lund Old
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TPC Online Monitoring Guide P. Christiansen (Lund) “Old” online monitors (/ RAW data monitors) Expert pad monitor Ali. EVE 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 1 Also GUI viewer is now working in AMORE Average cluster characteristics over many events TPC Online Monitoring Guide – P. Christiansen (Lund)
Current information (persistent for online mode) 2 NB! this is an average information for each pad. The monitor is only 2 d (pad+row), so there is NO time dependence! Max. Charge – Qmax Mean. Charge – Qtot Nlocal. Maxima – number of clusters NPads – pad width of cluster NTimebins – time width of cluster No. Threshold – fraction of digits above threshold (ZS reduction) Time. Position – 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 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 We can then study e. g. the gain (Qmax, Qtot) Integrated into AMORE online monitoring framework (Filimon and Marian) 3 This is a simplified version of the clustering implemented in Ali. TPCclusterer. MI Old version tested with online data New version tested with files on monitoring machine TPC Online Monitoring Guide – P. Christiansen (Lund)
RAW data QA: Cosmic data from December run, Qmax for A side 4 Output can be viewed (and manipulated!) in TPC calibration browser online TPC Online Monitoring Guide – P. Christiansen (Lund)
The noise (not shaped!) can be removed since also the mean number of timebins is available 5 TPC Online Monitoring Guide – P. Christiansen (Lund)
Qmax requiring mean time bins >2 6 TPC Online Monitoring Guide – P. Christiansen (Lund)
Qmax requiring mean time bins >3 7 TPC Online Monitoring Guide – P. Christiansen (Lund)
Q and Qmax plots with cuts 8 TPC Online Monitoring Guide – P. Christiansen (Lund)
RAW data QA: Krypton data (single clusters) from February in AMORE 9 Calibration browser (Ali. TPCCalib. Viewer. GUI) has been integrated in AMORE TPC Online Monitoring Guide – P. Christiansen (Lund)
How to use offline Expert pad monitor and Ali. EVE 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/test. Data. QA. C test. Data. QA(<filename>) NB! currently it runs the QA for both normal and fast reader, but this can easily be changed in the macro 10 TPC Online Monitoring Guide – P. Christiansen (Lund)
