Home > Community > Attività di ricerca > Gruppo 3 > ALICE > Hardware > ALICE SSD > Detector Commissioning Detector Commissioning - Part 5 Versione stampabile Detector Quality Assurance - Part 1General Information - 1During this run the ZS threshold was set to 3σ.RUNTrigger SequenceTrigger ModeFrequencyEvents55635L2aBC4000 Hz180055633L2aBC40 Hz117755634L2aBC400 Hz3317The reconstruction was performed with AliRoot v4-14-Release. The official OCDB files were used from AliEn. These files were produced from previous calibration runs.The analysis of the SSD clusters revealed that we have the following number of golden clusters over all the events for the two runs:RUNLayer 5Layer 65563510252238155633283637556347561728Results from the run 55633Number of clusters per module/number of events [%]Module number with clustersLocal coordinates x-y-zGlobal coordinates x-y-zCluster type - Charge ratio - Cluster chargeCluster charge (P-Side) - Cluster charge (N-Side) - qN/qPCluster charge map - Cluster charge correlationResults from the run 55634Number of clusters per module/number of events [%]Module number with clustersLocal coordinates x-y-zGlobal coordinates x-y-zCluster type - Charge ratio - Cluster chargeCluster charge (P-Side) - Cluster charge (N-Side) - qN/qPCluster charge map - Cluster charge correlationResults from the run 55635Number of clusters per module/number of events [%]Module number with clustersLocal coordinates x-y-zGlobal coordinates x-y-zCluster type - Charge ratio - Cluster chargeCluster charge (P-Side) - Cluster charge (N-Side) - qN/qPCluster charge map - Cluster charge correlationFrequency distribution points per module/per event (golden points only)There is kind of an exponential distribution. About 90% of the modules have no points (as it should be)!I also looked at x,y distributions in modules. In many cases, most hits are again at 1 or two strips in a module. So it seems that by masking out a limited number of strips, we could clean up this distribution. The question is whether this set of strips is stable in time.It would be interesting to look for non-gaussian tails in pedestal runs.General Information - 2During this run the ZS threshold was set to 3.6σ.RUNTrigger SequenceTrigger ModeFrequencyEvents56288L2aBC4000 Hz150256286L2aBC40 Hz100756287L2aBC400 Hz1056The reconstruction was performed with AliRoot v4-14-Release. The official OCDB files were used from AliEn These files were produced from previous calibration runs.The analysis of the SSD clusters revealed that we have the following number of golden clusters over all the events for the two runs:RUNLayer 5Layer 656288513680562869821562874622Results from the run 56286Number of clusters per module/number of events [%]Module number with clustersLocal coordinates x-y-zGlobal coordinates x-y-zCluster type - Charge ratio - Cluster chargeCluster charge (P-Side) - Cluster charge (N-Side) - qN/qPCluster charge map - Cluster charge correlationResults from the run 56287Number of clusters per module/number of events [%]Module number with clustersLocal coordinates x-y-zGlobal coordinates x-y-zCluster type - Charge ratio - Cluster chargeCluster charge (P-Side) - Cluster charge (N-Side) - qN/qPCluster charge map - Cluster charge correlationResults from the run 56288Number of clusters per module/number of events [%]Module number with clustersLocal coordinates x-y-zGlobal coordinates x-y-zCluster type - Charge ratio - Cluster chargeCluster charge (P-Side) - Cluster charge (N-Side) - qN/qPCluster charge map - Cluster charge correlation
