Quality A Assurance for the A e ALICE Silicon Strip rip - PowerPoint PPT Presentation

Quality A Assurance for the A e ALICE Silicon Strip rip Detectors O Or: Or: “AliHLTITSSSDQARec ecPointsComponent.cxx” Ingrid Kielen CERN Summer Student Programme 2009 1/9

Ali HLTITSSSDQARecPointsComponent ponent.cxx ALICE A Large Ion Collider Experiment Ingrid Kielen CERN Summer Student Programme 2009 2/9

AliHLT ITS SSDQARecPointsComponent ponent.cxx ITS Inner Tracking System Ingrid Kielen CERN Summer Student Programme 2009 3/9

AliHLTITS SSD QARecPointsComponent ponent.cxx SSD Silicon Strip Detector - Low ow momentum particle identification - Tra rack matching ITS-TPC Layer 5: r = 38 cm 34 ladders, 22 modules / ladder Layer 6: r = 43 cm 38 ladders, 25 modules / ladder 12 chips / module, 128 channels / chip: 2 608 128 channels in total Ingrid Kielen CERN Summer Student Programme 2009 4/9

AliHLTITSSSD QA RecPointsComponent ponent.cxx QA Quality Assurance -> Use the reconstructed spacepoints (RecPoints) -> Analyse relevant parameters (charge distribution, occupancy, etc) etc) -> Compare with reference data -> Infer the data quality Ingrid Kielen CERN Summer Student Programme 2009 5/9

Ali HLT ITSSSDQARecPointsComponent ponent.cxx HLT High Level Trigger HLT farm makes the last decisions ons in which data is kept and which is destroyed. Can we do QA at the HLT level = onl Can we do QA at the HLT level = onl online monitoring? online monitoring? HLT QA Raw data Online R RecPoints Offline Further reconstruction Simulation R RecPoints and analysis Ingrid Kielen CERN Summer Student Programme 2009 6/9

AliHLTITSSSDQA RecPointsCompone ent.cxx QARecPoints Component Quality Assurance at the HLT leve vel: RecPoints QARecPoints Histograms Raw data Finder Component in file This is where we are now. Ingrid Kielen CERN Summer Student Programme 2009 7/9

AliHLTITSSSDQARecPointsComponent ponent.cxx Cluster map: Shows RecPoints per module Charge distribution: Corresponds to energy deposit in silicon strips -> Landau distribution Ingrid Kielen CERN Summer Student Programme 2009 8/9

AliHLTITSSSDQARecPointsComponent ponent.cxx Conclusions / N / Next steps ng of data quality of the 5 th -> We want: Online monitoring of and 6 th detector layers (SSD) of A ALICE -> We have: “AliHLTITSSSDQA ARecPointsComponent” creates QA histograms from found ound RecPoints. -> We need: A way to quickly com ompare these histos with reference data and show the result ult to the user -> AMORE -> We won't be bored :-) Thank nk you Ingrid Kielen CERN Summer Student Programme 2009 9/9