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

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quality a assurance for the a e alice silicon strip rip
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Quality A Assurance for the A e ALICE Silicon Strip rip - - PowerPoint PPT Presentation

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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

slide-1
SLIDE 1

Quality A for the A Silicon Strip

O “AliHLTITSSSDQARec

Ingrid Kielen 1/9

Assurance e ALICE rip Detectors

Or: Or: ecPointsComponent.cxx”

CERN Summer Student Programme 2009

slide-2
SLIDE 2

AliHLTITSSSDQARecPointsComponent

Ingrid Kielen 2/9

ALICE

ponent.cxx A Large Ion Collider Experiment

CERN Summer Student Programme 2009

slide-3
SLIDE 3

AliHLTITSSSDQARecPointsComponent

Ingrid Kielen 3/9

ITS

ponent.cxx Inner Tracking System

CERN Summer Student Programme 2009

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SLIDE 4

AliHLTITSSSDQARecPointsComponent

  • Low
  • Tra

Ingrid Kielen 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 4/9

SSD

ponent.cxx Silicon Strip Detector

  • w momentum particle identification

rack matching ITS-TPC CERN Summer Student Programme 2009

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SLIDE 5

AliHLTITSSSDQARecPointsComponent

Ingrid Kielen 5/9

QA

ponent.cxx Quality Assurance

  • > Use the reconstructed

spacepoints (RecPoints)

  • > Analyse relevant parameters

(charge distribution, occupancy, etc) CERN Summer Student Programme 2009 etc)

  • > Compare with reference data
  • > Infer the data quality
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SLIDE 6

AliHLTITSSSDQARecPointsComponent Can we do QA at the HLT level = onl HLT farm makes the last decisions which is destroyed.

Ingrid Kielen

Can we do QA at the HLT level = onl Online Offline

Raw data Simulation

R R

6/9

HLT

ponent.cxx High Level Trigger

  • nline monitoring?
  • ns in which data is kept and

CERN Summer Student Programme 2009

  • nline monitoring?

RecPoints RecPoints Further reconstruction and analysis

HLT QA

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SLIDE 7

Quality Assurance at the HLT leve AliHLTITSSSDQARecPointsCompone This is where we are now.

RecPoints Finder Ingrid Kielen Raw data 7/9

vel:

QARecPoints Component

ent.cxx

QARecPoints Component Histograms in file CERN Summer Student Programme 2009

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SLIDE 8

AliHLTITSSSDQARecPointsComponent

Ingrid Kielen 8/9

ponent.cxx Cluster map: Shows

RecPoints per module

Charge distribution:

Corresponds to energy deposit in silicon strips -> Landau distribution CERN Summer Student Programme 2009

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SLIDE 9
  • > We want: Online monitoring of

and 6th detector layers (SSD) of A

  • > We have: “AliHLTITSSSDQA

creates QA histograms from found

Conclusions / N

AliHLTITSSSDQARecPointsComponent

Thank

Ingrid Kielen

  • > We need: A way to quickly com

reference data and show the result

  • > We won't be bored :-)

9/9

ng of data quality of the 5th ALICE ARecPointsComponent”

  • und RecPoints.

/ Next steps

ponent.cxx

nk you

CERN Summer Student Programme 2009

  • mpare these histos with

ult to the user -> AMORE