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Default Analyses in MarlinTPC [message #1459] Fri, 02 May 2008 05:59
Messages: 125
Registered: July 2005
Location: CERN
I would like to discuss which default analysis processors should be available for the large prototype (LP) TPC.

Currently available (MarlinTPC r1076):
  • BiasedResidualsProcessor
    Distribution of residuals wrt. track where all hits are included in track fit. Works for straight tracks and helices.
  • HitAndTrackChargeProcessor
    Histograms of charge per hit, charge per track and charge per track length.
  • LinearGeometricMeanResoutionProcessor
    Calculate residuals with the test hit included and excluded from the track fit. Implementation for straight lines using linear regression.
  • LinearThreePointResolutionProcessor
    Calculate residuals using the three-point method. Implementation for straight lines.
  • TimePixClusterSizeProcessor
    Size of clusters (number of pixels and cluster radius) on the TimePix chip
  • TimePixOccupancyProcessor
    Count how many times a pixel has been hit on the TimePix chip
  • TimePixTOTDistributionProcessor
    Distribution of TOT values of all pixels on the TimePix
  • XYZDistrubutionProcessor
    Distributions of reconstructed x, y, and z coordinate of all hits in an event
  • XYZDistrubutionProcessor
    Distributions of reconstructed x, y, and z coordinate of hits on tracks

Also needed:
  • ResidualsReferenceTrackProcessor
    Distribution of residuals wrt. reference track
  • PadOccupancyProcessor

The geometric mean processor should be extended to helix tracks (lower priority since this method is time consuming. The biased residuals are ok for long tracks with many hits and can be corrected by sqrt( nHits / (nHits - nDoF) ) ).

What else is missing?

Martin Killenberg

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