Difference: VeloMoniWishList (6 vs. 7)

Revision 72008-07-21 - ChrisParkes

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META TOPICPARENT name="VELOCommissioningSoftware"

VELO Online Monitoring Wish List

This page is meant to be a scratch area for collecting ideas what to monitor and how. So everybody should feel free to add
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Detailed Specifications

Higher level quantities
Alignment/Resolution (Marco, Silvia)
  • residuals (preferably for small angle tracks with many spacepoints)
    • vs r/phi for alignment
      • for each sensor make unbiased straight line track fit and compute intercept with sensor
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      • for each bin in pitch+angle fit the spread of the residual distribution
      • the fit should only be done for bins with at least 10000 entries
      • it has to be noted that extrapolation errors contribute to the measured spread!
      • projections of resolution (spread) vs pitch/angle can be plotted for various bins in the other variable using colour-coded lines (see Tomasz's plots)
      • projections of resolution (spread) vs pitch/angle can be plotted for various bins in the other variable using colour-coded lines (see Tomasz's LHCb note plots)
      • residual plots should not be updated too often to ensure necessary statistics, hence update frequency: (>)>=10min
TELL1 Algorithm Monitoring, require NZS data (Tomasz, Chris)
Aim: monitor performance of TELL1 algorithms / check current algorithm parameter values suitable A separate set of plots are used to tune the parameter values (from the Vetra computers) which are not described here.

  • Algorithm:Pedestal Subtraction - Histo 1: mean ADC counts after pedestal subtraction versus chip channel.
  • Algorithm:FIR Filter - Histo 1: parameters of cross-talk computer run on data that has already been corrected.
  • Algorithm:Beetle Header Correction - Histo1: parameters of beetle correction run on data that has already been corrected, Histo2: corrected rms noise of 1st and 2nd channel of each analogue link / CM corrected rms noise of average channel in same link.
  • Algorithm:MCMS Correction - Histo1: noise (rms ADC values) versus chip channel after correction. Histo 2: to be defined something to specifically check events with large baseline swings (JC, Gwen looking)
  • Algorithm:Common Mode Correction - Histo1:noise (rms ADC values) versus strip number after correction. Histo2: profile plot of value of correction applied versus strip number.
  • Algorithm: Cluster Maker- Histo1: Number of clusters versus central strip number (and number with spillover bit set superimposed). Histo2: Size of clusters versus central strip number. Histo 3: Landau (sum of ADC). Histo4: Signal/Noise.


Quantities derived from NZS Data
  • noise before/after common mode
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