Difference between revisions of "BCAL Reconstruction Issues"

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** When determining energy, give more weight to higher energy hit? (also in averaging time?)
 
** When determining energy, give more weight to higher energy hit? (also in averaging time?)
 
** Best way to determine sigma_z?
 
** Best way to determine sigma_z?
 +
** How to deal with multiple hits in same channel?
 
* Clustering
 
* Clustering
 
** Use only timing information from fADCs?
 
** Use only timing information from fADCs?
 
*** If we use TDC info also, we need to appropriately make use of the different timing errors of different hits
 
*** If we use TDC info also, we need to appropriately make use of the different timing errors of different hits

Revision as of 20:00, 28 March 2013

  • Simulation (mcsmear)
    • fADC timing
      • Uses threshold crossing time rather than FPGA-ish algorithm
      • Resolution is too poor
    • mcsmear doesn't seem to smear data enough
      • TDC timing resolution is too good
      • single photo-electron peaks in energy spectrum
    • spikes in time histogram at low energy
    • max ADC amplitude (12 bits?)
    • Sampling fluctuations not applied on per-particle basis
  • Timewalk corrections
    • Establish procedure for doing these corrections based on simulated data (how closely should this match the correction procedure for real data?)
    • Determine form of timewalk corrections
    • What if we have TDC info only on one end?
  • DBCALPoint (reconstructing E,z,t from double-ended hit)
    • When determining energy, give more weight to higher energy hit? (also in averaging time?)
    • Best way to determine sigma_z?
    • How to deal with multiple hits in same channel?
  • Clustering
    • Use only timing information from fADCs?
      • If we use TDC info also, we need to appropriately make use of the different timing errors of different hits