BCAL Reconstruction Issues

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  1. BDT Work
    • Implement truth information; improve rejection of and understand origin of 'bad clusters'
  2. Simulation (mcsmear)
    • fADC timing: 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
    • Very low energy ADC hits coming from mcsmear
    • Bulk attenuation length vs short and long components (get atten length from ccdb)
  3. 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?
  4. 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
    • Determining cluster properties (E, x, y, z, t)
    • How to average cell-by-cell position to get cluster position
      • Weight averages by...? E? E^2? 1/sigma^2?
      • Average rectangular coordinates? Cylindrical? Spherical?
    • Energy corrections (z-dependent, non-linear)
      • Is current scheme good enough?
      • If so, write a plugin to automate this process.
      • Need extra special treatment of ends of calorimeter?
    • How to determine errors (and correlations) on cluster properties (important for kinematic fitting)
  5. Matching with tracks: get update from Simon/Paul
  6. 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?