BCAL Reconstruction Issues

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?