Mattione Update 05072012
From GlueXWiki
Track Candidate Reconstruction Sampling
- All events have one π+ thrown at p = 150 MeV/c, θ = 90 degrees, φ = random.
- These are identical to those presented at the 04/25/2012 Tracking Software meeting.
| Event # | Hits (CDC & Truth) | Current (04/08/12) Code Track Candidates | Spiral Code Track Candidates |
|---|---|---|---|
| Event 1 |  |
 |
 |
| Event 2 |  |
 |
 |
| Event 3 |  |
 |
 |
| Event 294 |  |
 |
 |
Spiral Fitting - Histograms
- Improvements from last time (04/25/2012):
- Changed track candidate algorithm structure (removes memory explosion & slow reconstruction): Decreased %events with no track candidates from ~12% to ~4%.
- Upgraded to newest Kalman Filter code (includes fix for broken tracks) (also decreased minimum pion momentum from 150 to 50 MeV/c): Decreased %events with no time-based tracks from ~75% to ~45%.
- Truncated track stepping once track turns back inwards towards the target (Δr < 0.0 bounds check in DTrackFitterKalmanSIMD::SetCDCReferenceTrajectory()): Decreased %events with no time-based tracks from ~45% to ~28%.
- Note: no changes have been checked into svn yet.
- # Reconstructed Tracks / Event:
- NOTE: Hit selectors disabled for wire based & time based fits, except for "SVN Code": instead use hits from track candidates (and ignore hits after spiral turn back inwards)
