Offline Software Progress since 2005
From GlueXWiki
List of items for Curtis's PAC report.
CM's original list
from his email:
Example:
Offline Reconstriction:
Full reconstruction now possible.
Tracking via Runge-Kutta fits and via Kalmann Filter.
Calorimeter Reconstruction works.
Global Event reconstruction works.
Areas of work: Hadronic Split offs, PID, ....
Collected Ideas
Since the 2006 PAC presentation significant progress has been made on the offline software including:
- GEANT-based ab initio simulation has been refined and used for numerous MC studies that have led to improvements in the detector design. Improvements include:
- Realistic detector resolutions
- Inclusion of EM background generation
- Realistic threshold and dark rate values for calorimeter reconstruction
- Realistic, position dependent drift time resolution based on CDC prototype data
- Lorentz deflection of avalanche position on FDC wires (GARFIELD calculation)
- Double hit merging
- PYTHIA-based event generator for realistic hadronic background simulation
- MCFAST-based parametric simulation replaced with HDParSim that incorporated resolutions and efficiencies derived from GEANT-based simulation and full reconstruction
- Better simulation of backgrounds led to more accurate determination of event size (increased by factor of 3!)
- Full event reconstruction using simulated data. Having a full reconstruction package in place allows us to:
- Identify issues not often identified prior to data taking (e.g. hadronic splitoffs in high multiplicity events)
- Better estimate compute resources that will be required for offline analysis
- PWA software development using GPUs
- Kinematic fitting package that was developed outside of GlueX integrated into our source repository
- Kaman filter based charged particle tracking
- Multi-threaded event processing framework
