CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al. Sebastian Fleischmann, Bergische Universität Wuppertal, Germany Tatjana Lenz, Bergische Universität Wuppertal, Germany Andreas Salzburger , CERN PH-ATC & University of Innsbruck, Austria Andreas Wildauer, CERN PH-ATC & University of Innsbruck, Austria fast atlas tRack simulati new
13
Embed
Sebastian Fleischmann , Bergische Universität Wuppertal, Germany
new. f a st atlas t R a ck s imulation. Sebastian Fleischmann , Bergische Universität Wuppertal, Germany Tatjana Lenz, Bergische Universität Wuppertal, Germany Andreas Salzburger , CERN PH-ATC & University of Innsbruck, Austria - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al.
Sebastian Fleischmann, Bergische Universität Wuppertal, GermanyTatjana Lenz, Bergische Universität Wuppertal, GermanyAndreas Salzburger, CERN PH-ATC & University of Innsbruck, AustriaAndreas Wildauer, CERN PH-ATC & University of Innsbruck, Austria
fast atlas tRack simulationnew
CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al.
OutlineOutline
• ATLAS Detector and Tracking devices
• What’s behind Fatras - the new ATLAS offline Tracking software:
Extrapolation package, Reconstruction geometry
• Material budget + Material effects - comparison with full simulation geometry
Full Detector Simulation interaction with detector material,
hit creation/particle decay
Geant4, FLUKA, …
Digitizationsingal + noise creation
Event Data Preparation
Track Finding
Track Fitting
Fast Detector Simulation
parametric smearingof track parameters according
to obtained smearingfunctions
EDM
EDM
ATLFAST
Analysis, Data Persistency, Event Visualization
Event Data Preparation
EDM
Trajectory CreationEDM
Track/Noise CreationEDM
Track Finding
Track Fitting
EDM
EDM
uses the Extrapolation Tooland Geometry of Reconstrucion
uses the Fitting/Data preparation Tools of Reconstrucion
Simulation
CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al.
behindbehind
• the new fast track simulation is a spin-off of the development of the new ATLAS offline Tracking (i.e. track reconstruction) development: - very modular design (dedicated Tools and Algorithms) - dynamically loading of libraries (Interfaces) - configuration via python steering
• main component of Fatras is the newly developed track Extrapolation engine (with navigation)
• Fatras is using the reconstruction geometry as a simulation geometry (enhances navigation) • Fatras acts completely on the offline track reconstruction Event Data Model (EDM)
1 … n
Trajectory
CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al.
• the prediction of the trajectory is enhanced by the native navigation of the TrackingGeometry - between Volumes (via BoundarySurfaces) - between Layers (via interlinking)
• BoundarySurfaces and Layers extend the common Surface base class: - naturally used in Extrapolation • Volumes and Layers carry material information:
Layer based
Material interactions can be taken into account both ways.
Volume based
Navigation between Volumes:
Navigation between Layers:
Model of ATLAS SCT Detector
CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al.
TrackingGeometry: TrackingGeometry: material budgetmaterial budget
Geant4
TrackingGeometry
Very complex fullDetector geometry~ 106 volumes in the ATLAS Inner Detector (ID)
• Modular design of offline Tracking software automatically enhanced testbed for all fitters following a common ITrackFitter interface
• Fatras was used for strategy finding: - check EDM changes
slide by A. Franckowiak
(rrec – rhit)/r
CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al.
applications: applications: magnetic field dep.magnetic field dep.
5000 tracks with 5 GeV simulated with realistic field (109.80 s, 2.0 GHz, including refit)
Refitted (KF) with 100% magnetic field Refitted (KF) with 98% magnetic fieldRefitted (KF) with 100% magnetic field Refitted (KF) with 98% magnetic field
CHEP06, Feb. 2006, Mumbai, India A. Salzburger, et. al.