FastSimulation/SimplifiedGeometryPropagator/doc/SimplifiedGeometryPropagator.doc - master - githubmirror/cmssw

FastSimulation/SimplifiedGeometryPropagator/doc/SimplifiedGeometryPropagator.doc

73 строки2 KB

Simon Kurz

Recreated branch for further developments

08 фев 2018, 13:54

08 фев 2018, 13:543f554d3


/*!

\page FastSimulation_SimplifiedGeometryPropagator Package FastSimulation/SimplifiedGeometryPropagator


\section desc Description
<!-- Short description of what this package is supposed to provide -->

The goal is to prepare fastsim for the upgrade of the pixel detector. A new, configurable interface for the geometry of the fastsim tracker was developed. To this end, it was necessary to also write a new algorithm for the propagation of the particles inside the tracker.
The package is created inside it's own namespace so none of the standard fastsim code is affected. This allows for easy comparison/validation of the new geometry/particle propagation.

The geometry of the detector used to be hard-coded but can now be specified in a single python file (FastSimulation/Geometry/python/TrackerMaterial_cfi.py)

Motivation for a new algorithm (particle propagation inside the tracker)
- almost impossible to adjust the old algorithm to the new, configurable geometry (hard-coded links have to be omitted)
- old algorithm is flawed
- the new algorithm allows to put material and instruments on any plane perpendicular to z, or on any cylinder with the z-axis as axis
- while the old algorithm, with the requirement of nested layers, forbids the introduction of long narrow cylinders, required for a decent simulation of material in front of HF


\subsection interface Public interface
<!-- List the classes that are provided for use in other packages (if any) -->

- BarrelSimplifiedGeometry
- CMSDummyDeexcitation
- Constants
- Decayer
- ForwardSimplifiedGeometry
- Geometry
- HelixTrajectory
- InteractionModel
- InteractionModelFactory
- LayerNavigator
- Particle
- ParticleFilter
- ParticleManager
- SimplifiedGeometry
- SimplifiedGeometryFactory
- StraightTrajectory
- Trajectory


\subsection pluginai Plugins
<!-- List the plugins that are provided for use in other packages (if any) -->

- Bremsstrahlung
- DummyHitProducer
- EnergyLoss
- FastSimProducer
- MultipleScattering
- MuonBremsstrahlung
- NuclearInteraction
- NuclearInteractionFTF
- PairProduction
- TrackerSimHitProducer


\subsection modules Modules
<!-- Describe modules implemented in this package and their parameter set -->


\subsection tests Unit tests and examples
<!-- Describe cppunit tests and example configuration files -->
Unknown

\section status Status and planned development
<!-- e.g. completed, stable, missing features -->
Unknown

<hr>
Last updated:
@DATE@  Author: Simon Kurz
*/