The TrkExRungeKutta package

Propagation of TrackParameters and their associated covariance matrices in a Runge-Kutta integrated method

Introduction

The RungeKuttaPropagator implements the IPropagator interface with a Runge-Kutta integrated method to be used in a non-homogenous magnetic field. In case of absence of a magnetic field the RungeKuttaPropagator would propagate the track-parameters according to a straight line, in case of an homogenous magnetic field, a helical propagation is performed.

Common transformations with the STEP_Propagator can be found in the TrkExUtils package.

The tool implements two abstract interfaces:

• under Trk::IPropagator it provides propagation of EDM Trk::TrackParameters
• under Trk::IPatternParametersPropagator it provides propagation of parameters for internal use, the Trk::PatternTrackParameters

Comments

Please let me know of any errors, or if anything is unclear.

Author

Igor..nosp@m.Gavr.nosp@m.ilenk.nosp@m.o@ce.nosp@m.rn.ch