Overview

When making the TRT RIO_OnTrack, the tool currently provides

• a check if the prediction is in the active region, otherwise the DriftCircleOnTrack making is cancelled,
• the z coordinate (obtained directly from the Track Parameters),
• the left-right solution by setting TRT::SIDE and assigning a sign to R. This left-right solution takes the sign information from the TrackParameters which are represented as Trk::AtaStraightLine in the case of a DriftCircle. The sign definition is detailed in Trk::AtaStraightLine.

A good drift radius calibration needs to be available already at the level of pattern recognition, therefore it is done in the InDet::TRT_DriftFunctionTool and not in the TRT_DriftCircleOnTrackTool.

However, a more sophisticated r-T calibration is planned for this tool to take into account signal run time and possibly wire sagging and the r-T relation for individual tubes.

More general information on <nop>RIO_OnTrackCreation and instructions how to use these tools can be found under Trk::RIO_OnTrackCreator.

Package Managers

The TRT_DriftCircleOnTrackTool package is currently maintained by I. Gavrilenko.