The ATLAS detector
consists of two independent tracking devices: the Inner Detector (ID) close
to the interaction region and the Muon System (MS). While the Inner Detector
reconstruction has to deal with the high track density that imposes a large number of
combinatorial track candidates, the Muon System track reconstruction is mainly
limited by the huge amount of inert material, the cavern background and the highly
inhomogeneous magnetic field.
In the past - especially during the design phase of the ATLAS experiment -
the ATLAS track reconstruction software consisted for both, ID and MS, of several
competing reconstruction programs, each of which incorporating its own event data model,
different reconstruction geometries, varying concepts in material integration
and separate philosophies in algorithmic sequence and steering. A new track
reconstruction (NEWT) has been deployed that is based on a common Event Data Model
and the definition of interfaces that represent the various tasks (of different
hierarchical level) of the reconstruction application. It is designed in a component
pattern structure that eases the integration of new developed track reconstruction
modules and guarantees maintainability during the long lifetime of the ATLAS experiment.
Being just half a year before the startup of the ATLAS experiment, a review of NEWT
in both design and performance will be presented.
|Submitted on behalf of Collaboration (ex, BaBar, ATLAS)||ATLAS Offline Computing|