Mission: to provide a complete, unified,
and memory-efficient description of the ATLAS detector for all of the
offline software. The most important clients we serve are the
simulation, and the reconstruction. The detector description used
by these two clients is the same, and is accessed within Athena through
the transient detector store. It is held in synch with changing
alignment conditions.
The detector is described in terms of a standard set of
geometrical primitives, and a large degree of interface customizability
is provided to subsystems.
The components described in these pages are now deployed
within both simulation and reconstruction.